Nylas serves an AI Catalog
manifest at /.well-known/ai-catalog.json on cli.nylas.com, declaring
4 agentic resources
that a discovery service can index without asking anyone’s permission.
/.well-known/ai-catalog.json. ARD v0.91 renamed the path to /.well-known/ard.json and made the old one an optional courtesy, so a consumer implementing only the current spec will not find this manifest.
specVersion in the manifest. 1.0 is current for the AI Catalog data model; anything lower is an earlier draft. ARD reads this field as transport-defined and ignores it.entry-identifier-not-urn-airThe urn:ai: prefix is not sloppiness — it is the identifier scheme ARD itself
specified until ADR-0009
moved the namespace identifier from ai to air for URN validity. This publisher implemented against the earlier draft.
content-type-not-ai-catalog-jsonentry-no-representativeQuerieshost-identifier-not-did-webHosted Model Context Protocol server exposing Nylas email, calendar, and contacts tools to AI agents. Requires a Nylas API key; US data region. Install locally with `nylas mcp install` or proxy with `nylas mcp serve`.
Hosted Model Context Protocol server for the EU data region. Same email, calendar, and contacts tools as the US endpoint, served from EU infrastructure.
Curated index of guides, command reference, and AI answer hubs for the Nylas CLI, formatted for AI agents. Full catalog at https://cli.nylas.com/llms-full.txt.
REST API for email, calendar, contacts, agent accounts, and meeting transcription (Notetaker) across Gmail, Microsoft, iCloud, Yahoo, and IMAP providers.
Content-Type: application/json —
yesAccess-Control-Allow-Origin: * —
yeshttps://cli.nylas.com/.well-known/ai-catalog.json on 2026-09-13, HTTP
200. The verbatim body is stored alongside its manifest in the
Nylas repository
as ai-catalog/nylas-ai-catalog.json. Nothing on this page is derived
or generated: an AI Catalog manifest is served from the publisher’s own domain or it does not
exist, which makes it — like an
A2A Agent Card — one of the few agent artifacts that cannot be
produced on a provider’s behalf. Grades are recomputed on every build; the specification is a
v0.9 draft and
these verdicts will move when it does.
Every descriptor here is available over the APIs.io API and to AI agents over MCP. Agent Discovery is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.