Errors

Errors use the HTTP status code and a JSON body of one shape:

{
  "error": {
    "code": "quota_exhausted",
    "message": "The monthly allowance of 25,000 calls is used. It renews at 2026-12-01T00:00:00.000Z, or you can change plan in the console.",
    "details": {}
  }
}

Status	Code	Meaning
400	`invalid_json`, operation-specific codes	The request is malformed or a value is out of range.
401	`invalid_api_key`	The key is missing, unknown or revoked.
403	`plan_excludes_service`	The plan does not include this API.
403	`fact_limit_reached`	The Memory API holds as many facts as the plan allows.
404	`not_found`	No such endpoint or object.
413	`body_too_large`	The request body is larger than 10 MB.
429	`rate_limited`	Too many requests per second. Retry after the number of seconds in `Retry-After`.
429	`quota_exhausted`	The allowance of the current window is used.
503	`service_unavailable`	The API is temporarily unavailable. Retry with a growing delay; see Status.
504	`upstream_timeout`	The API did not answer in time.

Each API reference lists the codes of its own operations.