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

# HTTP Status Codes

> The Upstash API uses the following HTTP Status codes:

| Code | Description               |                                                                                 |
| ---- | ------------------------- | ------------------------------------------------------------------------------- |
| 200  | **OK**                    | Indicates that a request completed successfully and the response contains data. |
| 400  | **Bad Request**           | Your request is invalid.                                                        |
| 401  | **Unauthorized**          | Your API key is wrong.                                                          |
| 403  | **Forbidden**             | The kitten requested is hidden for administrators only.                         |
| 404  | **Not Found**             | The specified kitten could not be found.                                        |
| 405  | **Method Not Allowed**    | You tried to access a kitten with an invalid method.                            |
| 406  | **Not Acceptable**        | You requested a format that isn't JSON.                                         |
| 429  | **Too Many Requests**     | You're requesting too many kittens! Slow down!                                  |
| 500  | **Internal Server Error** | We had a problem with our server. Try again later.                              |
| 503  | **Service Unavailable**   | We're temporarily offline for maintenance. Please try again later.              |