Matrix Specification
Matrix
Matrix spec versions are published at spec.matrix.org with a structured API index — the federated messaging alternative to XMPP.
What It Is
Open standard for decentralized real-time communication: Client-Server API, Server-Server federation, Application Services, and Push Gateway.
Taxonomy
By API: Client-Server · Server-Server · Application Service · Push · Identity · Room versions
Top-Level Categories
Master Catalog
Sub-Indexes & Guides
Non-profit foundation that stewards the Matrix open standard for decentralized real-time communication. Publishes the Matrix Specification including Client-Server API, Server-Server Federation API, Application Service API, and Push API. Element (formerly Riot) is the reference client.
View all bodies →Curated specs from Matrix
Matrix is the modern alternative to XMPP for federated messaging: bridges to Discord/Slack/WhatsApp, end-to-end encryption by default, and full decentralization. Used by the German government, French public sector, and Mozilla.