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

# Errors

### 400 - Missing Prompt ID

The request is missing the required `X-Auto-Prompt-Id` header. This header is required to identify and track your prompts.

See examples of how to set the `X-Auto-Prompt-Id` header in the [Quickstart](/quickstart). <br />
For information on how to pick a good prompt ID, see [Choosing a Prompt ID](/quickstart#choosing-a-prompt-id).

### 401 - Missing API Key

The request is missing the required `Authorization` header. This header is required for authentication.

Please include your API key in the request headers. You can get an API key from your [dashboard](https://auto.venki.dev/runs). <br />
See examples of how to set the `Authorization` header in the [Quickstart](/quickstart).

### 401 - Invalid API Key

Auto could not recognize the API key provided via the `Authorization` header.

Please check your API key with your [dashboard](https://auto.venki.dev/runs) and contact support at [venki@venki.dev](mailto:venki@venki.dev) if you continue to experience issues. <br />

### 404 - Model Not Found

The requested model was not found - please use a model from the [list of supported models](https://auto.venki.dev/models).