There are a few publications, describing the API from the technical side as well as providing further examples and ideas for using it:
ChEMBL web services: streamlining access to drug discovery data and utilitiesarrow-up-right
ChEMBL Beaker: A Lightweight Web Framework Providing Robust and Extensible Cheminformatics Servicesarrow-up-right
Want Drugs? Use Pythonarrow-up-right
Last updated 6 years ago