diff --git a/frontend/src/components/TokenPicker.jsx b/frontend/src/components/TokenPicker.jsx
index 5d3fe892..3147cd4d 100644
--- a/frontend/src/components/TokenPicker.jsx
+++ b/frontend/src/components/TokenPicker.jsx
@@ -12,7 +12,7 @@ import {
 import { cn } from "@/lib/utils";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
-import { useTokenList } from "../hooks/useTokenList";
+import { ChainIdToName, useTokenList, isTestnet } from "../hooks/useTokenList";
 import { useTokenSearch } from "../hooks/useTokenSearch";
 import { CopyButton } from "./ui/copyButton";
 import { Avatar } from "./ui/avatar";
@@ -216,20 +216,22 @@ export function TokenPicker({
     setOpen(false);
   };
 
+  const isOnTestnet = isTestnet(chainId);
+
   return (
     <>
       <Button
-        type="button"
-        variant="outline"
-        disabled={disabled}
-        onClick={() => setOpen(true)}
-        className={cn(
-          "h-12 px-4 justify-between bg-white hover:bg-gray-50 border border-gray-300 text-gray-900",
-          "shadow-sm hover:shadow-md transition-all duration-200 hover:border-gray-400",
-          disabled && "opacity-50 cursor-not-allowed",
-          className
-        )}
-      >
+          type="button"
+          variant="outline"
+          disabled={disabled || isOnTestnet}
+          onClick={() => setOpen(true)}
+          className={cn(
+            "h-12 px-4 justify-between bg-white hover:bg-gray-50 border border-gray-300 text-gray-900",
+            "shadow-sm hover:shadow-md transition-all duration-200 hover:border-gray-400",
+            (disabled || isOnTestnet) && "opacity-50 cursor-not-allowed",
+            className
+          )}
+        >
         {selected ? (
           <div className="flex items-center gap-3">
             <Avatar
@@ -262,6 +264,15 @@ export function TokenPicker({
         <ChevronDown className="w-4 h-4 text-gray-500" />
       </Button>
 
+      {isOnTestnet && (
+        <div className="mt-2 flex items-start gap-2 p-3 bg-amber-50 border border-amber-200 rounded-lg">
+          <AlertCircle className="w-4 h-4 text-amber-600 flex-shrink-0 mt-0.5" />
+          <p className="text-sm text-amber-800">
+            Token selection is disabled on testnets. Please switch to a mainnet network to use this feature.
+          </p>
+        </div>
+      )}
+
       <Modal isOpen={open} onClose={() => setOpen(false)}>
         <div className="p-6">
           <div className="flex items-center gap-2 mb-4">
@@ -315,12 +326,37 @@ export function TokenPicker({
                 <div className="flex items-center justify-center py-12">
                   <div className="flex flex-col items-center gap-3 text-gray-500">
                     <AlertCircle className="w-8 h-8" />
-                    <span className="text-sm font-medium">
-                      Failed to load tokens
-                    </span>
-                    <span className="text-xs text-center max-w-[280px]">
-                      {tokensError}
-                    </span>
+                    {tokensError.includes("manually input") ? (
+                      <>
+                        <span className="text-sm font-medium">
+                          Testnet:{" "}
+                          {ChainIdToName[chainId] || "Unknown"} (
+                          {chainId})
+                        </span>
+                        <span className="text-xs text-center max-w-[280px]">
+                          Token Selection is not supported in testnets.
+                        </span>
+                        <span className="text-xs text-center max-w-[280px]">
+                          {tokensError}
+                        </span>
+                      </>
+                    ) : tokensError.includes("not supported") ? (
+                      <>
+                        <span className="text-sm font-medium">
+                          Chain Not Supported
+                        </span>
+                        <span className="text-xs text-center">{tokensError}</span>
+                      </>
+                    ) : (
+                      <>
+                        <span className="text-sm font-medium">
+                          Failed to load tokens
+                        </span>
+                        <span className="text-xs text-center max-w-[280px]">
+                          {tokensError}
+                        </span>
+                      </>
+                    )}
                   </div>
                 </div>
               ) : filteredTokens.length === 0 ? (
diff --git a/frontend/src/hooks/useTokenList.js b/frontend/src/hooks/useTokenList.js
index 9c42cf7b..af5e6edf 100644
--- a/frontend/src/hooks/useTokenList.js
+++ b/frontend/src/hooks/useTokenList.js
@@ -7,7 +7,7 @@ const tokenCache = {};
 const TESTNET_CHAIN_IDS = new Set([11155111, 5]); // Sepolia, Goerli
 
 // Helper function to check if a chain is testnet
-const isTestnet = (chainId) => TESTNET_CHAIN_IDS.has(chainId);
+export const isTestnet = (chainId) => TESTNET_CHAIN_IDS.has(chainId);
 
 export const ChainIdToName = {
   1: "ethereum",
@@ -25,6 +25,8 @@ export function useTokenList(chainId) {
       // Return cached tokens if available
       if (tokenCache[chainId]) {
         setTokens(tokenCache[chainId]);
+        setError(null);
+        setLoading(false);
         return;
       }