The Panel API returns HTML, which you can load into an Iframe. The other APIs return arrays of objects as JSON.
As soon as we activate your API account, we will send you a link to an interactive documentation, where you can find everything that you need for testing and implementation.
You communicate with the API via HTTP/S, using GET and POST requests (content type: application/x-www-form-urlencoded).
It works in two simple steps:
Use your credentials to request a token (from within your application's backend).
Use this token to request data from the API (which can be done from within your application's frontend). The token will expire after some time. To continue requests, simply request a new token via your application backend.