Create a RESTful API for your Minecraft server, with custom values, such as a PlaceholderAPI placeholder value.
You can get the plugin in GitHub Releases
Fork this project, make your changes in the main src/main/java/tk/darklegacymc/apimachine/APIMachine.java file, test it out by compiling with mvn clean install. You need maven for this. After you test out your new bug fix / addition of features, you can create a pull request.
This project makes use of the GPL-3.0 license.