IANAL but I don't think API compatibility is infringement[1]. At least, I've seen projects that advertise this as a feature - for example, errbit[2] is API-com

IANAL but I don't think API compatibility is infringement[1]. At least, I've seen projects that advertise this as a feature - for example, errbit[2] is API-compatible with Airbrake. [1]: https://en.wikipedia.org/wiki/Application_programming_interface#APIs_and_copyrights https://en.wikipedia.org/wiki/Application_programming_interf... [2]: https://github.com/errbit/errbit https://github.com/errbit/errbit