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Errors from /v1 endpoints return an Error object. The token endpoint, /oauth/token, returns OAuth 2.0 errors (error and error_description) instead. A request body that is over 10 MB or can’t be read gets a plain 4xx response without an Error object. Its code identifies the error and doc_url links to the page for that code below. When a validation error is about specific parameters, invalid-params lists them. With an Idempotency-Key, most 4xx responses are stored and replayed for at least 24 hours. After fixing the request, send it with a new key.
Include request_id when you contact support.
Last modified on October 27, 2026