API error response packet

An API error response packet is a compact record of one failed request that is detailed enough to debug without exposing credentials. It connects the HTTP status, response body shape, request method, endpoint, request ID, retry behavior, and caller context.

MDN HTTP documentation treats status codes as grouped responses, with client errors in the 400 range and server errors in the 500 range. That classification is a useful first sort, but it is not enough by itself. A 401, 403, 404, 409, 422, 429, and 500 can all require different fixes even if they appear near each other in a log stream.

A practical packet includes method, path pattern rather than secret URL, status code, response error code, short message, request ID or trace ID, environment, timestamp, idempotency key if relevant, retry count, rate-limit headers when present, and whether the same request succeeds with a different account or payload.

The packet should avoid private tokens, cookies, full personal data, or raw payloads with customer information. The point is to preserve enough shape for debugging while keeping the record safe to share in a ticket, support thread, or team note.

Api error response packet status body request id retry context 2026 06 26

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