"Services or tools that don't require a separate API key" matching MCP connectors:

Reassign: a circular 24-hour calendar and time-tracking copilot with ADHD-friendly scheduling.

OneHaus household tools: tasks, calendar, contacts, pets, vehicles, documents and more.

Verified local businesses, bookable by AI agents: services, prices, availability and appointments.

Chilean online mental-health clinic (Spanish): articles, professionals, availability, tests.

take-the-meeting MCP — wraps StupidAPIs (requires X-API-Key)

Calendly MCP Pack — wraps the Calendly API v2 for scheduling data.

Free no-signup group scheduling (a modern When2meet): share one link, find a time for everyone.

Book a Ukrainian-speaking vertebrologist in Chernivtsi, Ukraine: find slots and book for the user.

Scheduling, availability, clients, billing and CRM for appointment-based services.

Invite someone to a calendar event by phone number and get their real email back when they accept.

Orbit Zürich: Workshop-Räume, Preise und freie Slots abfragen, Buchungsanfragen stellen.

Hosted MCP server for the Healthie EHR & telehealth API: patients, appointments, charting, tasks.

Members-run AI builder space on Floor 10, Frontier Tower SF. 138 tools: events, news, directory.

MCP server for Nylas — read email, calendars, events and contacts, and send email or create events.

Calendar API for AI agents: events, availability, Google/Microsoft setup, scheduling, and iCal.

Group scheduling: create a plan link, mark availability, get best times, lock the final time.

Live KARVE Pilates class schedule and availability in Jeddah, with booking links. Read-only.

Find public EventMatey events that organisers have approved for AI discovery.

Agent-native CRM + get-booked platform. Operate over MCP, or pay per call via x402. No login.

Book, reschedule, and cancel home services (cleaning, lawn, snow) via phone OTP authentication.