diff --git a/packages/integration-sdk-runtime/src/api/__tests__/index.test.ts b/packages/integration-sdk-runtime/src/api/__tests__/index.test.ts
index fdfc82516..cdd1d706c 100644
--- a/packages/integration-sdk-runtime/src/api/__tests__/index.test.ts
+++ b/packages/integration-sdk-runtime/src/api/__tests__/index.test.ts
@@ -143,3 +143,31 @@ describe('compressRequest', () => {
     expect(config.data).toEqual({ some: 'data' });
   });
 });
+
+describe('real Alpha request with fake API key', () => {
+  test('should not expose API key in error', async () => {
+    jest.resetModules();
+    jest.unmock('@lifeomic/alpha');
+
+    const { createApiClient, getApiBaseUrl } = require('../index');
+
+    const apiBaseUrl = getApiBaseUrl();
+
+    const client = createApiClient({
+      apiBaseUrl,
+      account: 'test-account',
+      accessToken: 'test-key',
+      retryOptions: {
+        maxTimeout: 20000,
+      },
+    });
+
+    try {
+      await client.post('/persister/synchronization/jobs/', { some: 'data' });
+    } catch (err: any) {
+      const errorString = JSON.stringify(err);
+
+      expect(errorString).not.toContain('test-key');
+    }
+  });
+});
diff --git a/packages/integration-sdk-runtime/src/api/index.ts b/packages/integration-sdk-runtime/src/api/index.ts
index 40a1eaa15..c1da355bb 100644
--- a/packages/integration-sdk-runtime/src/api/index.ts
+++ b/packages/integration-sdk-runtime/src/api/index.ts
@@ -60,6 +60,40 @@ export function createApiClient({
   };
 
   const client = new Alpha(opts) as ApiClient;
+
+  // Redact Authorization header from error response
+  client.interceptors?.response?.use(
+    (response) => response,
+    (error: any) => {
+      if (error?.config?.headers) {
+        error.config.headers = '[REDACTED]';
+      }
+
+      if (error?.response?.config?.headers) {
+        error.response.config.headers = '[REDACTED]';
+      }
+
+      if (typeof error?.request?._header === 'string') {
+        error.request._header = error.request._header.replace(
+          /Authorization: Bearer\s[^\r\n]+/i,
+          'Authorization: [REDACTED]',
+        );
+      }
+
+      const outHeadersSym = Object.getOwnPropertySymbols(
+        error.request || {},
+      ).find((sym) => String(sym).includes('kOutHeaders'));
+      if (outHeadersSym) {
+        const outHeaders = (error.request as any)[outHeadersSym];
+        if (outHeaders?.authorization) {
+          outHeaders.authorization = '[REDACTED]';
+        }
+      }
+
+      return Promise.reject(error);
+    },
+  );
+
   if (compressUploads) {
     // interceptors is incorrectly typed even without the case to ApiClient.
     // an AxiosInterceptor doesn't work here. You must use the AlphaInterceptor