The API documentation is available through OpenAPI. Once the server is running, you can access the OpenAPI docs at:
http://localhost:3000/docs
There is an application scope authentication/authorization in the bee-observe via the x-bee-authorization header.
The API key is defined via the AUTH_KEY environment variable.
Use a long/strong API key to secure your API
See OpenAPI docs for more info, on how to define the auth key for requests.