Contract automata facilitate the specification, composition, and synthesis of behavioural contracts, comprehending modalities and configurations. Contract automata are supported by a software API called Contract Automata Library. This paper accompanies the software artefact by discussing its architecture, showing some usage examples and presenting recent improvements of the software in terms of quality, availability, usability, and documentation. • Contract Automata Library to build applications exploiting contract automata. • Description of the software design and usage examples. • Automated building, testing and analysis with top grades. • Full availability, online documentation, and automated dependency management.