400 | bad_request | Fix the request body or parameters. The message says what’s wrong. |
401 | unauthorized | Check the Authorization header. The token is missing, invalid, or expired. |
403 | forbidden | Add the endpoint’s scope to the token. |
404 | not_found | Check the ID in the path. |
409 | conflict | The resource isn’t in a state that allows this, for example a conversation that’s still processing or already escalated. |
429 | rate_limited | Wait the Retry-After seconds, then retry. See rate limits. |
500 | internal_error | Retry with backoff. If it keeps failing, email support with the Request-Id header. |