> For the complete documentation index, see [llms.txt](https://docs.market.thallo.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.market.thallo.io/authentication/authentication.md).

# How To Authenticate

## API Key Management

Please see the [API Key Management](/api-endpoints/apikeymanagement.md) section for details.

## Authenticating

Each request requires that you provide an `Authorization` header with a value in this format: `Bearer API_KEY`. Replace `API_KEY` with your API key.

## Getting your API Key

Please see the [Welcome to the Thallo API](/public.md) section for details.