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

# Errors

<Danger>
  The Simplifi API is in **Developer Preview**. While not all features are finalised, we encourage you to explore and share your feedback — including thoughts on endpoint design, response structure, or areas where documentation could be clearer.
</Danger>

The Simplifi API uses the standard HTTP response codes to indicate the success or failure of an API request.

A response code in the 2xx range indicates success, while a response code in the 4xx range indicates an error that failed as a result of the information that was provided. Codes in the 5xx range are the result of an error with Simplifi's servers.

| Code | Response              | Explanation                                          |
| ---- | --------------------- | ---------------------------------------------------- |
| 400  | Bad Request           | Malformed request, invalid JSON                      |
| 401  | Unauthorized          | Missing or invalid token                             |
| 403  | Forbidden             | Valid token, but you cannot do this                  |
| 404  | Not Found             | The resource you are trying to access doesn't exist  |
| 409  | Conflict              | The resource you are trying to create already exists |
| 422  | Unprocessable Entity  | Validation errors                                    |
| 429  | Too Many Requests     | Your rate limit has been exceeded                    |
| 500  | Internal Server Error | Something unexpected broke                           |
| 502  | Bad Gateway           | Upstream service failed                              |
| 503  | Service Unavaliable   | The Simplifi servers are down or overloaded          |