diff --git a/misc/examples/events/charge.http b/misc/examples/events/charge.http
new file mode 100644
index 0000000..7829a7a
--- /dev/null
+++ b/misc/examples/events/charge.http
@@ -0,0 +1,10 @@
+###
+POST http://localhost:8080/v1/stripe/charge
+Content-Type: application/json
+
+{
+  "token": "tok_visa",
+  "voucher": "abcg",
+  "amount": "650",
+  "currency": "USD"
+}
\ No newline at end of file
diff --git a/misc/examples/events/webhook.http b/misc/examples/events/webhook.http
new file mode 100644
index 0000000..a544d21
--- /dev/null
+++ b/misc/examples/events/webhook.http
@@ -0,0 +1,292 @@
+###
+POST http://localhost:8080/v1/stripe/webhook
+Content-Type: application/json
+
+{
+  "id": "evt_3Ls83eLswFpehDNg0dmzogyf",
+  "object": "event",
+  "api_version": "2022-08-01",
+  "created": 1665593127,
+  "data": {
+    "object": {
+      "id": "ch_3Ls83eLswFpehDNg0WVw0vTa",
+      "object": "charge",
+      "amount": 250,
+      "amount_captured": 250,
+      "amount_refunded": 0,
+      "application": null,
+      "application_fee": null,
+      "application_fee_amount": null,
+      "balance_transaction": "txn_3Ls83eLswFpehDNg0dFvPaKv",
+      "billing_details": {
+        "address": {
+          "city": null,
+          "country": "DE",
+          "line1": null,
+          "line2": null,
+          "postal_code": null,
+          "state": null
+        },
+        "email": "a@b.d",
+        "name": "asdfasf",
+        "phone": null
+      },
+      "calculated_statement_descriptor": "Stripe",
+      "captured": true,
+      "created": 1665593127,
+      "currency": "usd",
+      "customer": null,
+      "description": null,
+      "destination": null,
+      "dispute": null,
+      "disputed": false,
+      "failure_balance_transaction": null,
+      "failure_code": null,
+      "failure_message": null,
+      "fraud_details": {},
+      "invoice": null,
+      "livemode": false,
+      "metadata": {},
+      "on_behalf_of": null,
+      "order": null,
+      "outcome": {
+        "network_status": "approved_by_network",
+        "reason": null,
+        "risk_level": "normal",
+        "risk_score": 21,
+        "seller_message": "Payment complete.",
+        "type": "authorized"
+      },
+      "paid": true,
+      "payment_intent": "pi_3Ls83eLswFpehDNg0b2mAFUW",
+      "payment_method": "pm_1Ls83dLswFpehDNgpYAGL3j9",
+      "payment_method_details": {
+        "card": {
+          "brand": "mastercard",
+          "checks": {
+            "address_line1_check": null,
+            "address_postal_code_check": null,
+            "cvc_check": "pass"
+          },
+          "country": "US",
+          "exp_month": 12,
+          "exp_year": 2023,
+          "fingerprint": "DoAWRfUcyOfJupbL",
+          "funding": "credit",
+          "installments": null,
+          "last4": "4444",
+          "mandate": null,
+          "network": "mastercard",
+          "three_d_secure": null,
+          "wallet": null
+        },
+        "type": "card"
+      },
+      "receipt_email": null,
+      "receipt_number": null,
+      "receipt_url": "https://pay.stripe.com/receipts/payment/CAcaFwoVYWNjdF8xTGZORGFMc3dGcGVoRE5nKKjem5oGMgZo4m-xDMM6LBadftys-t7FIeo23hfQKTAtYI3zpLwmJb_3-A6VqCpIGjfmpkWUwCDQC38M",
+      "refunded": false,
+      "refunds": {
+        "object": "list",
+        "data": [],
+        "has_more": false,
+        "total_count": 0,
+        "url": "/v1/charges/ch_3Ls83eLswFpehDNg0WVw0vTa/refunds"
+      },
+      "review": null,
+      "shipping": null,
+      "source": null,
+      "source_transfer": null,
+      "statement_descriptor": null,
+      "statement_descriptor_suffix": null,
+      "status": "succeeded",
+      "transfer_data": null,
+      "transfer_group": null
+    }
+  },
+  "livemode": false,
+  "pending_webhooks": 2,
+  "request": {
+    "id": "req_F8pjOORr12gJT9",
+    "idempotency_key": "8fdd25c9-cb73-4807-973f-f0b21d8bb7cc"
+  },
+  "type": "charge.succeeded"
+}
+
+
+###
+POST http://localhost:8080/v1/stripe/webhook
+Content-Type: application/json
+
+{
+  "id": "evt_3Ls83eLswFpehDNg0YbJevK2",
+  "object": "event",
+  "api_version": "2022-08-01",
+  "created": 1665593128,
+  "data": {
+    "object": {
+      "id": "pi_3Ls83eLswFpehDNg0b2mAFUW",
+      "object": "payment_intent",
+      "amount": 250,
+      "amount_capturable": 0,
+      "amount_details": {
+        "tip": {}
+      },
+      "amount_received": 250,
+      "application": null,
+      "application_fee_amount": null,
+      "automatic_payment_methods": null,
+      "canceled_at": null,
+      "cancellation_reason": null,
+      "capture_method": "automatic",
+      "charges": {
+        "object": "list",
+        "data": [
+          {
+            "id": "ch_3Ls83eLswFpehDNg0WVw0vTa",
+            "object": "charge",
+            "amount": 250,
+            "amount_captured": 250,
+            "amount_refunded": 0,
+            "application": null,
+            "application_fee": null,
+            "application_fee_amount": null,
+            "balance_transaction": "txn_3Ls83eLswFpehDNg0dFvPaKv",
+            "billing_details": {
+              "address": {
+                "city": null,
+                "country": "DE",
+                "line1": null,
+                "line2": null,
+                "postal_code": null,
+                "state": null
+              },
+              "email": "a@b.d",
+              "name": "asdfasf",
+              "phone": null
+            },
+            "calculated_statement_descriptor": "Stripe",
+            "captured": true,
+            "created": 1665593127,
+            "currency": "usd",
+            "customer": null,
+            "description": null,
+            "destination": null,
+            "dispute": null,
+            "disputed": false,
+            "failure_balance_transaction": null,
+            "failure_code": null,
+            "failure_message": null,
+            "fraud_details": {},
+            "invoice": null,
+            "livemode": false,
+            "metadata": {},
+            "on_behalf_of": null,
+            "order": null,
+            "outcome": {
+              "network_status": "approved_by_network",
+              "reason": null,
+              "risk_level": "normal",
+              "risk_score": 21,
+              "seller_message": "Payment complete.",
+              "type": "authorized"
+            },
+            "paid": true,
+            "payment_intent": "pi_3Ls83eLswFpehDNg0b2mAFUW",
+            "payment_method": "pm_1Ls83dLswFpehDNgpYAGL3j9",
+            "payment_method_details": {
+              "card": {
+                "brand": "mastercard",
+                "checks": {
+                  "address_line1_check": null,
+                  "address_postal_code_check": null,
+                  "cvc_check": "pass"
+                },
+                "country": "US",
+                "exp_month": 12,
+                "exp_year": 2023,
+                "fingerprint": "DoAWRfUcyOfJupbL",
+                "funding": "credit",
+                "installments": null,
+                "last4": "4444",
+                "mandate": null,
+                "network": "mastercard",
+                "three_d_secure": null,
+                "wallet": null
+              },
+              "type": "card"
+            },
+            "receipt_email": null,
+            "receipt_number": null,
+            "receipt_url": "https://pay.stripe.com/receipts/payment/CAcaFwoVYWNjdF8xTGZORGFMc3dGcGVoRE5nKKjem5oGMgbvNEiopYo6LBaa9sMFbxpWzGb2WX9aOuc4LWzXH4hUaNoIgvdvHlJv5zChsx0FH0MJcj6b",
+            "refunded": false,
+            "refunds": {
+              "object": "list",
+              "data": [],
+              "has_more": false,
+              "total_count": 0,
+              "url": "/v1/charges/ch_3Ls83eLswFpehDNg0WVw0vTa/refunds"
+            },
+            "review": null,
+            "shipping": null,
+            "source": null,
+            "source_transfer": null,
+            "statement_descriptor": null,
+            "statement_descriptor_suffix": null,
+            "status": "succeeded",
+            "transfer_data": null,
+            "transfer_group": null
+          }
+        ],
+        "has_more": false,
+        "total_count": 1,
+        "url": "/v1/charges?payment_intent=pi_3Ls83eLswFpehDNg0b2mAFUW"
+      },
+      "client_secret": "pi_3Ls83eLswFpehDNg0b2mAFUW_secret_72eKxCUCTrTLH0E3dSvrlwmgO",
+      "confirmation_method": "automatic",
+      "created": 1665593126,
+      "currency": "usd",
+      "customer": null,
+      "description": null,
+      "invoice": null,
+      "last_payment_error": null,
+      "livemode": false,
+      "metadata": {},
+      "next_action": null,
+      "on_behalf_of": null,
+      "payment_method": "pm_1Ls83dLswFpehDNgpYAGL3j9",
+      "payment_method_options": {
+        "card": {
+          "installments": null,
+          "mandate_options": null,
+          "network": null,
+          "request_three_d_secure": "automatic"
+        }
+      },
+      "payment_method_types": [
+        "card"
+      ],
+      "processing": null,
+      "receipt_email": null,
+      "review": null,
+      "setup_future_usage": null,
+      "shipping": null,
+      "source": null,
+      "statement_descriptor": null,
+      "statement_descriptor_suffix": null,
+      "status": "succeeded",
+      "transfer_data": null,
+      "transfer_group": null
+    }
+  },
+  "livemode": false,
+  "pending_webhooks": 2,
+  "request": {
+    "id": "req_F8pjOORr12gJT9",
+    "idempotency_key": "8fdd25c9-cb73-4807-973f-f0b21d8bb7cc"
+  },
+  "type": "payment_intent.succeeded"
+}
+
+
+
diff --git a/nix/materialized.paymentserver/.stack-to-nix.cache b/nix/materialized.paymentserver/.stack-to-nix.cache
index 826f2b3..f0ac606 100644
--- a/nix/materialized.paymentserver/.stack-to-nix.cache
+++ b/nix/materialized.paymentserver/.stack-to-nix.cache
@@ -1 +1 @@
-https://github.com/PrivateStorageio/servant-prometheus.git 6c8430b802303f9b8a3d11acb0c212b80444ad7c . 09dcwj5ac2x2ilb4a0rai3qhl875vvvjr12af5plpz86faga3lnz servant-prometheus .stack-to-nix.cache.0
+https://github.com/PrivateStorageio/servant-prometheus.git 622eb77cb08c5f13729173b8feb123a6700ff91f . 09dcwj5ac2x2ilb4a0rai3qhl875vvvjr12af5plpz86faga3lnz servant-prometheus .stack-to-nix.cache.0
diff --git a/nix/materialized.paymentserver/.stack-to-nix.cache.0 b/nix/materialized.paymentserver/.stack-to-nix.cache.0
index 54253b1..086ae74 100644
--- a/nix/materialized.paymentserver/.stack-to-nix.cache.0
+++ b/nix/materialized.paymentserver/.stack-to-nix.cache.0
@@ -76,5 +76,5 @@
         };
       };
     } // rec {
-    src = (pkgs.lib).mkDefault /nix/store/g62jlfm3vg9dld12fi12f5rkp9sjgbab-servant-prometheus-6c8430b;
+    src = (pkgs.lib).mkDefault /nix/store/r537z0w0swb6calr6vkk2ppnqd2bgv8z-servant-prometheus-622eb77;
     }
diff --git a/nix/materialized.paymentserver/PaymentServer.nix b/nix/materialized.paymentserver/PaymentServer.nix
index a5702ec..842157c 100644
--- a/nix/materialized.paymentserver/PaymentServer.nix
+++ b/nix/materialized.paymentserver/PaymentServer.nix
@@ -142,4 +142,6 @@
           };
         };
       };
-    } // rec { src = (pkgs.lib).mkDefault ./.; }
\ No newline at end of file
+    } // rec {
+    src = (pkgs.lib).mkDefault ./.;
+    }
\ No newline at end of file
diff --git a/src/PaymentServer/Processors/Stripe.hs b/src/PaymentServer/Processors/Stripe.hs
index 07f2556..bb6c982 100644
--- a/src/PaymentServer/Processors/Stripe.hs
+++ b/src/PaymentServer/Processors/Stripe.hs
@@ -5,11 +5,13 @@
 {-# LANGUAGE ScopedTypeVariables #-}
 
 module PaymentServer.Processors.Stripe
-  ( StripeAPI
+  ( ChargesAPI
+  , WebhookAPI
   , Charges(Charges)
   , Acknowledgement(Ok)
   , Failure(Failure)
-  , stripeServer
+  , chargeServer
+  , webhookServer
   , getVoucher
   , charge
   ) where
@@ -29,12 +31,9 @@ import Control.Monad
   )
 import Data.Text
   ( Text
-  , unpack
   , concat
   )
-import Text.Read
-  ( readMaybe
-  )
+import Text.Read()
 
 import Network.HTTP.Types
   ( Status(Status)
@@ -43,6 +42,8 @@ import Network.HTTP.Types
   , status503
   )
 
+import Data.ByteString (ByteString)
+
 import Data.ByteString.UTF8
   ( toString
   )
@@ -68,12 +69,18 @@ import Servant.API
   , Post
   , (:>)
   )
+import Web.Stripe.Event
+  ( Event(Event, eventId, eventType, eventData)
+  , EventId(EventId)
+  , EventType(ChargeSucceededEvent)
+  , EventData(ChargeEvent)
+  )
 import Web.Stripe.Error
   ( StripeError(StripeError, errorType, errorMsg)
   , StripeErrorType(InvalidRequest, APIError, ConnectionFailure, CardError)
   )
 import Web.Stripe.Types
-  ( Charge(Charge, chargeId)
+  ( Charge(Charge, chargeId, chargeMetaData)
   , MetaData(MetaData)
   , Currency(USD)
   )
@@ -106,7 +113,7 @@ instance ToJSON Acknowledgement where
     [ "success" .= True
     ]
 
-type StripeAPI = ChargesAPI
+type WebhookAPI = "webhook" :> ReqBody '[JSON] Event :> Post '[JSON] Acknowledgement
 
 -- | getVoucher finds the metadata item with the key `"Voucher"` and returns
 -- the corresponding value, or Nothing.
@@ -115,10 +122,39 @@ getVoucher (MetaData []) = Nothing
 getVoucher (MetaData (("Voucher", value):xs)) = Just value
 getVoucher (MetaData (x:xs)) = getVoucher (MetaData xs)
 
-stripeServer :: VoucherDatabase d => StripeConfig -> d -> Server StripeAPI
-stripeServer stripeConfig d =
+chargeServer :: VoucherDatabase d => StripeConfig -> d -> Server ChargesAPI
+chargeServer stripeConfig d =
   withSuccessFailureMetrics chargeAttempts chargeSuccesses . charge stripeConfig d
 
+--stripeServer :: VoucherDatabase d => StripeSecretKey -> d -> Server StripeAPI
+--stripeServer key d = webhook d :<|> charge d key
+
+--webhookServer :: VoucherDatabase d => StripeConfig -> d -> ByteString -> Handler Acknowledgement
+--webhookServer stripeConfig d payload =
+
+
+-- | Process charge succeeded
+webhookServer :: VoucherDatabase d => StripeConfig -> d -> Event -> Handler Acknowledgement
+webhookServer stripeConfig d Event{eventId=Just (EventId eventId), eventType=ChargeSucceededEvent, eventData=(ChargeEvent charge)} =
+  case getVoucher $ chargeMetaData charge of
+    Nothing ->
+      -- TODO: Record the eventId somewhere.  In all cases where we don't
+      -- associate the value of the charge with something in our system, we
+      -- probably need enough information to issue a refund.  We're early
+      -- enough in the system here that refunds are possible and not even
+      -- particularly difficult.
+      return Ok
+    Just v  -> do
+      -- TODO: What if it is a duplicate payment?  payForVoucher should be
+      -- able to indicate error I guess.
+      _ <- liftIO $ payForVoucher d v (return $ Right $ chargeId charge)
+      return Ok
+
+-- Disregard anything else - but return success so that Stripe doesn't retry.
+webhook _ d _ =
+  -- TODO: Record the eventId somewhere.
+  return Ok
+
 -- | Browser facing API that takes token, voucher and a few other information
 -- and calls stripe charges API. If payment succeeds, then the voucher is stored
 -- in the voucher database.
@@ -175,6 +211,9 @@ withSuccessFailureMetrics attemptCount successCount op = do
 -- and if the Charge is okay, then set the voucher as "paid" in the database.
 charge :: VoucherDatabase d => StripeConfig -> d -> Charges -> Handler Acknowledgement
 charge stripeConfig d (Charges token voucher 650 USD) = do
+
+  -- TODO verify the webhook request as a first step
+
   result <- liftIO payForVoucher'
   case result of
     Left AlreadyPaid ->
diff --git a/src/PaymentServer/Server.hs b/src/PaymentServer/Server.hs
index 3c0c5ee..342888f 100644
--- a/src/PaymentServer/Server.hs
+++ b/src/PaymentServer/Server.hs
@@ -37,8 +37,10 @@ import Web.Stripe.Client
   )
 
 import PaymentServer.Processors.Stripe
-  ( StripeAPI
-  , stripeServer
+  ( ChargesAPI
+  , WebhookAPI
+  , chargeServer
+  , webhookServer
   )
 import PaymentServer.Redemption
   ( RedemptionConfig(RedemptionConfig)
@@ -58,14 +60,16 @@ import PaymentServer.Persistence
 
 -- | This is the complete type of the server API.
 type PaymentServerAPI
-  =    "v1" :> "stripe" :> StripeAPI
+  =    "v1" :> "stripe" :> ChargesAPI
+  :<|> "v1" :> "stripe" :> WebhookAPI
   :<|> "v1" :> "redeem" :> RedemptionAPI
   :<|> MetricsAPI
 
 -- | Create a server which uses the given database.
 paymentServer :: VoucherDatabase d => StripeConfig -> RedemptionConfig -> d -> Server PaymentServerAPI
 paymentServer stripeConfig redemptionConfig database =
-  stripeServer stripeConfig database
+  chargeServer stripeConfig database
+  :<|> webhookServer stripeConfig database
   :<|> redemptionServer redemptionConfig database
   :<|> metricsServer
 
diff --git a/stack.yaml b/stack.yaml
index 45a5364..58510fc 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -38,10 +38,11 @@ packages:
 # using the same syntax as the packages field.
 # (e.g., acme-missiles-0.3)
 extra-deps:
+  - "network-3.1.2.7"
   - github: "PrivateStorageio/servant-prometheus"
     commit: "622eb77cb08c5f13729173b8feb123a6700ff91f"
     # https://input-output-hk.github.io/haskell.nix/tutorials/source-repository-hashes/#stack
-    # nix-sha256: 09dcwj5ac2x2ilb4a0rai3qhl875vvvjr12af5plpz86faga3lnz
+    # nix-sha256: 39KhnnIG/UtvcUqELPfe5SAK8YgqA0UWjaILporkrCU=
 
 # Override default flag values for local packages and extra-deps
 # flags: {}