What happened to the URL on file for Cal.build?

URL unreachable The URL on file (https://www.cal.build/) did not respond across three consecutive checks; the streak completed on 2026-09-20.

This reports what that URL did, not a claim that Cal.build itself is gone: the address on file does not confidently match Cal.build's own domain, so if it turns out to be a marketplace or listing page rather than Cal.build's own site, this observation is still accurate about the URL, just not about the product. See the methodology for how the match is made.

The vendor's own description, unedited:
Overview I built Cal.build after getting frustrated with planning documents shared as PDFs usually from people outside my daily workflow. I wanted a minimal way to go from idea -> schedule -> live calendar. You type what you want to plan, it returns a calendar with a .ics URL you can subscribe to (Google Calendar and others). Example:“Plan a 5-day team summit in Costa Rica starting May 1st, including team building activities and project planning sessions.” Returns a full schedule with editable events, a public URL, and live updates. Features: 1. Text-to-calendar conversion 2. Subscribable .ics link 3. Shareable and auto-updating Stack: Next.js, Supabase, AI SDK, deployed on Vercel. Would appreciate feedback. https://www.cal.build/

Live alternatives

No active same-category alternatives in the registry yet. The tools index carries everything else that is live.

How this was decided

Not an editorial call. The URL on file failed three consecutive checks, with a confirmation re-probe before the streak counted (a bot-wall response never counts as one), and the 3-miss rule marks the listing discontinued automatically. If the URL responds again, the registry restores it on its own: warn first, then active. Both directions are recorded as events.

Spot an error? Tell us. Corrections to the record append, they never rewrite.