diff --git a/e2e/coinbase/facilitators/typescript/README.md b/e2e/coinbase/facilitators/typescript/README.md
new file mode 100644
index 00000000..a87bbcad
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/README.md
@@ -0,0 +1,189 @@
+# E2E Test Facilitator: TypeScript
+
+This facilitator demonstrates and tests the TypeScript x402 facilitator implementation with EVM, SVM, and optional Stellar payment verification and settlement.
+
+## What It Tests
+
+### Core Functionality
+- ✅ **V2 Protocol** - Modern x402 facilitator protocol
+- ✅ **V1 Protocol** - Legacy x402 facilitator protocol
+- ✅ **Payment Verification** - Validates payment payloads off-chain
+- ✅ **Payment Settlement** - Executes transactions on-chain
+- ✅ **Multi-chain Support** - EVM, SVM, and (optional) Stellar mechanisms
+- ✅ **HTTP API** - Express.js server exposing facilitator endpoints
+
+### Facilitator Endpoints
+- ✅ `POST /verify` - Verifies payment payload validity
+- ✅ `POST /settle` - Settles payment on blockchain
+- ✅ `GET /supported` - Returns supported payment kinds
+- ✅ **Extension Support** - Bazaar discovery extension
+
+## What It Demonstrates
+
+### Lifecycle Hooks Usage
+
+This e2e facilitator showcases **production-ready lifecycle hook patterns**:
+
+```typescript
+const facilitator = new x402Facilitator()
+  .register("eip155:*", new ExactEvmFacilitator(evmSigner))
+  .register("stellar:*", new ExactStellarScheme([stellarSigner]))
+  .registerExtension(BAZAAR)
+  // Hook 1: Track verified payments + extract discovery info
+  .onAfterVerify(async (context) => {
+    if (context.result.isValid) {
+      const paymentHash = createPaymentHash(context.paymentPayload);
+      verifiedPayments.set(paymentHash, context.timestamp);
+      
+      // Catalog discovered resources
+      const discovered = extractDiscoveryInfo(context.paymentPayload, context.requirements);
+      if (discovered) {
+        bazaarCatalog.catalogResource(discovered);
+      }
+    }
+  })
+  // Hook 2: Validate payment was verified before settlement
+  .onBeforeSettle(async (context) => {
+    const paymentHash = createPaymentHash(context.paymentPayload);
+    if (!verifiedPayments.has(paymentHash)) {
+      return { abort: true, reason: "Payment must be verified first" };
+    }
+    
+    // Check timeout
+    const age = context.timestamp - verifiedPayments.get(paymentHash)!;
+    if (age > 5 * 60 * 1000) {
+      return { abort: true, reason: "Verification expired" };
+    }
+  })
+  // Hook 3: Clean up tracking after settlement
+  .onAfterSettle(async (context) => {
+    const paymentHash = createPaymentHash(context.paymentPayload);
+    verifiedPayments.delete(paymentHash);
+  })
+  // Hook 4: Clean up on failure too
+  .onSettleFailure(async (context) => {
+    const paymentHash = createPaymentHash(context.paymentPayload);
+    verifiedPayments.delete(paymentHash);
+  });
+```
+
+
+### Facilitator Setup
+
+```typescript
+import { x402Facilitator } from "@x402/core/facilitator";
+import { ExactEvmFacilitator } from "@x402/evm";
+import { ExactEvmFacilitatorV1, NETWORKS as EVM_NETWORKS } from "@x402/evm/v1";
+import { ExactSvmFacilitator } from "@x402/svm";
+import { ExactSvmFacilitatorV1, NETWORKS as SVM_NETWORKS } from "@x402/svm/v1";
+import { ExactStellarFacilitator } from "@x402/stellar";
+
+// Create facilitator with bazaar extension
+const facilitator = new x402Facilitator()
+  .registerExtension("bazaar");
+
+// Register EVM V2 wildcard
+facilitator.register(
+  "eip155:*",
+  new ExactEvmFacilitator(evmSigner)
+);
+
+// Register all EVM V1 networks
+EVM_NETWORKS.forEach(network => {
+  facilitator.registerSchemeV1(
+    network,
+    new ExactEvmFacilitatorV1(evmSigner)
+  );
+});
+
+// Register SVM schemes similarly...
+
+// Register Stellar (v2) schemes similarly...
+```
+
+### HTTP Server
+
+```typescript
+import express from "express";
+import { createFacilitatorRouter } from "@x402/server/facilitator";
+
+const app = express();
+app.use(express.json());
+
+// Mount facilitator routes at root
+app.use("/", createFacilitatorRouter(facilitator));
+
+app.listen(port, () => {
+  console.log(`Facilitator ready at http://localhost:${port}`);
+});
+```
+
+### Key Concepts Shown
+
+1. **Extension Registration** - Bazaar discovery
+2. **Comprehensive Network Support** - All EVM V1 networks, all SVM V1 networks
+3. **Wildcard Schemes** - Efficient V2 registration with `eip155:*`, `solana:*`, and `stellar:*`
+4. **HTTP Router Integration** - `@x402/server/facilitator` for Express
+5. **Real Signers** - Actual blockchain transaction submission
+6. **Multi-Protocol** - V1 and V2 side-by-side
+
+## Test Scenarios
+
+This facilitator is tested with:
+- **Clients:** TypeScript Fetch, Go HTTP
+- **Servers:** Express (TypeScript), Gin (Go)
+- **Networks:** Base Sepolia (EVM), Solana Devnet (SVM), Stellar Testnet (Stellar)
+- **Test Cases:**
+  - V1 EVM payments
+  - V2 EVM payments
+  - V1 SVM payments
+  - V2 SVM payments
+  - V2 Stellar payments (optional)
+
+### Success Criteria
+- ✅ Verification returns valid status
+- ✅ Settlement returns transaction hash
+- ✅ Supported endpoint lists all mechanisms
+- ✅ Bazaar extension included
+
+## Running
+
+```bash
+# Via e2e test suite
+cd e2e
+pnpm test --facilitator=typescript
+
+# Direct execution
+cd e2e/facilitators/typescript
+export EVM_PRIVATE_KEY="0x..."
+export SVM_PRIVATE_KEY="..."
+export STELLAR_PRIVATE_KEY="S..." # optional
+export PORT=4025
+pnpm start
+```
+
+## Environment Variables
+
+### Required
+- `PORT` - HTTP server port
+- `EVM_PRIVATE_KEY` - Ethereum private key (hex with 0x prefix)
+- `SVM_PRIVATE_KEY` - Solana private key (base58 encoded)
+
+### Optional
+- `STELLAR_PRIVATE_KEY` - Stellar private key (S... format) - enables Stellar support
+- `EVM_NETWORK` - EVM network (default: eip155:84532)
+- `SVM_NETWORK` - SVM network (default: solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1)
+- `STELLAR_NETWORK` - Stellar network (default: stellar:testnet)
+
+## Package Dependencies
+
+- `@x402/core` - Core facilitator
+- `@x402/server` - Facilitator HTTP router
+- `@x402/evm` - EVM facilitator (V2)
+- `@x402/evm/v1` - EVM facilitator (V1) + NETWORKS
+- `@x402/svm` - SVM facilitator (V2)
+- `@x402/svm/v1` - SVM facilitator (V1) + NETWORKS
+- `@x402/stellar` - Stellar facilitator (V2, SEP-41)
+- `express` - HTTP server
+- `viem` - Ethereum transactions
+- `@solana/web3.js` - Solana transactions
diff --git a/e2e/coinbase/facilitators/typescript/bazaar.ts b/e2e/coinbase/facilitators/typescript/bazaar.ts
new file mode 100644
index 00000000..a09f29fc
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/bazaar.ts
@@ -0,0 +1,59 @@
+import type { DiscoveryInfo } from "@x402/extensions/bazaar";
+import type { PaymentRequirements } from "@x402/core/types";
+
+export interface DiscoveredResource {
+  resource: string;
+  type: "http";
+  x402Version: number;
+  accepts: PaymentRequirements[];
+  discoveryInfo?: DiscoveryInfo;
+  lastUpdated: string;
+  metadata?: Record<string, unknown>;
+}
+
+export class BazaarCatalog {
+  private discoveredResources = new Map<string, DiscoveredResource>();
+
+  catalogResource(
+    resourceUrl: string,
+    method: string,
+    x402Version: number,
+    discoveryInfo: DiscoveryInfo,
+    paymentRequirements: PaymentRequirements,
+  ): void {
+    console.log(`📝 Discovered resource: ${resourceUrl}`);
+    console.log(`   Method: ${method}`);
+    console.log(`   x402 Version: ${x402Version}`);
+
+    this.discoveredResources.set(resourceUrl, {
+      resource: resourceUrl,
+      type: "http",
+      x402Version,
+      accepts: [paymentRequirements],
+      discoveryInfo,
+      lastUpdated: new Date().toISOString(),
+      metadata: {},
+    });
+  }
+
+  getResources(limit: number = 100, offset: number = 0) {
+    const allResources = Array.from(this.discoveredResources.values());
+    const total = allResources.length;
+    const items = allResources.slice(offset, offset + limit);
+
+    return {
+      x402Version: 1,
+      items,
+      pagination: {
+        limit,
+        offset,
+        total,
+      },
+    };
+  }
+
+  getCount(): number {
+    return this.discoveredResources.size;
+  }
+}
+
diff --git a/e2e/coinbase/facilitators/typescript/build.sh b/e2e/coinbase/facilitators/typescript/build.sh
new file mode 100755
index 00000000..f526e2c7
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/build.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# TypeScript build handled by pnpm at root level
+# This file is intentionally empty
+exit 0
+
diff --git a/e2e/coinbase/facilitators/typescript/index.ts b/e2e/coinbase/facilitators/typescript/index.ts
new file mode 100644
index 00000000..9e6c6507
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/index.ts
@@ -0,0 +1,351 @@
+/**
+ * TypeScript Facilitator for E2E Testing (Coinbase SDK version)
+ *
+ * This facilitator provides HTTP endpoints for payment verification and settlement
+ * using the official x402 TypeScript SDK.
+ */
+
+import { x402Facilitator } from "@x402/core/facilitator";
+import {
+  Network,
+  PaymentPayload,
+  PaymentRequirements,
+  SettleResponse,
+  VerifyResponse,
+} from "@x402/core/types";
+import { toFacilitatorEvmSigner } from "@x402/evm";
+import { ExactEvmScheme } from "@x402/evm/exact/facilitator";
+import { BAZAAR, extractDiscoveryInfo } from "@x402/extensions/bazaar";
+import {
+  EIP2612_GAS_SPONSORING,
+  createErc20ApprovalGasSponsoringExtension,
+} from "@x402/extensions";
+import crypto from "crypto";
+import dotenv from "dotenv";
+import express from "express";
+import { createWalletClient, http, publicActions, Chain } from "viem";
+import { privateKeyToAccount } from "viem/accounts";
+import { bscTestnet, base } from "viem/chains";
+import { BazaarCatalog } from "./bazaar.js";
+
+dotenv.config();
+
+// Configuration
+const PORT = process.env.PORT || "4022";
+const EVM_NETWORK = (process.env.EVM_NETWORK || "eip155:97") as Network;
+const EVM_RPC_URL = process.env.EVM_RPC_URL;
+
+// Map CAIP-2 network IDs to viem chains
+function getEvmChain(network: string): Chain {
+  switch (network) {
+    case "eip155:8453":
+      return base;
+    case "eip155:97":
+    default:
+      return bscTestnet;
+  }
+}
+
+console.log(`🌐 EVM Network: ${EVM_NETWORK}`);
+if (EVM_RPC_URL) console.log(`🌐 EVM RPC URL: ${EVM_RPC_URL}`);
+
+// Validate required environment variables
+if (!process.env.EVM_PRIVATE_KEY) {
+  console.error("❌ EVM_PRIVATE_KEY environment variable is required");
+  process.exit(1);
+}
+
+// Initialize the EVM account from private key
+const evmAccount = privateKeyToAccount(
+  process.env.EVM_PRIVATE_KEY as `0x${string}`,
+);
+console.info(`EVM Facilitator account: ${evmAccount.address}`);
+
+// Create a Viem client with both wallet and public capabilities
+const evmChain = getEvmChain(EVM_NETWORK);
+const viemClient = createWalletClient({
+  account: evmAccount,
+  chain: evmChain,
+  transport: http(EVM_RPC_URL),
+}).extend(publicActions);
+
+// Initialize the x402 Facilitator with EVM support
+const evmSigner = toFacilitatorEvmSigner({
+  address: evmAccount.address,
+  readContract: (args: {
+    address: `0x${string}`;
+    abi: readonly unknown[];
+    functionName: string;
+    args?: readonly unknown[];
+  }) =>
+    viemClient.readContract({
+      ...args,
+      args: args.args || [],
+    }),
+  verifyTypedData: (args: {
+    address: `0x${string}`;
+    domain: Record<string, unknown>;
+    types: Record<string, unknown>;
+    primaryType: string;
+    message: Record<string, unknown>;
+    signature: `0x${string}`;
+  }) => viemClient.verifyTypedData(args as any),
+  writeContract: (args: {
+    address: `0x${string}`;
+    abi: readonly unknown[];
+    functionName: string;
+    args: readonly unknown[];
+  }) =>
+    viemClient.writeContract({
+      ...args,
+      args: args.args || [],
+    }),
+  sendTransaction: (args: { to: `0x${string}`; data: `0x${string}` }) =>
+    viemClient.sendTransaction(args),
+  waitForTransactionReceipt: (args: { hash: `0x${string}` }) =>
+    viemClient.waitForTransactionReceipt(args),
+  getCode: (args: { address: `0x${string}` }) => viemClient.getCode(args),
+});
+
+const verifiedPayments = new Map<string, number>();
+const bazaarCatalog = new BazaarCatalog();
+
+function createPaymentHash(paymentPayload: PaymentPayload): string {
+  return crypto
+    .createHash("sha256")
+    .update(JSON.stringify(paymentPayload))
+    .digest("hex");
+}
+
+const facilitator = new x402Facilitator();
+
+// Register EVM scheme (v2 only)
+facilitator.register(EVM_NETWORK, new ExactEvmScheme(evmSigner));
+
+facilitator
+  .registerExtension(BAZAAR)
+  .registerExtension(EIP2612_GAS_SPONSORING)
+  .registerExtension(createErc20ApprovalGasSponsoringExtension(evmSigner, viemClient))
+  // Lifecycle hooks for payment tracking and discovery
+  .onAfterVerify(async (context) => {
+    // Hook 1: Track verified payment for verify→settle flow validation
+    if (context.result.isValid) {
+      const paymentHash = createPaymentHash(context.paymentPayload);
+      verifiedPayments.set(paymentHash, Date.now());
+
+      // Hook 2: Extract and catalog bazaar discovery info
+      const discovered = extractDiscoveryInfo(
+        context.paymentPayload,
+        context.requirements,
+      );
+      if (discovered && "method" in discovered && discovered.method) {
+        bazaarCatalog.catalogResource(
+          discovered.resourceUrl,
+          discovered.method,
+          discovered.x402Version,
+          discovered.discoveryInfo,
+          context.requirements,
+        );
+        console.log(
+          `📦 Discovered resource: ${discovered.method} ${discovered.resourceUrl}`,
+        );
+      }
+    }
+  })
+  .onBeforeSettle(async (context) => {
+    // Hook 3: Validate payment was previously verified
+    const paymentHash = createPaymentHash(context.paymentPayload);
+    const verificationTimestamp = verifiedPayments.get(paymentHash);
+
+    if (!verificationTimestamp) {
+      return {
+        abort: true,
+        reason: "Payment must be verified before settlement",
+      };
+    }
+
+    // Check verification isn't too old (5 minute timeout)
+    const age = Date.now() - verificationTimestamp;
+    if (age > 5 * 60 * 1000) {
+      verifiedPayments.delete(paymentHash);
+      return {
+        abort: true,
+        reason: "Payment verification expired (must settle within 5 minutes)",
+      };
+    }
+  })
+  .onAfterSettle(async (context) => {
+    // Hook 4: Clean up verified payment tracking after settlement
+    const paymentHash = createPaymentHash(context.paymentPayload);
+    verifiedPayments.delete(paymentHash);
+
+    if (context.result.success) {
+      console.log(`✅ Settlement completed: ${context.result.transaction}`);
+    }
+  })
+  .onSettleFailure(async (context) => {
+    // Hook 5: Clean up on settlement failure too
+    const paymentHash = createPaymentHash(context.paymentPayload);
+    verifiedPayments.delete(paymentHash);
+
+    console.error(`❌ Settlement failed: ${context.error.message}`);
+  });
+
+// Initialize Express app
+const app = express();
+app.use(express.json());
+
+/**
+ * POST /verify
+ * Verify a payment against requirements
+ */
+app.post("/verify", async (req, res) => {
+  try {
+    const { paymentPayload, paymentRequirements } = req.body as {
+      paymentPayload: PaymentPayload;
+      paymentRequirements: PaymentRequirements;
+    };
+
+    if (!paymentPayload || !paymentRequirements) {
+      return res.status(400).json({
+        error: "Missing paymentPayload or paymentRequirements",
+      });
+    }
+
+    const response: VerifyResponse = await facilitator.verify(
+      paymentPayload,
+      paymentRequirements,
+    );
+
+    res.json(response);
+  } catch (error) {
+    console.error("Verify error:", error);
+    res.status(500).json({
+      error: error instanceof Error ? error.message : "Unknown error",
+    });
+  }
+});
+
+/**
+ * POST /settle
+ * Settle a payment on-chain
+ */
+app.post("/settle", async (req, res) => {
+  try {
+    const { paymentPayload, paymentRequirements } = req.body;
+
+    if (!paymentPayload || !paymentRequirements) {
+      return res.status(400).json({
+        error: "Missing paymentPayload or paymentRequirements",
+      });
+    }
+
+    const response: SettleResponse = await facilitator.settle(
+      paymentPayload as PaymentPayload,
+      paymentRequirements as PaymentRequirements,
+    );
+
+    res.json(response);
+  } catch (error) {
+    console.error("Settle error:", error);
+
+    // Check if this was an abort from hook
+    if (
+      error instanceof Error &&
+      error.message.includes("Settlement aborted:")
+    ) {
+      return res.json({
+        success: false,
+        errorReason: error.message.replace("Settlement aborted: ", ""),
+        network: req.body?.paymentPayload?.network || "unknown",
+      } as SettleResponse);
+    }
+
+    res.status(500).json({
+      error: error instanceof Error ? error.message : "Unknown error",
+    });
+  }
+});
+
+/**
+ * GET /supported
+ * Get supported payment kinds and extensions
+ */
+app.get("/supported", async (req, res) => {
+  try {
+    const response = facilitator.getSupported();
+    res.json(response);
+  } catch (error) {
+    console.error("Supported error:", error);
+    res.status(500).json({
+      error: error instanceof Error ? error.message : "Unknown error",
+    });
+  }
+});
+
+app.get("/discovery/resources", (req, res) => {
+  try {
+    const limit = parseInt(req.query.limit as string) || 100;
+    const offset = parseInt(req.query.offset as string) || 0;
+
+    const response = bazaarCatalog.getResources(limit, offset);
+    res.json(response);
+  } catch (error) {
+    console.error("Discovery resources error:", error);
+    res.status(500).json({
+      error: error instanceof Error ? error.message : "Unknown error",
+    });
+  }
+});
+
+/**
+ * GET /health
+ * Health check endpoint
+ */
+app.get("/health", (req, res) => {
+  res.json({
+    status: "ok",
+    evmNetwork: EVM_NETWORK,
+    facilitator: "typescript",
+    version: "2.0.0",
+    extensions: [BAZAAR.key],
+    discoveredResources: bazaarCatalog.getCount(),
+  });
+});
+
+/**
+ * POST /close
+ * Graceful shutdown endpoint
+ */
+app.post("/close", (req, res) => {
+  res.json({ message: "Facilitator shutting down gracefully" });
+  console.log("Received shutdown request");
+
+  setTimeout(() => {
+    process.exit(0);
+  }, 100);
+});
+
+// Start the server
+app.listen(parseInt(PORT), () => {
+  console.log(`
+╔════════════════════════════════════════════════════════╗
+║    x402 TypeScript Facilitator (Coinbase SDK)          ║
+╠════════════════════════════════════════════════════════╣
+║  Server:       http://localhost:${PORT}                ║
+║  EVM Network:  ${EVM_NETWORK}                          ║
+║  EVM Address:  ${evmAccount.address}                   ║
+║  Extensions:   bazaar                                  ║
+║                                                        ║
+║  Endpoints:                                            ║
+║  • POST /verify              (verify payment)          ║
+║  • POST /settle              (settle payment)          ║
+║  • GET  /supported           (get supported kinds)     ║
+║  • GET  /discovery/resources (list discovered)         ║
+║  • GET  /health              (health check)            ║
+║  • POST /close               (shutdown server)         ║
+╚════════════════════════════════════════════════════════╝
+  `);
+
+  console.log("Facilitator listening");
+});
diff --git a/e2e/coinbase/facilitators/typescript/install.sh b/e2e/coinbase/facilitators/typescript/install.sh
new file mode 100755
index 00000000..220dd872
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/install.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# TypeScript dependencies handled by pnpm install at root level
+# This file is intentionally empty
+exit 0
+
diff --git a/e2e/coinbase/facilitators/typescript/package.json b/e2e/coinbase/facilitators/typescript/package.json
new file mode 100644
index 00000000..e3712d27
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/package.json
@@ -0,0 +1,30 @@
+{
+  "name": "@bankofai/x402-e2e-coinbase-facilitator-typescript",
+  "version": "2.0.0",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "start": "tsx index.ts",
+    "dev": "tsx watch index.ts",
+    "build": "tsc",
+    "lint": "eslint .",
+    "format": "prettier --write .",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@x402/core": "^2.6.0",
+    "@x402/evm": "^2.6.0",
+    "@x402/extensions": "^2.6.0",
+    "dotenv": "^16.4.5",
+    "express": "^4.19.2",
+    "viem": "^2.21.54"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.21",
+    "@types/node": "^22.10.1",
+    "eslint": "^9.15.0",
+    "prettier": "^3.3.3",
+    "tsx": "^4.19.2",
+    "typescript": "^5.7.2"
+  }
+}
\ No newline at end of file
diff --git a/e2e/coinbase/facilitators/typescript/run.sh b/e2e/coinbase/facilitators/typescript/run.sh
new file mode 100755
index 00000000..2864b3a7
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/run.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+pnpm start
diff --git a/e2e/coinbase/facilitators/typescript/test.config.json b/e2e/coinbase/facilitators/typescript/test.config.json
new file mode 100644
index 00000000..a8cab090
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/test.config.json
@@ -0,0 +1,28 @@
+{
+  "name": "coinbase-typescript",
+  "type": "facilitator",
+  "language": "typescript",
+  "protocolFamilies": [
+    "evm"
+  ],
+  "x402Versions": [
+    2
+  ],
+  "extensions": [
+    "bazaar",
+    "eip2612GasSponsoring",
+    "erc20ApprovalGasSponsoring"
+  ],
+  "evm": {
+    "transferMethods": ["eip3009", "permit2"]
+  },
+  "environment": {
+    "required": [
+      "PORT",
+      "EVM_PRIVATE_KEY"
+    ],
+    "optional": [
+      "EVM_NETWORK"
+    ]
+  }
+}
diff --git a/e2e/coinbase/facilitators/typescript/tsconfig.json b/e2e/coinbase/facilitators/typescript/tsconfig.json
new file mode 100644
index 00000000..e85a5d7c
--- /dev/null
+++ b/e2e/coinbase/facilitators/typescript/tsconfig.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "lib": [
+      "ES2022"
+    ],
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "outDir": "./dist"
+  },
+  "include": [
+    "*.ts"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist"
+  ]
+}
\ No newline at end of file
diff --git a/e2e/coinbase/servers/express/.prettierignore b/e2e/coinbase/servers/express/.prettierignore
new file mode 100644
index 00000000..5bd240ba
--- /dev/null
+++ b/e2e/coinbase/servers/express/.prettierignore
@@ -0,0 +1,8 @@
+docs/
+dist/
+node_modules/
+coverage/
+.github/
+src/client
+**/**/*.json
+*.md
\ No newline at end of file
diff --git a/e2e/coinbase/servers/express/.prettierrc b/e2e/coinbase/servers/express/.prettierrc
new file mode 100644
index 00000000..ffb416b7
--- /dev/null
+++ b/e2e/coinbase/servers/express/.prettierrc
@@ -0,0 +1,11 @@
+{
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": false,
+  "trailingComma": "all",
+  "bracketSpacing": true,
+  "arrowParens": "avoid",
+  "printWidth": 100,
+  "proseWrap": "never"
+}
diff --git a/e2e/coinbase/servers/express/README.md b/e2e/coinbase/servers/express/README.md
new file mode 100644
index 00000000..89623ce0
--- /dev/null
+++ b/e2e/coinbase/servers/express/README.md
@@ -0,0 +1,194 @@
+# E2E Test Server: Express (TypeScript)
+
+This server demonstrates and tests the x402 Express.js middleware with EVM, SVM, and optional Stellar payment protection.
+
+## What It Tests
+
+### Core Functionality
+- ✅ **V2 Protocol** - Modern x402 server middleware
+- ✅ **Payment Protection** - Middleware protecting specific routes
+- ✅ **Multi-chain Support** - EVM, SVM, and (optional) Stellar payment acceptance
+- ✅ **Facilitator Integration** - HTTP communication with facilitator
+- ✅ **Extension Support** - Bazaar discovery metadata
+- ✅ **Settlement Handling** - Payment verification and confirmation
+
+### Protected Endpoints
+- ✅ `GET /protected` - Requires EVM payment (USDC on Base Sepolia)
+- ✅ `GET /protected-svm` - Requires SVM payment (USDC on Solana Devnet)
+- ✅ `GET /protected-stellar` - Requires Stellar payment (USDC on Stellar Testnet)
+
+## What It Demonstrates
+
+### Server Setup
+
+```typescript
+import express from "express";
+import { x402Middleware } from "@x402/server/express";
+import { ExactEvmServer } from "@x402/evm";
+import { ExactSvmServer } from "@x402/svm";
+import { ExactStellarServer } from "@x402/stellar";
+
+const app = express();
+
+// Define payment requirements for routes
+const routes = {
+  "GET /protected": {
+    scheme: "exact",
+    network: "eip155:84532",
+    payTo: "0xYourAddress",
+    price: "$0.001",
+    extensions: {
+      bazaar: discoveryMetadata
+    }
+  },
+  "GET /protected-svm": {
+    scheme: "exact",
+    network: "solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1",
+    payTo: "YourSolanaAddress",
+    price: "$0.001",
+    extensions: {
+      bazaar: discoveryMetadata
+    }
+  },
+  "GET /protected-stellar": {
+    scheme: "exact",
+    network: "stellar:testnet",
+    payTo: "YourStellarAddress",
+    price: "$0.001",
+    extensions: {
+      bazaar: discoveryMetadata
+    }
+  }
+};
+
+// Apply x402 middleware with EVM, SVM, and Stellar servers
+app.use(x402Middleware({
+  routes,
+  facilitatorUrl: "http://localhost:4023",
+  servers: {
+    "eip155:84532": new ExactEvmServer(),
+    "solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1": new ExactSvmServer(),
+    "stellar:testnet": new ExactStellarServer()
+  }
+}));
+
+// Define protected endpoints
+app.get("/protected", (req, res) => {
+  res.json({ message: "EVM payment successful!" });
+});
+
+app.get("/protected-svm", (req, res) => {
+  res.json({ message: "SVM payment successful!" });
+});
+
+app.get("/protected-stellar", (req, res) => {
+  res.json({ message: "Stellar payment successful!" });
+});
+```
+
+### Key Concepts Shown
+
+1. **Route-Based Configuration** - Payment requirements per route
+2. **Multi-Chain Services** - Different services for different networks
+3. **Price Parsing** - Dollar amounts converted to token units
+4. **Facilitator Client** - HTTP communication with payment processor
+5. **Extension Metadata** - Bazaar discovery info embedded in responses
+6. **Automatic 402 Responses** - Middleware generates payment requirements
+
+## Test Scenarios
+
+This server is tested with:
+- **Clients:** TypeScript Fetch, Axios, Python httpx, requests
+- **Facilitators:** TypeScript, Python
+- **Payment Types:** EVM (Base Sepolia), SVM (Solana Devnet), Stellar (Stellar Testnet)
+- **Protocols:** V2 (primary), V1 (via client negotiation)
+
+### Request Flow
+1. Client makes initial request (no payment)
+2. Middleware returns 402 with payment requirements
+3. Client creates payment payload
+4. Client retries with payment signature
+5. Middleware verifies payment via facilitator
+6. Middleware returns protected content
+
+## Running
+
+```bash
+# Via e2e test suite
+cd e2e
+pnpm test --server=express
+
+# Direct execution
+cd e2e/servers/express
+export FACILITATOR_URL="http://localhost:4023"
+export EVM_PAYEE_ADDRESS="0x..."
+export SVM_PAYEE_ADDRESS="..."
+export STELLAR_PAYEE_ADDRESS="G..." # optional
+export PORT=4022
+pnpm start
+```
+
+## Environment Variables
+
+### Required
+- `PORT` - HTTP server port (default: 4022)
+- `FACILITATOR_URL` - Facilitator endpoint URL
+- `EVM_PAYEE_ADDRESS` - Ethereum address to receive payments
+- `SVM_PAYEE_ADDRESS` - Solana address to receive payments
+
+### Optional
+- `STELLAR_PAYEE_ADDRESS` - Stellar address to receive payments - enables Stellar endpoint
+- `EVM_NETWORK` - EVM network (default: eip155:84532)
+- `SVM_NETWORK` - SVM network (default: solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1)
+- `STELLAR_NETWORK` - Stellar network (default: stellar:testnet)
+
+## Response Examples
+
+### 402 Payment Required (No Payment Sent)
+
+```
+HTTP/1.1 402 Payment Required
+PAYMENT-REQUIRED: <base64-encoded-payment-requirements>
+
+{
+  "error": "Payment required",
+  "x402Version": 2,
+  "accepts": [...]
+}
+```
+
+### 200 Success (Payment Verified)
+
+```
+HTTP/1.1 200 OK
+PAYMENT-RESPONSE: <base64-encoded-settlement-response>
+
+{
+  "message": "Protected endpoint accessed successfully"
+}
+```
+
+## Package Dependencies
+
+- `@x402/server` - Express middleware
+- `@x402/evm` - EVM server
+- `@x402/svm` - SVM server
+- `@x402/stellar` - Stellar server
+- `@x402/extensions/bazaar` - Discovery extension
+- `express` - HTTP server framework
+
+## Implementation Highlights
+
+### Middleware Features
+- **Automatic 402 Responses** - Generates payment requirements
+- **Payment Verification** - Validates via facilitator
+- **Settlement Tracking** - Includes payment response headers
+- **Extension Support** - Embeds bazaar metadata
+- **Error Handling** - Clear error messages for payment failures
+
+### Service Integration
+- **EVM Server** - Handles Base Sepolia USDC payments
+- **SVM Server** - Handles Solana Devnet USDC payments
+- **Stellar Server** - Handles Stellar Testnet USDC contract payments (SEP-41)
+- **Price Conversion** - "$0.001" → token amounts with decimals
+- **Asset Resolution** - Automatic USDC contract/mint lookup
diff --git a/e2e/coinbase/servers/express/build.sh b/e2e/coinbase/servers/express/build.sh
new file mode 100755
index 00000000..f526e2c7
--- /dev/null
+++ b/e2e/coinbase/servers/express/build.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# TypeScript build handled by pnpm at root level
+# This file is intentionally empty
+exit 0
+
diff --git a/e2e/coinbase/servers/express/eslint.config.js b/e2e/coinbase/servers/express/eslint.config.js
new file mode 100644
index 00000000..e2fde7b3
--- /dev/null
+++ b/e2e/coinbase/servers/express/eslint.config.js
@@ -0,0 +1,73 @@
+import js from "@eslint/js";
+import ts from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+import prettier from "eslint-plugin-prettier";
+import jsdoc from "eslint-plugin-jsdoc";
+import importPlugin from "eslint-plugin-import";
+
+export default [
+  {
+    ignores: ["dist/**", "node_modules/**"],
+  },
+  {
+    files: ["**/*.ts"],
+    languageOptions: {
+      parser: tsParser,
+      sourceType: "module",
+      ecmaVersion: 2020,
+      globals: {
+        process: "readonly",
+        __dirname: "readonly",
+        module: "readonly",
+        require: "readonly",
+        Buffer: "readonly",
+        console: "readonly",
+        exports: "readonly",
+        setTimeout: "readonly",
+        clearTimeout: "readonly",
+        setInterval: "readonly",
+        clearInterval: "readonly",
+      },
+    },
+    plugins: {
+      "@typescript-eslint": ts,
+      prettier: prettier,
+      jsdoc: jsdoc,
+      import: importPlugin,
+    },
+    rules: {
+      ...ts.configs.recommended.rules,
+      "import/first": "error",
+      "prettier/prettier": "error",
+      "@typescript-eslint/member-ordering": "error",
+      "@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_$" }],
+      "jsdoc/tag-lines": ["error", "any", { startLines: 1 }],
+      "jsdoc/check-alignment": "error",
+      "jsdoc/no-undefined-types": "off",
+      "jsdoc/check-param-names": "error",
+      "jsdoc/check-tag-names": "error",
+      "jsdoc/check-types": "error",
+      "jsdoc/implements-on-classes": "error",
+      "jsdoc/require-description": "error",
+      "jsdoc/require-jsdoc": [
+        "error",
+        {
+          require: {
+            FunctionDeclaration: true,
+            MethodDefinition: true,
+            ClassDeclaration: true,
+            ArrowFunctionExpression: false,
+            FunctionExpression: false,
+          },
+        },
+      ],
+      "jsdoc/require-param": "error",
+      "jsdoc/require-param-description": "error",
+      "jsdoc/require-param-type": "off",
+      "jsdoc/require-returns": "error",
+      "jsdoc/require-returns-description": "error",
+      "jsdoc/require-returns-type": "off",
+      "jsdoc/require-hyphen-before-param-description": ["error", "always"],
+    },
+  },
+];
diff --git a/e2e/coinbase/servers/express/index.ts b/e2e/coinbase/servers/express/index.ts
new file mode 100644
index 00000000..b3f5b74e
--- /dev/null
+++ b/e2e/coinbase/servers/express/index.ts
@@ -0,0 +1,242 @@
+import express from "express";
+import { paymentMiddleware } from "@x402/express";
+import { x402ResourceServer, HTTPFacilitatorClient } from "@x402/core/server";
+import { ExactEvmScheme } from "@x402/evm/exact/server";
+import {
+  bazaarResourceServerExtension,
+  declareDiscoveryExtension,
+} from "@x402/extensions/bazaar";
+import {
+  declareEip2612GasSponsoringExtension,
+  declareErc20ApprovalGasSponsoringExtension,
+} from "@x402/extensions";
+import dotenv from "dotenv";
+
+dotenv.config();
+
+/**
+ * Express E2E Test Server with x402 Payment Middleware (Coinbase SDK version)
+ *
+ * This server demonstrates how to integrate x402 payment middleware
+ * with an Express application for end-to-end testing using official SDK.
+ */
+
+const PORT = process.env.PORT || "4021";
+const EVM_NETWORK = (process.env.EVM_NETWORK || "eip155:97") as `${string}:${string}`;
+const EVM_PAYEE_ADDRESS = process.env.EVM_PAYEE_ADDRESS as `0x${string}`;
+const facilitatorUrl = process.env.FACILITATOR_URL;
+
+if (!EVM_PAYEE_ADDRESS) {
+  console.error("❌ EVM_PAYEE_ADDRESS environment variable is required");
+  process.exit(1);
+}
+
+if (!facilitatorUrl) {
+  console.error("❌ FACILITATOR_URL environment variable is required");
+  process.exit(1);
+}
+
+// Initialize Express app
+const app = express();
+
+// Create HTTP facilitator client
+const facilitatorClient = new HTTPFacilitatorClient({ url: facilitatorUrl });
+
+// Create x402 resource server
+const server = new x402ResourceServer(facilitatorClient);
+
+// Create ExactEvmScheme and register a MoneyParser for the DHLU token
+// DHLU supports EIP-3009, EIP-2612, and standard ERC-20.
+const evmScheme = new ExactEvmScheme().registerMoneyParser(async (amount, network) => {
+  if (network === EVM_NETWORK) {
+    // Map scalar price (e.g. $0.001) to 1000 DHLU (decimals: 6)
+    return {
+      amount: Math.floor(amount * 1_000_000).toString(),
+      asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816",
+      extra: { name: "DA HULU", version: "1", supportsEip2612: true }
+    };
+  }
+  return null;
+});
+
+// Register server schemes
+server.register("eip155:*", evmScheme);
+
+// Register Bazaar discovery extension
+server.registerExtension(bazaarResourceServerExtension);
+
+console.log(
+  `Facilitator account: ${process.env.EVM_PRIVATE_KEY ? process.env.EVM_PRIVATE_KEY.substring(0, 10) + "..." : "not configured"}`,
+);
+console.log(`Using remote facilitator at: ${facilitatorUrl}`);
+
+/**
+ * Configure x402 payment middleware using builder pattern
+ */
+app.use(
+  paymentMiddleware(
+    {
+      // Route-specific payment configuration
+      "GET /protected": {
+        accepts: {
+          payTo: EVM_PAYEE_ADDRESS,
+          scheme: "exact",
+          network: EVM_NETWORK,
+          assets: ["DHLU"],
+          price: "$0.001",
+        },
+        extensions: {
+          ...declareDiscoveryExtension({
+            output: {
+              example: {
+                message: "Protected endpoint accessed successfully",
+                timestamp: "2024-01-01T00:00:00Z",
+              },
+              schema: {
+                properties: {
+                  message: { type: "string" },
+                  timestamp: { type: "string" },
+                },
+                required: ["message", "timestamp"],
+              },
+            },
+          }),
+        },
+      },
+      // Permit2 endpoint for generic ERC-20 tokens (no EIP-2612, uses raw approve tx)
+      "GET /protected-permit2-erc20": {
+        accepts: {
+          payTo: EVM_PAYEE_ADDRESS,
+          scheme: "exact",
+          network: EVM_NETWORK,
+          assets: ["DHLU"],
+          price: {
+            amount: "1000",
+            asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816", // DHLU (ERC-20 approval path, no name/version)
+            extra: {
+              assetTransferMethod: "permit2",
+            },
+          },
+        },
+        extensions: {
+          ...declareErc20ApprovalGasSponsoringExtension(),
+        },
+      },
+      // Permit2 endpoint - explicitly requires Permit2 flow instead of EIP-3009
+      "GET /protected-permit2": {
+        accepts: {
+          payTo: EVM_PAYEE_ADDRESS,
+          scheme: "exact",
+          network: EVM_NETWORK,
+          assets: ["DHLU"],
+          price: {
+            amount: "1000",
+            asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816", // DHLU (permit2 + EIP-2612 path)
+            extra: {
+              name: "DA HULU",
+              version: "1",
+              assetTransferMethod: "permit2",
+            },
+          },
+        },
+        extensions: {
+          ...declareDiscoveryExtension({
+            output: {
+              example: {
+                message: "Permit2 endpoint accessed successfully",
+                timestamp: "2024-01-01T00:00:00Z",
+                method: "permit2",
+              },
+              schema: {
+                properties: {
+                  message: { type: "string" },
+                  timestamp: { type: "string" },
+                  method: { type: "string" },
+                },
+                required: ["message", "timestamp", "method"],
+              },
+            },
+          }),
+          ...declareEip2612GasSponsoringExtension(),
+        },
+      },
+    },
+    server, // Pass pre-configured server instance
+  ),
+);
+
+/**
+ * Protected endpoint - requires payment to access
+ */
+app.get("/protected", (req, res) => {
+  res.json({
+    message: "Protected endpoint accessed successfully",
+    timestamp: new Date().toISOString(),
+  });
+});
+
+/**
+ * Protected Permit2 ERC-20 endpoint - requires payment via Permit2 flow with ERC-20 approval
+ */
+app.get("/protected-permit2-erc20", (req, res) => {
+  res.json({
+    message: "Permit2 ERC-20 approval endpoint accessed successfully",
+    timestamp: new Date().toISOString(),
+    method: "permit2-erc20-approval",
+  });
+});
+
+/**
+ * Protected Permit2 endpoint - requires payment via Permit2 flow
+ */
+app.get("/protected-permit2", (req, res) => {
+  res.json({
+    message: "Permit2 endpoint accessed successfully",
+    timestamp: new Date().toISOString(),
+    method: "permit2",
+  });
+});
+
+/**
+ * Health check endpoint - no payment required
+ */
+app.get("/health", (req, res) => {
+  res.json({
+    status: "ok",
+    network: EVM_NETWORK,
+    payee: EVM_PAYEE_ADDRESS,
+    version: "2.0.0",
+  });
+});
+
+/**
+ * Shutdown endpoint - used by e2e tests
+ */
+app.post("/close", (req, res) => {
+  res.json({ message: "Server shutting down gracefully" });
+  console.log("Received shutdown request");
+
+  setTimeout(() => {
+    process.exit(0);
+  }, 100);
+});
+
+// Start the server
+app.listen(parseInt(PORT), () => {
+  console.log(`
+╔════════════════════════════════════════════════════════╗
+║    x402 Express E2E Test Server (Coinbase SDK)         ║
+╠════════════════════════════════════════════════════════╣
+║  Server:       http://localhost:${PORT}                ║
+║  EVM Network:  ${EVM_NETWORK}                          ║
+║  EVM Payee:    ${EVM_PAYEE_ADDRESS}                    ║
+║                                                        ║
+║  Endpoints:                                            ║
+║  • GET  /protected             (EIP-3009 payment - EVM)    ║
+║  • GET  /protected-permit2     (Permit2 payment - EVM)     ║
+║  • GET  /protected-permit2-erc20 (Permit2 + ERC-20 approval) ║
+║  • GET  /health                (no payment required)       ║
+║  • POST /close                 (shutdown server)           ║
+╚════════════════════════════════════════════════════════╝
+  `);
+});
diff --git a/e2e/coinbase/servers/express/install.sh b/e2e/coinbase/servers/express/install.sh
new file mode 100755
index 00000000..220dd872
--- /dev/null
+++ b/e2e/coinbase/servers/express/install.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# TypeScript dependencies handled by pnpm install at root level
+# This file is intentionally empty
+exit 0
+
diff --git a/e2e/coinbase/servers/express/package.json b/e2e/coinbase/servers/express/package.json
new file mode 100644
index 00000000..2bfa6685
--- /dev/null
+++ b/e2e/coinbase/servers/express/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "@bankofai/x402-coinbase-express-e2e",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "tsx index.ts",
+    "format": "prettier -c .prettierrc --write \"**/*.{ts,js,cjs,json,md}\"",
+    "format:check": "prettier -c .prettierrc --check \"**/*.{ts,js,cjs,json,md}\"",
+    "lint": "eslint . --ext .ts --fix",
+    "lint:check": "eslint . --ext .ts"
+  },
+  "dependencies": {
+    "@x402/core": "^2.6.0",
+    "@x402/express": "^2.6.0",
+    "@x402/evm": "^2.6.0",
+    "@x402/extensions": "^2.6.0",
+    "dotenv": "^16.6.1",
+    "express": "^4.18.2"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.24.0",
+    "@types/express": "^5.0.1",
+    "@typescript-eslint/eslint-plugin": "^8.29.1",
+    "@typescript-eslint/parser": "^8.29.1",
+    "eslint": "^9.24.0",
+    "eslint-plugin-import": "^2.31.0",
+    "eslint-plugin-jsdoc": "^50.6.9",
+    "eslint-plugin-prettier": "^5.2.6",
+    "prettier": "3.5.2",
+    "tsup": "^7.2.0",
+    "tsx": "^4.7.0",
+    "typescript": "^5.3.0"
+  }
+}
diff --git a/e2e/coinbase/servers/express/run.sh b/e2e/coinbase/servers/express/run.sh
new file mode 100755
index 00000000..aa2c67d6
--- /dev/null
+++ b/e2e/coinbase/servers/express/run.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+pnpm dev 
\ No newline at end of file
diff --git a/e2e/coinbase/servers/express/test.config.json b/e2e/coinbase/servers/express/test.config.json
new file mode 100644
index 00000000..b1aaf614
--- /dev/null
+++ b/e2e/coinbase/servers/express/test.config.json
@@ -0,0 +1,50 @@
+{
+  "name": "coinbase-express",
+  "type": "server",
+  "language": "typescript",
+  "x402Version": 2,
+  "extensions": ["bazaar", "eip2612GasSponsoring", "erc20ApprovalGasSponsoring"],
+  "endpoints": [
+    {
+      "path": "/protected",
+      "method": "GET",
+      "description": "Protected endpoint requiring EIP-3009 payment",
+      "requiresPayment": true,
+      "protocolFamily": "evm",
+      "transferMethod": "eip3009"
+    },
+    {
+      "path": "/protected-permit2",
+      "method": "GET",
+      "description": "Protected endpoint requiring Permit2 payment",
+      "requiresPayment": true,
+      "protocolFamily": "evm",
+      "transferMethod": "permit2"
+    },
+    {
+      "path": "/protected-permit2-erc20",
+      "method": "GET",
+      "description": "Protected endpoint requiring Permit2 payment with ERC-20 approval gas sponsoring",
+      "requiresPayment": true,
+      "protocolFamily": "evm",
+      "transferMethod": "permit2",
+      "extensions": ["erc20ApprovalGasSponsoring"]
+    },
+    {
+      "path": "/health",
+      "method": "GET",
+      "description": "Health check endpoint",
+      "health": true
+    },
+    {
+      "path": "/close",
+      "method": "POST",
+      "description": "Graceful shutdown endpoint",
+      "close": true
+    }
+  ],
+  "environment": {
+    "required": ["PORT", "EVM_PAYEE_ADDRESS", "FACILITATOR_URL"],
+    "optional": []
+  }
+}
diff --git a/e2e/coinbase/servers/express/tsconfig.json b/e2e/coinbase/servers/express/tsconfig.json
new file mode 100644
index 00000000..78f9479b
--- /dev/null
+++ b/e2e/coinbase/servers/express/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ES2020",
+    "moduleResolution": "bundler",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "resolveJsonModule": true,
+    "baseUrl": ".",
+    "types": ["node"]
+  },
+  "include": ["index.ts"]
+}
diff --git a/e2e/package.json b/e2e/package.json
index feaefc68..b47bd45e 100644
--- a/e2e/package.json
+++ b/e2e/package.json
@@ -8,6 +8,7 @@
     "test:watch": "tsc --watch",
     "setup": "./setup.sh",
     "setup:legacy": "./setup.sh --legacy",
+    "setup:coinbase": "./setup.sh --coinbase",
     "install:all": "pnpm install && ./setup.sh",
     "install:all:legacy": "pnpm install && ./setup.sh --legacy",
     "clean": "rm -rf dist",
diff --git a/e2e/pnpm-lock.yaml b/e2e/pnpm-lock.yaml
index 9bc3446e..8469cdbb 100644
--- a/e2e/pnpm-lock.yaml
+++ b/e2e/pnpm-lock.yaml
@@ -1361,18 +1361,51 @@ importers:
         specifier: ^2.39.3
         version: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@4.1.12)
     devDependencies:
+      '@eslint/js':
+        specifier: ^9.24.0
+        version: 9.38.0
       '@types/node':
         specifier: ^22.13.4
         version: 22.16.0
+      '@typescript-eslint/eslint-plugin':
+        specifier: ^8.29.1
+        version: 8.48.0(@typescript-eslint/parser@8.48.0(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3))(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3)
+      '@typescript-eslint/parser':
+        specifier: ^8.29.1
+        version: 8.48.0(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3)
+      eslint:
+        specifier: ^9.24.0
+        version: 9.38.0(jiti@1.21.7)
+      eslint-plugin-import:
+        specifier: ^2.31.0
+        version: 2.32.0(@typescript-eslint/parser@8.48.0(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3))(eslint-import-resolver-typescript@3.10.1)(eslint@9.38.0(jiti@1.21.7))
+      eslint-plugin-jsdoc:
+        specifier: ^50.6.9
+        version: 50.8.0(eslint@9.38.0(jiti@1.21.7))
+      eslint-plugin-prettier:
+        specifier: ^5.2.6
+        version: 5.5.4(eslint@9.38.0(jiti@1.21.7))(prettier@3.5.2)
+      prettier:
+        specifier: 3.5.2
+        version: 3.5.2
       tsup:
-        specifier: ^8.0.0
+        specifier: ^8.4.0
         version: 8.5.0(jiti@1.21.7)(postcss@8.5.6)(tsx@4.20.3)(typescript@5.8.3)(yaml@2.8.1)
+      tsx:
+        specifier: ^4.19.2
+        version: 4.20.3
       typescript:
-        specifier: ^5.0.0
+        specifier: ^5.7.3
         version: 5.8.3
+      vite:
+        specifier: ^6.2.6
+        version: 6.4.1(@types/node@22.16.0)(jiti@1.21.7)(tsx@4.20.3)(yaml@2.8.1)
+      vite-tsconfig-paths:
+        specifier: ^5.1.4
+        version: 5.1.4(typescript@5.8.3)(vite@6.4.1(@types/node@22.16.0)(jiti@1.21.7)(tsx@4.20.3)(yaml@2.8.1))
       vitest:
-        specifier: ^1.0.0
-        version: 1.6.1(@types/node@22.16.0)(jsdom@26.1.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))
+        specifier: ^3.0.5
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.16.0)(jiti@1.21.7)(jsdom@26.1.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(tsx@4.20.3)(yaml@2.8.1)
 
   ../typescript/packages/x402-deprecated:
     dependencies:
@@ -1585,6 +1618,104 @@ importers:
         specifier: ^5.3.0
         version: 5.8.3
 
+  coinbase/facilitators/typescript:
+    dependencies:
+      '@x402/core':
+        specifier: ^2.6.0
+        version: 2.6.0
+      '@x402/evm':
+        specifier: ^2.6.0
+        version: 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)
+      '@x402/extensions':
+        specifier: ^2.6.0
+        version: 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)
+      dotenv:
+        specifier: ^16.4.5
+        version: 16.6.1
+      express:
+        specifier: ^4.19.2
+        version: 4.21.2
+      viem:
+        specifier: ^2.21.54
+        version: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@4.1.12)
+    devDependencies:
+      '@types/express':
+        specifier: ^4.17.21
+        version: 4.17.23
+      '@types/node':
+        specifier: ^22.10.1
+        version: 22.16.0
+      eslint:
+        specifier: ^9.15.0
+        version: 9.38.0(jiti@1.21.7)
+      prettier:
+        specifier: ^3.3.3
+        version: 3.5.2
+      tsx:
+        specifier: ^4.19.2
+        version: 4.20.3
+      typescript:
+        specifier: ^5.7.2
+        version: 5.8.3
+
+  coinbase/servers/express:
+    dependencies:
+      '@x402/core':
+        specifier: ^2.6.0
+        version: 2.6.0
+      '@x402/evm':
+        specifier: ^2.6.0
+        version: 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)
+      '@x402/express':
+        specifier: ^2.6.0
+        version: 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(express@4.21.2)(typescript@5.8.3)(utf-8-validate@5.0.10)
+      '@x402/extensions':
+        specifier: ^2.6.0
+        version: 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)
+      dotenv:
+        specifier: ^16.6.1
+        version: 16.6.1
+      express:
+        specifier: ^4.18.2
+        version: 4.21.2
+    devDependencies:
+      '@eslint/js':
+        specifier: ^9.24.0
+        version: 9.38.0
+      '@types/express':
+        specifier: ^5.0.1
+        version: 5.0.3
+      '@typescript-eslint/eslint-plugin':
+        specifier: ^8.29.1
+        version: 8.48.0(@typescript-eslint/parser@8.48.0(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3))(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3)
+      '@typescript-eslint/parser':
+        specifier: ^8.29.1
+        version: 8.48.0(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3)
+      eslint:
+        specifier: ^9.24.0
+        version: 9.38.0(jiti@1.21.7)
+      eslint-plugin-import:
+        specifier: ^2.31.0
+        version: 2.32.0(@typescript-eslint/parser@8.48.0(eslint@9.38.0(jiti@1.21.7))(typescript@5.8.3))(eslint-import-resolver-typescript@3.10.1)(eslint@9.38.0(jiti@1.21.7))
+      eslint-plugin-jsdoc:
+        specifier: ^50.6.9
+        version: 50.8.0(eslint@9.38.0(jiti@1.21.7))
+      eslint-plugin-prettier:
+        specifier: ^5.2.6
+        version: 5.5.4(eslint@9.38.0(jiti@1.21.7))(prettier@3.5.2)
+      prettier:
+        specifier: 3.5.2
+        version: 3.5.2
+      tsup:
+        specifier: ^7.2.0
+        version: 7.3.0(postcss@8.5.6)(typescript@5.8.3)
+      tsx:
+        specifier: ^4.7.0
+        version: 4.20.3
+      typescript:
+        specifier: ^5.3.0
+        version: 5.8.3
+
   facilitators/typescript:
     dependencies:
       '@aptos-labs/ts-sdk':
@@ -5989,6 +6120,24 @@ packages:
   '@walletconnect/window-metadata@1.0.1':
     resolution: {integrity: sha512-9koTqyGrM2cqFRW517BPY/iEtUDx2r1+Pwwu5m7sJ7ka79wi3EyqhqcICk/yDmv6jAS1rjKgTKXlEhanYjijcA==}
 
+  '@x402/core@2.6.0':
+    resolution: {integrity: sha512-ISC/JeVss6xlKvor2rp18tJf9K5OQlIDDfZW1VZJQGDI2F4gy+HWxxkFfcQalCsPp4YUlwqh0YOkUxP+LTZWVg==}
+
+  '@x402/evm@2.6.0':
+    resolution: {integrity: sha512-wPkNHf483gie1Up2sJSvERnW+VIEvMoT1KRXr09wSoSWgelglsJm+ug3gPPXKnT3C6AcmNAKZ12rBnu9Paff7g==}
+
+  '@x402/express@2.6.0':
+    resolution: {integrity: sha512-Y7If4JD86/z+EpcvlS25REhOutww3O87B4/KBdePC2T+gLIZIjFK0/L8+3wgFINait6276y1FQEMoyNSuM2Gbg==}
+    peerDependencies:
+      '@x402/paywall': 2.6.0
+      express: ^4.0.0 || ^5.0.0
+    peerDependenciesMeta:
+      '@x402/paywall':
+        optional: true
+
+  '@x402/extensions@2.6.0':
+    resolution: {integrity: sha512-aLY9xAOOiRLKDN9HT2r9TYUXbD+IsoBces9qPZNVJGO2TBi2rfmbIBc3pcKCtWKn3iTvG2QFr3gpOFdpJRzqww==}
+
   abitype@1.0.6:
     resolution: {integrity: sha512-MMSqYh4+C/aVqI2RQaWqbvI4Kxo5cQV40WQ4QFtDnNzCkqChm8MuENhElmynZlO0qUy/ObkEUaXtKqYnx1Kp3A==}
     peerDependencies:
@@ -10923,7 +11072,7 @@ snapshots:
       jose: 6.1.3
       md5: 2.3.0
       uncrypto: 0.1.3
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       zod: 3.25.71
     transitivePeerDependencies:
       - bufferutil
@@ -10937,9 +11086,9 @@ snapshots:
   '@coinbase/onchainkit@0.38.19(@farcaster/miniapp-sdk@0.2.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(bufferutil@4.0.9)(react-dom@19.2.1(react@19.2.1))(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(zod@3.25.71)':
     dependencies:
       '@farcaster/frame-sdk': 0.1.12(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
-      '@farcaster/miniapp-wagmi-connector': 1.1.0(@farcaster/miniapp-sdk@0.2.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
+      '@farcaster/miniapp-wagmi-connector': 1.1.0(@farcaster/miniapp-sdk@0.2.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
       '@tanstack/react-query': 5.90.8(react@19.2.1)
-      '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
+      '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
       clsx: 2.1.1
       graphql: 16.11.0
       graphql-request: 6.1.0(graphql@16.11.0)
@@ -10947,8 +11096,8 @@ snapshots:
       react: 19.2.1
       react-dom: 19.2.1(react@19.2.1)
       tailwind-merge: 2.6.0
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
-      wagmi: 2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      wagmi: 2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71)
     transitivePeerDependencies:
       - '@azure/app-configuration'
       - '@azure/cosmos'
@@ -11418,11 +11567,11 @@ snapshots:
       - utf-8-validate
       - zod
 
-  '@farcaster/miniapp-wagmi-connector@1.1.0(@farcaster/miniapp-sdk@0.2.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))':
+  '@farcaster/miniapp-wagmi-connector@1.1.0(@farcaster/miniapp-sdk@0.2.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))':
     dependencies:
       '@farcaster/miniapp-sdk': 0.2.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
 
   '@farcaster/quick-auth@0.0.6(typescript@5.8.3)':
     dependencies:
@@ -11467,11 +11616,11 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@gemini-wallet/core@0.2.0(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))':
+  '@gemini-wallet/core@0.2.0(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))':
     dependencies:
       '@metamask/rpc-errors': 7.0.2
       eventemitter3: 5.0.1
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
     transitivePeerDependencies:
       - supports-color
 
@@ -15358,19 +15507,19 @@ snapshots:
       - wagmi
       - zod
 
-  '@wagmi/connectors@6.1.0(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71))(zod@3.25.71)':
+  '@wagmi/connectors@6.1.0(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71))(zod@3.25.71)':
     dependencies:
       '@base-org/account': 1.1.1(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(zod@3.25.71)
       '@coinbase/wallet-sdk': 4.3.6(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(zod@3.25.71)
-      '@gemini-wallet/core': 0.2.0(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
+      '@gemini-wallet/core': 0.2.0(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
       '@metamask/sdk': 0.33.1(bufferutil@4.0.9)(utf-8-validate@5.0.10)
       '@safe-global/safe-apps-provider': 0.18.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       '@safe-global/safe-apps-sdk': 9.1.0(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
       '@walletconnect/ethereum-provider': 2.21.1(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       cbw-sdk: '@coinbase/wallet-sdk@3.9.3'
-      porto: 0.2.19(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71))
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      porto: 0.2.19(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71))
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
     optionalDependencies:
       typescript: 5.8.3
     transitivePeerDependencies:
@@ -15435,11 +15584,11 @@ snapshots:
       - react
       - use-sync-external-store
 
-  '@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))':
+  '@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))':
     dependencies:
       eventemitter3: 5.0.1
       mipd: 0.0.7(typescript@5.8.3)
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       zustand: 5.0.0(@types/react@19.2.2)(react@19.2.1)(use-sync-external-store@1.4.0(react@19.2.1))
     optionalDependencies:
       '@tanstack/query-core': 5.90.8
@@ -16038,6 +16187,50 @@ snapshots:
       '@walletconnect/window-getters': 1.0.1
       tslib: 1.14.1
 
+  '@x402/core@2.6.0':
+    dependencies:
+      zod: 3.25.71
+
+  '@x402/evm@2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)':
+    dependencies:
+      '@x402/core': 2.6.0
+      '@x402/extensions': 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      zod: 3.25.71
+    transitivePeerDependencies:
+      - bufferutil
+      - ethers
+      - typescript
+      - utf-8-validate
+
+  '@x402/express@2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(express@4.21.2)(typescript@5.8.3)(utf-8-validate@5.0.10)':
+    dependencies:
+      '@x402/core': 2.6.0
+      '@x402/extensions': 2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)
+      express: 4.21.2
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      zod: 3.25.71
+    transitivePeerDependencies:
+      - bufferutil
+      - ethers
+      - typescript
+      - utf-8-validate
+
+  '@x402/extensions@2.6.0(bufferutil@4.0.9)(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(typescript@5.8.3)(utf-8-validate@5.0.10)':
+    dependencies:
+      '@scure/base': 1.2.6
+      '@x402/core': 2.6.0
+      ajv: 8.17.1
+      siwe: 2.3.2(ethers@6.16.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))
+      tweetnacl: 1.0.3
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      zod: 3.25.71
+    transitivePeerDependencies:
+      - bufferutil
+      - ethers
+      - typescript
+      - utf-8-validate
+
   abitype@1.0.6(typescript@5.8.3)(zod@3.25.71):
     optionalDependencies:
       typescript: 5.8.3
@@ -19196,14 +19389,14 @@ snapshots:
       - immer
       - use-sync-external-store
 
-  porto@0.2.19(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71)):
+  porto@0.2.19(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71)):
     dependencies:
       '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
       hono: 4.10.2
       idb-keyval: 6.2.2
       mipd: 0.0.7(typescript@5.8.3)
       ox: 0.9.12(typescript@5.8.3)(zod@4.1.12)
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
       zod: 4.1.12
       zustand: 5.0.8(@types/react@19.2.2)(react@19.2.1)(use-sync-external-store@1.4.0(react@19.2.1))
     optionalDependencies:
@@ -20631,24 +20824,6 @@ snapshots:
       - supports-color
       - terser
 
-  vite-node@1.6.1(@types/node@22.16.0):
-    dependencies:
-      cac: 6.7.14
-      debug: 4.4.3
-      pathe: 1.1.2
-      picocolors: 1.1.1
-      vite: 5.4.21(@types/node@22.16.0)
-    transitivePeerDependencies:
-      - '@types/node'
-      - less
-      - lightningcss
-      - sass
-      - sass-embedded
-      - stylus
-      - sugarss
-      - supports-color
-      - terser
-
   vite-node@3.2.4(@types/node@22.16.0)(jiti@1.21.7)(tsx@4.20.3)(yaml@2.8.1):
     dependencies:
       cac: 6.7.14
@@ -20690,15 +20865,6 @@ snapshots:
       '@types/node': 20.19.4
       fsevents: 2.3.3
 
-  vite@5.4.21(@types/node@22.16.0):
-    dependencies:
-      esbuild: 0.21.5
-      postcss: 8.5.6
-      rollup: 4.52.5
-    optionalDependencies:
-      '@types/node': 22.16.0
-      fsevents: 2.3.3
-
   vite@6.4.1(@types/node@22.16.0)(jiti@1.21.7)(tsx@4.20.3)(yaml@2.8.1):
     dependencies:
       esbuild: 0.25.5
@@ -20749,41 +20915,6 @@ snapshots:
       - supports-color
       - terser
 
-  vitest@1.6.1(@types/node@22.16.0)(jsdom@26.1.0(bufferutil@4.0.9)(utf-8-validate@5.0.10)):
-    dependencies:
-      '@vitest/expect': 1.6.1
-      '@vitest/runner': 1.6.1
-      '@vitest/snapshot': 1.6.1
-      '@vitest/spy': 1.6.1
-      '@vitest/utils': 1.6.1
-      acorn-walk: 8.3.5
-      chai: 4.5.0
-      debug: 4.4.3
-      execa: 8.0.1
-      local-pkg: 0.5.1
-      magic-string: 0.30.19
-      pathe: 1.1.2
-      picocolors: 1.1.1
-      std-env: 3.10.0
-      strip-literal: 2.1.1
-      tinybench: 2.9.0
-      tinypool: 0.8.4
-      vite: 5.4.21(@types/node@22.16.0)
-      vite-node: 1.6.1(@types/node@22.16.0)
-      why-is-node-running: 2.3.0
-    optionalDependencies:
-      '@types/node': 22.16.0
-      jsdom: 26.1.0(bufferutil@4.0.9)(utf-8-validate@5.0.10)
-    transitivePeerDependencies:
-      - less
-      - lightningcss
-      - sass
-      - sass-embedded
-      - stylus
-      - sugarss
-      - supports-color
-      - terser
-
   vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.16.0)(jiti@1.21.7)(jsdom@26.1.0(bufferutil@4.0.9)(utf-8-validate@5.0.10))(tsx@4.20.3)(yaml@2.8.1):
     dependencies:
       '@types/chai': 5.2.3
@@ -20909,14 +21040,14 @@ snapshots:
       - utf-8-validate
       - zod
 
-  wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71):
+  wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71):
     dependencies:
       '@tanstack/react-query': 5.90.8(react@19.2.1)
-      '@wagmi/connectors': 6.1.0(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71))(zod@3.25.71)
-      '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
+      '@wagmi/connectors': 6.1.0(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(@wagmi/core@2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)))(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(utf-8-validate@5.0.10)(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(wagmi@2.18.2(@tanstack/query-core@5.90.8)(@tanstack/react-query@5.90.8(react@19.2.1))(@types/react@19.2.2)(bufferutil@4.0.9)(react@19.2.1)(typescript@5.8.3)(utf-8-validate@5.0.10)(viem@2.31.6(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))(zod@3.25.71))(zod@3.25.71)
+      '@wagmi/core': 2.22.1(@tanstack/query-core@5.90.8)(@types/react@19.2.2)(react@19.2.1)(typescript@5.8.3)(use-sync-external-store@1.4.0(react@19.2.1))(viem@2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71))
       react: 19.2.1
       use-sync-external-store: 1.4.0(react@19.2.1)
-      viem: 2.45.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
+      viem: 2.47.1(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@3.25.71)
     optionalDependencies:
       typescript: 5.8.3
     transitivePeerDependencies:
diff --git a/e2e/pnpm-workspace.yaml b/e2e/pnpm-workspace.yaml
index 190cf9d2..144a752f 100644
--- a/e2e/pnpm-workspace.yaml
+++ b/e2e/pnpm-workspace.yaml
@@ -7,6 +7,8 @@ packages:
   - "clients/external/*"
   - "legacy/servers/*"
   - "legacy/clients/*"
+  - "coinbase/servers/*"
+  - "coinbase/facilitators/*"
   - "../typescript/packages/*"
   - "../typescript/packages/http/*"
   - "../typescript/packages/mechanisms/*"
diff --git a/e2e/setup.sh b/e2e/setup.sh
index 05233b9d..1f04a3f3 100755
--- a/e2e/setup.sh
+++ b/e2e/setup.sh
@@ -3,6 +3,7 @@ set -e
 
 # Parse command line arguments
 INCLUDE_LEGACY=false
+INCLUDE_COINBASE=false
 VERBOSE=false
 
 for arg in "$@"; do
@@ -11,6 +12,10 @@ for arg in "$@"; do
       INCLUDE_LEGACY=true
       shift
       ;;
+    --coinbase)
+      INCLUDE_COINBASE=true
+      shift
+      ;;
     -v|--verbose)
       VERBOSE=true
       shift
@@ -22,12 +27,14 @@ for arg in "$@"; do
       echo ""
       echo "Options:"
       echo "  --legacy         Include legacy (v1) implementations"
+      echo "  --coinbase       Include coinbase implementations"
       echo "  -v, --verbose    Show detailed output"
       echo "  -h, --help       Show this help message"
       echo ""
       echo "Examples:"
       echo "  ./setup.sh                  # Setup v2 implementations only"
       echo "  ./setup.sh --legacy         # Setup v2 and legacy"
+      echo "  ./setup.sh --coinbase       # Setup v2 and coinbase"
       echo "  ./setup.sh --legacy -v      # Setup with verbose output"
       exit 0
       ;;
@@ -43,6 +50,11 @@ if [ "$INCLUDE_LEGACY" = true ]; then
   echo ""
 fi
 
+if [ "$INCLUDE_COINBASE" = true ]; then
+  echo "📚 Including coinbase implementations"
+  echo ""
+fi
+
 # Track results
 TOTAL=0
 SUCCESS=0
@@ -159,6 +171,13 @@ if [ "$INCLUDE_LEGACY" = true ]; then
   process_directory "legacy/facilitators" "facilitator"
 fi
 
+# Setup coinbase if requested
+if [ "$INCLUDE_COINBASE" = true ]; then
+  process_directory "coinbase/servers" "server"
+  process_directory "coinbase/clients" "client"
+  process_directory "coinbase/facilitators" "facilitator"
+fi
+
 # Print summary
 echo ""
 echo ""
diff --git a/e2e/src/discovery.ts b/e2e/src/discovery.ts
index 3e21f682..2950367b 100644
--- a/e2e/src/discovery.ts
+++ b/e2e/src/discovery.ts
@@ -16,10 +16,12 @@ import {
 export class TestDiscovery {
   private baseDir: string;
   private includeLegacy: boolean;
+  private includeCoinbase: boolean;
 
-  constructor(baseDir: string = '.', includeLegacy: boolean = false) {
+  constructor(baseDir: string = '.', includeLegacy: boolean = false, includeCoinbase: boolean = true) {
     this.baseDir = baseDir;
     this.includeLegacy = includeLegacy;
+    this.includeCoinbase = includeCoinbase;
   }
 
   /**
@@ -42,6 +44,14 @@ export class TestDiscovery {
       }
     }
 
+    // Discover servers from coinbase directory if flag is set
+    if (this.includeCoinbase) {
+      const coinbaseServersDir = join(this.baseDir, 'coinbase', 'servers');
+      if (existsSync(coinbaseServersDir)) {
+        this.discoverServersInDirectory(coinbaseServersDir, servers, 'coinbase-');
+      }
+    }
+
     return servers;
   }
 
@@ -97,6 +107,14 @@ export class TestDiscovery {
       }
     }
 
+    // Discover clients from coinbase directory if flag is set
+    if (this.includeCoinbase) {
+      const coinbaseClientsDir = join(this.baseDir, 'coinbase', 'clients');
+      if (existsSync(coinbaseClientsDir)) {
+        this.discoverClientsInDirectory(coinbaseClientsDir, clients, 'coinbase-');
+      }
+    }
+
     return clients;
   }
 
@@ -120,6 +138,14 @@ export class TestDiscovery {
       }
     }
 
+    // Discover facilitators from coinbase directory if flag is set
+    if (this.includeCoinbase) {
+      const coinbaseFacilitatorsDir = join(this.baseDir, 'coinbase', 'facilitators');
+      if (existsSync(coinbaseFacilitatorsDir)) {
+        this.discoverFacilitatorsInDirectory(coinbaseFacilitatorsDir, facilitators, 'coinbase-');
+      }
+    }
+
     return facilitators;
   }
 
@@ -330,6 +356,9 @@ export class TestDiscovery {
     if (this.includeLegacy) {
       log('🔄 Legacy mode enabled - including legacy implementations');
     }
+    if (this.includeCoinbase) {
+      log('🔄 Coinbase mode enabled - including coinbase implementations');
+    }
     log(`📡 Servers found: ${servers.length}`);
     servers.forEach(server => {
       const paidEndpoints = server.config.endpoints?.filter(e => e.requiresPayment).length || 0;