> ## Documentation Index
> Fetch the complete documentation index at: https://docs.yuko.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Errors

Yuko uses conventional HTTP response codes to indicate the success or failure of an API request. Codes in the `2xx` range indicate success. Codes in the `4xx` range indicate an error caused by the information provided. Codes in the `5xx` range indicate an error on Yuko's servers.

## Error response codes

| **Status Code** | **Description**                                                                                                                                       |
| :-------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------- |
| 400             | The request was not accepted, often due to missing parameters, bad syntax, or a missing `Content-Type` header.                                        |
| 401             | The required authentication credentials are missing or incorrect.                                                                                     |
| 403             | The server is refusing to respond, usually because you do not have access or permission to the requested resource.                                    |
| 404             | The requested resource doesn't exist.                                                                                                                 |
| 422             | The request body was well-formed but contains semantic errors (e.g. insufficient points balance). Refer to the response body for further information. |
| 429             | Your API token has exceeded its rate limit.                                                                                                           |
| 500             | An internal error occurred in Yuko. Retry your request. If the issue persists, contact Yuko support.                                                  |
| 503             | The server is currently unavailable.                                                                                                                  |