In 2014 I started work on Cerridwen, a web API for astrology and astronomy users. It hands out basic information like the tropical position of the sun and moon, but it also has a powerful event finder that lets you pinpoint certain events like specific Phases of the Moon and other aspects between planetary bodies.
At some point I lost interest in the project, and over the years it suffered from bitrot. This week I’ve found a fresh need for this kind of API, and there is still no comparable free solution around, so I did a couple of hours of spring cleaning which included making it build properly again, setting up a new test server and updating the documentation and website.
Please check Cerridwen’s site for more information: http://cerridwen.bluemagician.vc/