Fully functional API was never an option
GoosyMock is a configurable test service for mocking HTTP responses, featuring SSL support, dedicated administration API and custom payloads (binary files that can be served on particular routes). It's also prepared for Kubernetes deployments (Helm chart), making it easy to adapt and use.
This project is successor to GPTS and was initially meant to be an improvement over existing solution by introducing new internal architecture, better approach for serving custom content and overall improvements to both code's and repository's structure. Changes turned out to be hard to apply, which led to rewriting whole source code from scratch.