List authorized channels, which one is the default, and where configuration lives. Start here when unsure what this server can see.

Start authorizing a channel. Returns the consent URL immediately — give it to the owner to open in a browser, then poll youtube_authorize_status. Run it again, picking a different Google account in the browser, to add another channel.

Check an in-flight consent flow started by youtube_authorize: still waiting, finished, or failed. Also re-prints the consent URL.

Abandon an in-flight consent flow so a new one can be started.

Choose which authorized channel calls use when none is named.

Remove a stored refresh token. This does not revoke the grant — do that at https://myaccount.google.com/permissions.

Exercise every stored grant and report its age. Use as a health check, or on a daily schedule: it is not established whether the 7-day Testing clock is absolute or slides on use, and if it slides this keeps grants alive. Cannot create a new grant — only consent does that.

Unrestricted YouTube Analytics reports.query — any metrics/dimensions/filters/sort the API accepts. This API has no "since published" window, so a date range covering a live stream returns its live audience by construction.

Unrestricted call against the YouTube Data API v3 (e.g. /videos, /channels, /liveBroadcasts, /search). Read-only unless YTMCP_ALLOW_WRITE=1.

Unrestricted call against the YouTube Reporting API (e.g. /jobs, /reportTypes, /media). Read-only unless YTMCP_ALLOW_WRITE=1.

Summary plus traffic-source split for one video or live stream, over a window wide enough to include the live audience. A convenience over youtube_analytics_query.

Peak and average concurrent viewers for one ended live stream, minute by minute. These metrics are real but only answer in one exact query shape, which this builds.

What these APIs can and cannot answer. Read this before concluding a metric is missing.