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

# API Access

In order to use any of our APIs, you must authenticate your HTTP requests using an access key. HTTP requests using no authentication or invalid access keys will result in 401 Unauthorized.

To access our APIs using an access key you will need to:

1. Create an access key and assign the required permissions
2. Include the access key in the Authorization header of your HTTP requests