EventCatalog
Open-source living documentation for event-driven architectures.
About
EventCatalog is an open-source documentation tool for event-driven architectures created by David Boyne. It treats architecture documentation as a generated website: you define domains, services, events, commands, queries, and schemas in markdown, and it renders interactive visual maps of how everything connects, with versioning, changelogs, and ownership built in.
Unlike static docs that rot, EventCatalog stays current through generators for 15+ messaging platforms plus OpenAPI and AsyncAPI imports, and it now includes AI-powered architecture discovery. The project reports 40,000+ catalogs created and 70+ contributors, is MIT licensed, and scaffolds a new catalog in seconds with npx.
What it can do
- Interactive maps of domains, services, and events
- Versioned docs with changelogs and ownership
- Generators for 15+ messaging platforms
- AI-powered architecture discovery
- MIT-licensed open source with plugin architecture
Setup
Run npx @eventcatalog/create-eventcatalog@latest my-catalog, then open localhost:3000.
Prerequisites
Node.js; an event-driven or microservices architecture worth documenting.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (metrics tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 99; Trending score 72/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.