This is the extra flavor of Judge0 Community Edition.
Judge0 is a robust, scalable, and open-source online code execution system that can be used to build a wide range of applications that need online code execution features. Some examples include competitive programming platforms, e-learning platforms, candidate assessment and recruitment platforms, online code editors, online IDEs, and many more.
The full API documentation is available at https://extra-ce.judge0.com.
The status page is available at https://status.judge0.com.