Discovery for agents
ai-catalog.json
Also known as: Agent-readable dataset, ARD
ai-catalog.json is a well-known JSON manifest that advertises a site's agent-facing surfaces - its API, dataset, and MCP endpoint - in one discoverable place.
ai-catalog.json is a manifest served under /.well-known/ that declares, in one machine-readable document, how an AI system should consume a site: where the API lives, how to page it, what dataset is available, and how to reach any MCP server.
It is a discovery entry point - the single file an agent can fetch first to learn everything it needs to work with a site as data.
In GraphCanon
GraphCanon serves "/.well-known/ai-catalog.json" describing its JSON API, corpus dataset, and MCP endpoint, so an agent can bootstrap from one URL instead of scraping.
See also
Related terms
Last reviewed 2026-07-09