> For the complete documentation index, see [llms.txt](https://docs.rateparity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rateparity.com/errors.md).

# Errors

RateParity uses conventional HTTP response codes to indicate the success or failure of an API request. In general: Codes in the 2xx range indicate success. Codes in the 4xx range indicate an error that failed given the information provided (e.g., a required parameter was omitted, etc.). Codes in the 5xx range indicate an error with RateParity's servers.

| 200 - OK                           | Everything worked as expected.                                                                   |
| ---------------------------------- | ------------------------------------------------------------------------------------------------ |
| 400 - Bad Request                  | The request was unacceptable, often due to missing a required parameter.                         |
| 401 - Unauthorized                 | No valid API key provided.                                                                       |
| 402 - Request Failed               | The parameters were valid but the request failed.                                                |
| 403 - Forbidden                    | The API key doesn't have permissions to perform the request.                                     |
| 404 - Not Found                    | The requested resource doesn't exist.                                                            |
| 409 - Conflict                     | The request conflicts with another request (perhaps due to using the same idempotent key).       |
| 429 - Too Many Requests            | Too many requests hit the API too quickly. We recommend an exponential backoff of your requests. |
| 500, 502, 503, 504 - Server Errors | Something went wrong on RateParity's end.                                                        |