API Checker is a Google App Engine application for checking API compatibility/completeness of applications in development, written in Go.

API profiles (APIProfile) can be created with comparison cases (Comp) using either of JSON, XPath, and Header matching methods.

Application profiles (Application), when referred to an APIProfile can be used to check and monitor the API completeness of the application.

Documentation is available at http://godoc.org/github.com/swook/apichecker

The application runs at http://api-checker.appspot.com/

This application is still in development.