Accessing APIs in Exaptive is pretty straightforward. So this is going to be a short article!
It will usually require the use of Python or R. We have a tutorial to get you started with Python. It can be found here.
Overall, the process is essentially using a component to access a RESTful API and feeding it any configurations (URL, tokens, etc). When the component is triggered it makes the call and returns your data that can then flow into your other components as a data source.