OPDC API error code

AUTHORIZATION_UNAVAILABLE

HTTP status 503

What this MCP connection may see could not be checked just now. 503, retryable. Access is refused rather than assumed.

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

How errors work, and what to retry Every error code