diff --git a/typescript/packages/core/src/server/x402ResourceServer.ts b/typescript/packages/core/src/server/x402ResourceServer.ts
index 35b5f6ea9..6f8d73b05 100644
--- a/typescript/packages/core/src/server/x402ResourceServer.ts
+++ b/typescript/packages/core/src/server/x402ResourceServer.ts
@@ -168,6 +168,16 @@ export class x402ResourceServer {
     return this;
   }
 
+  /**
+   * Check if an extension is registered.
+   *
+   * @param key - The extension key
+   * @returns True if the extension is registered
+   */
+  hasExtension(key: string): boolean {
+    return this.registeredExtensions.has(key);
+  }
+
   /**
    * Enriches declared extensions using registered extension hooks.
    *
diff --git a/typescript/packages/http/express/src/index.ts b/typescript/packages/http/express/src/index.ts
index 071f981c8..ad04ff4ba 100644
--- a/typescript/packages/http/express/src/index.ts
+++ b/typescript/packages/http/express/src/index.ts
@@ -89,9 +89,10 @@ export function paymentMiddleware(
   // httpServer.initialize() fetches facilitator support and validates routes
   let initPromise: Promise<void> | null = syncFacilitatorOnStart ? httpServer.initialize() : null;
 
-  // Dynamically register bazaar extension if routes declare it
+  // Dynamically register bazaar extension if routes declare it and not already registered
+  // Skip if pre-registered (e.g., in serverless environments where static imports are used)
   let bazaarPromise: Promise<void> | null = null;
-  if (checkIfBazaarNeeded(routes)) {
+  if (checkIfBazaarNeeded(routes) && !server.hasExtension("bazaar")) {
     bazaarPromise = import("@x402/extensions/bazaar")
       .then(({ bazaarResourceServerExtension }) => {
         server.registerExtension(bazaarResourceServerExtension);
diff --git a/typescript/packages/http/hono/src/index.ts b/typescript/packages/http/hono/src/index.ts
index 8255c4cd1..1d4253593 100644
--- a/typescript/packages/http/hono/src/index.ts
+++ b/typescript/packages/http/hono/src/index.ts
@@ -89,9 +89,10 @@ export function paymentMiddleware(
   // httpServer.initialize() fetches facilitator support and validates routes
   let initPromise: Promise<void> | null = syncFacilitatorOnStart ? httpServer.initialize() : null;
 
-  // Dynamically register bazaar extension if routes declare it
+  // Dynamically register bazaar extension if routes declare it and not already registered
+  // Skip if pre-registered (e.g., in serverless environments where static imports are used)
   let bazaarPromise: Promise<void> | null = null;
-  if (checkIfBazaarNeeded(routes)) {
+  if (checkIfBazaarNeeded(routes) && !server.hasExtension("bazaar")) {
     bazaarPromise = import("@x402/extensions/bazaar")
       .then(({ bazaarResourceServerExtension }) => {
         server.registerExtension(bazaarResourceServerExtension);
diff --git a/typescript/packages/http/next/src/index.ts b/typescript/packages/http/next/src/index.ts
index 798ca1720..75fbe4431 100644
--- a/typescript/packages/http/next/src/index.ts
+++ b/typescript/packages/http/next/src/index.ts
@@ -65,9 +65,10 @@ export function paymentProxy(
 ) {
   const { httpServer, init } = createHttpServer(routes, server, paywall, syncFacilitatorOnStart);
 
-  // Dynamically register bazaar extension if routes declare it
+  // Dynamically register bazaar extension if routes declare it and not already registered
+  // Skip if pre-registered (e.g., in serverless environments where static imports are used)
   let bazaarPromise: Promise<void> | null = null;
-  if (checkIfBazaarNeeded(routes)) {
+  if (checkIfBazaarNeeded(routes) && !server.hasExtension("bazaar")) {
     bazaarPromise = import(/* webpackIgnore: true */ "@x402/extensions/bazaar")
       .then(({ bazaarResourceServerExtension }) => {
         server.registerExtension(bazaarResourceServerExtension);
@@ -220,9 +221,10 @@ export function withX402<T = unknown>(
   const routes = { "*": routeConfig };
   const { httpServer, init } = createHttpServer(routes, server, paywall, syncFacilitatorOnStart);
 
-  // Dynamically register bazaar extension if route declares it
+  // Dynamically register bazaar extension if route declares it and not already registered
+  // Skip if pre-registered (e.g., in serverless environments where static imports are used)
   let bazaarPromise: Promise<void> | null = null;
-  if (checkIfBazaarNeeded(routes)) {
+  if (checkIfBazaarNeeded(routes) && !server.hasExtension("bazaar")) {
     bazaarPromise = import(/* webpackIgnore: true */ "@x402/extensions/bazaar")
       .then(({ bazaarResourceServerExtension }) => {
         server.registerExtension(bazaarResourceServerExtension);