I couldn't find any publicly available galnet APIs so I made my own. The endpoint will return whatever is available in the official (a bit messy) Galnet feed.
The Alpha Orbital Galnet feed will return an array of JSON objects that contain a title, content and a date for the last 15 galnet news.
Usage:
Send a plain get request to https://www.alpha-orbital.com/galnet-feed to fetch the JSON feed