> For a complete page index, fetch https://developer.close.com/llms.txt

# HTTP Response Codes

The following HTTP codes are used in the responses:

- `200` when the request was successful.
- `400` when there was an issue with the request.
- `401` when the request needs to be authenticated.
- `402` when the request could not be completed, because a limit of your current
  plan was reached.
- `403` when an operation was not allowed.
- `404` when the URL was not found.
- `405` when the HTTP method was not supported.
- `415` when the request used an unsupported format.

> HTTP status codes returned by the Close API and what they mean.