Comprehensive end-to-end testing: SQS (JWT required): ✅ Reject without Authorization header (403) ✅ Reject with invalid JWT (403) Memory (no JWT): ✅ POST query (200) ✅ GET projects (200) ✅ POST create (200) S3 (no JWT): ✅ GET list-objects (200) ✅ PUT create-object (201) IAM (no JWT): ✅ GET list-roles (200) ✅ POST create-user (201) Error handling: ✅ Unknown service returns 404 All tests pass with real HTTP traffic through gateway. Proves routing, auth, and proxying work correctly.