diff --git a/packages/atxp-client/package.json b/packages/atxp-client/package.json
index 69895ba..1025892 100644
--- a/packages/atxp-client/package.json
+++ b/packages/atxp-client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@atxp/client",
-  "version": "0.11.10",
+  "version": "0.11.12",
   "description": "ATXP Client - MCP client with OAuth authentication and payment processing",
   "license": "MIT",
   "repository": {
@@ -33,8 +33,8 @@
     "pack:dry": "npm pack --dry-run"
   },
   "dependencies": {
-    "@atxp/common": "0.11.10",
-    "@atxp/mpp": "0.11.10",
+    "@atxp/common": "0.11.11",
+    "@atxp/mpp": "0.11.11",
     "@modelcontextprotocol/sdk": "^1.15.0",
     "@x402/core": "^2.9.0",
     "@x402/evm": "^2.9.0",
diff --git a/packages/atxp-client/src/atxpAccountHandler.test.ts b/packages/atxp-client/src/atxpAccountHandler.test.ts
index d47c6d9..b1ac67d 100644
--- a/packages/atxp-client/src/atxpAccountHandler.test.ts
+++ b/packages/atxp-client/src/atxpAccountHandler.test.ts
@@ -55,14 +55,17 @@ describe('ATXPAccountHandler', () => {
   });
 
   describe('handlePaymentChallenge', () => {
-    it('delegates to account.authorize() and retries with payment header', async () => {
+    it('delegates to account.authorize() and retries with payment and lifecycle headers', async () => {
       const authorize = vi.fn().mockResolvedValue({ protocol: 'atxp', credential: '{"token":"abc"}' });
       const account = createMockAccount({ authorize });
       const retryResponse = new Response('paid', { status: 200 });
       const fetchFn = vi.fn().mockResolvedValue(retryResponse);
       const config = createMockConfig({ account, fetchFn });
 
-      const response = make402Response({ chargeAmount: '0.01' });
+      const response = make402Response({
+        chargeAmount: '0.01',
+        paymentRequestId: 'pr_lifecycle_123',
+      });
       const result = await handler.handlePaymentChallenge(
         response,
         { url: 'https://example.com/api' },
@@ -77,6 +80,10 @@ describe('ATXPAccountHandler', () => {
         }),
       );
       expect(fetchFn).toHaveBeenCalledTimes(1);
+      const retryInit = fetchFn.mock.calls[0][1] as RequestInit;
+      const retryHeaders = retryInit.headers as Headers;
+      expect(retryHeaders.get('X-ATXP-PAYMENT')).toBe('{"token":"abc"}');
+      expect(retryHeaders.get('X-ATXP-Payment-Request-Id')).toBe('pr_lifecycle_123');
       expect(result).toBe(retryResponse);
     });
 
diff --git a/packages/atxp-client/src/atxpAccountHandler.ts b/packages/atxp-client/src/atxpAccountHandler.ts
index 021adb3..8311ffc 100644
--- a/packages/atxp-client/src/atxpAccountHandler.ts
+++ b/packages/atxp-client/src/atxpAccountHandler.ts
@@ -91,6 +91,10 @@ export class ATXPAccountHandler implements ProtocolHandler {
 
     // Map the returned protocol to the correct HTTP header
     const retryHeaders = buildPaymentHeaders(result, originalRequest.init?.headers);
+    const paymentRequestId = challengeData.paymentRequestId;
+    if (typeof paymentRequestId === 'string' && paymentRequestId) {
+      retryHeaders.set('X-ATXP-Payment-Request-Id', paymentRequestId);
+    }
     const retryInit: RequestInit = { ...originalRequest.init, headers: retryHeaders };
 
     return fetchFn(originalRequest.url, retryInit);