# Error Reference

## HTTP status codes

Fordefi will return the following status codes for HTTP requests:

| Code | Meaning |
|  --- | --- |
| 400 | Bad Request - Your request is invalid. |
| 401 | Unauthorized User - User is not authenticated. You must authenticate your request with an API key. |
| 403 | Forbidden User - User is not allowed to execute this action. |
| 404 | Not Found - Requested resource is not found. |
| 408 | Request Timeout - Reached time out while processing the request. |
| 409 | Already Exists - Request cannot be completed because resource already exists. |
| 422 | Validation Error - Semantic errors in the request. |
| 429 | Rate Limit Exceeded - Too many requests in a given amount of time. |
| 500 | Unexpected Error - Internal server error. |