The Matrix RESTful API uses basic HTTP with returns in JSON. Register for an account to receive your API Key. Use the API to create and manage distributed chat rooms. Matrix is built on an open platform and federated in order to be accessible over any system or server. Some of the chat and VoIP capabilities the Matrix API offers are: send and receive extensible messages with (optional) end-to-end encryption, eventually-consistent cryptographically secure synchronization of chat rooms, and extensible control over users and rooms (invite/remove, join/leave, edit room user and room names, add/remove user accounts).