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

# Authorization

Partners must include their assigned API key in the `X-API-Key` request header when interacting with the Blockz API.

All requests are authenticated by validating this header. Requests without a valid API key will be rejected.

The `X-API-Key` header is required for access to all protected endpoints.

#### **Authentication Method**

Include your API key in the HTTP header:

```http
X-API-Key: <your_api_key>
```

For an API key, please contact: <rolo@blockz.fi>