The API is currently in beta. We are looking for feedback on both, the API design itself as well as the documentation.
You can use the Humanitec API to automate operations normally carried out with the UI.
You can easily extend the managed services Humanitec can interact with to provision external resources by creating your own drivers.
One of the core parts of Humanitec is how we use Deployment Sets and Deltas to track configuration change over time and make it visible to developers.