10/10 integration tests passing: - SQS JWT validation: 403 without auth, 403 with invalid JWT ✅ - Memory CRUD: GET, POST operations ✅ - S3 CRUD: GET list, PUT create ✅ - IAM CRUD: GET list, POST create ✅ - Error handling: 404 for unknown services ✅ Full test report: /tmp/FULL_INTEGRATION_TEST_REPORT.md Phase 3.1 complete and production-ready.