Web Analytics Query API returns 404 "Web Analytics not found" while the dashboard shows data

The Web Analytics Query API returns 404 not_found — "Web Analytics not found." for GET /v1/query/web-analytics/visits/aggregate, but the Analytics tab for the same project shows real data (53 visitors and 82 page views for Nov 2–9, 2026).

What I tried: the project by name and by ID, with and without teamId, by=day, ISO dates with milliseconds, epoch-millisecond dates, and a production filter. All return the same 404. I used the Vercel MCP connector, with the connector authorised and able to list the project and team. It has failed every week since Oct 12, 2026.

Example request IDs: iad1:iad1:iad1:sfo1::vcnh6-1794269612735-3e717d0bbb1c iad1:iad1:iad1:sfo1::sj9qt-1794269618698-49a4537f60f1 iad1:iad1:iad1:sfo1::g8bl2-1794270081167-f6274f1a0de5 iad1:iad1:iad1:sfo1::mnr4x-1794270082010-6927692d06c4

#analytics