3785933 - HTTP 405 Error in SAP Traceability Hub

•    Message fails in CPI with AhcOperationFailedException
•    HTTP 405 – Method Not Allowed returned while calling customer callback URL
•    No successful response from external system
•    Message processing stops at the receiver communication step.
•    Error logs show response code 405 from the target endpoint.
•    Callback requests are rejected immediately by the target server.
•    Multiple message retries, if configured, fail with the same error.
•    No business document or payload is processed in the customer system.
•    Traceability Hub events remain incomplete due to callback failure.
•    The endpoint is reachable, but the requested HTTP method is not accepted.
•    Integration flow execution fails despite successful authentication and network connectivity.
•    Customer API gateway or web server logs may show method validation or endpoint restriction errors.

SAP Traceability Hub

HTTP 405 indicates multiple possible reasons for failure:
•    Incorrect HTTP method used (GET/POST/PUT mismatch)
•    Customer callback URL does not support the invoked method
•    Incorrect or incomplete endpoint/resource path
•    Missing or incorrect HTTP headers
•    API gateway or server restrictions blocking the method
•    Authentication/authorization misconfiguration leading to method rejection
•    Incorrect payload format for the selected method

1. Check CPI message/service logs for request details
2. Share logs with customer for validation
3. Verify supported HTTP methods in customer API documentation
4. Validate callback URL, headers, and payload structure
5. Review customer web service logs for detailed root cause
6. Correct HTTP method/configuration and redeploy iFlow

HTTP 405, AhcOperationFailedException, Callback URL, SAP CPI, SAP Traceability Hub, Method Not Allowed, API error, web service logs , KBA , IS-LS-ICH-OBT , ICH Onboarding , How To