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

# Errors

Proper uses standard 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 that failed given the information provided. Codes in the `5xx` range indicate an error with Proper.

| <div style={{ width: "150px" }}>HTTP Status Codes</div> |                                                                                                         |
| ------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
| `200 OK`                                                | Everything worked as expected. The request was unacceptable, often due to missing a required parameter. |
| `400 Bad Request`                                       | The request was unacceptable, often due to missing a required parameter.                                |
| `401 Unauthorized`                                      | No valid API key provided.                                                                              |
| `403 Forbidden`                                         | The API key doesn’t have permissions to perform the request.                                            |
| `404 Not Found`                                         | The requested resource doesn’t exist.                                                                   |