OPDC API error code

IDEMPOTENCY_KEY_IN_FLIGHT

HTTP status 409

A request with this Idempotency-Key is still in progress. 409, Retry-After: 5.

The API answers with a problem document (RFC 9457) whose type is https://twinn.engineering/errors/idempotency-key-in-flight, and with X-Error-Code: IDEMPOTENCY_KEY_IN_FLIGHT. Branch on the code, never on the detail text.

How errors work, and what to retry Every error code