The API docs (with node.js and python code examples) can be found here. We have REST and Websocket APIs.
To get started, create an API key from the web app's Profile menu.
See how to create an API key in our Help Centre guide.
Save the ID and the Secret, which can be placed into the API_KEY_ID and API_KEY_SECRET variables in the example code.
An example of a market making bot can be found on GitHub.