Bad Request — an unknown query parameter was sent, request_ids is malformed, or has more than the allowed number of IDs. Returns {"code": "query_param", "message": "<specific reason>"}, e.g. Too many request IDs: 150 given, maximum is 100.

Forbidden — missing/invalid/expired credentials, or the account is temporarily blocked after repeated requests for other users' records (detail); or a returned record does not belong to the requesting user (error). A blocked account stays blocked until support unblocks it.

Not Found — one or more request IDs do not exist or do not belong to the requesting user. Returns {"code": "not_found", "message": "Request IDs not found: 101, 102."}.