# Errors codes

Swallow uses conventional HTTP response codes to indicate the success or failure of an API request. In general: 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 Swallow's servers - these are uncommon.

| Code                        | Meaning                                                |
| --------------------------- | ------------------------------------------------------ |
| **200** - Ok                | Everything worked                                      |
| **400** - Bad Request       | Request was rejected. Check the parameters of request. |
| **401** - Unauthorised      | No valid API keys                                      |
| **403** - Forbidden         | API key is not permissioned                            |
| **404** - Not Found         | The requested resource doesn't exist                   |
| **429** - Too many requests | Too many requests hit the API                          |
| **500** - Server error      | Error within Swallow servers                           |

**Example** 

```
{
    "message": "project_name has already been used",
    "status_code": 400
}
```


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://swallow-1.gitbook.io/swallow/developer-api/errors-codes.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.