"Free tools or resources that do not require an API" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Scheduling: event types, open slots, and booking, rescheduling or cancelling meetings in Caly.
Business days, meeting overlap and recurrence expansion, deterministic. 3 of 5 tools free.
Mac & Windows: let ChatGPT, Claude & Cursor use your email, calendar, iMessage, Teams, files. Free.
Reassign: a circular 24-hour calendar and time-tracking copilot with ADHD-friendly scheduling.
Search, summarize and organize your WhatsApp chats from Claude, ChatGPT or Cursor: contacts, groups, labels, notes, reminders and scheduled messages. Tool calls run in the Kaption extension for WhatsApp Web (Chrome, Edge) or the Kaption desktop app, which must be open. Sign-in is OAuth 2.1 with a code sent on WhatsApp. No send-now tool. Setup: https://kaptionai.com/mcp/
Hosted remote server for a Microsoft 365, Gmail or IMAP mailbox you already own: read, search, draft, reply in thread, forward and file mail. It moves or flags up to 500 messages in one call, and a send leaves exactly one copy in Sent. A calendar is a separate connection, and connecting one adds diary and scheduling tools.
See your salon's free slots, appointments, stylists, services, clients, quotes and payments.
See your clinic's free slots, doctors, rooms, service prices and how busy each day is.
Free hosted MCP server that connects ChatGPT and Claude (claude.ai, Claude Code) to multiple Gmail, Google Calendar, Google Drive (read-only) and Google Contacts accounts, Slack workspaces and Notion through one connection URL. Search, read and act across every connected account at once, with a memory shared across your AI assistants. OAuth sign-in. Outlook / Microsoft 365 are not supported.
Gmail, Outlook, Drive, OneDrive and calendars for AI agents. Many accounts, one endpoint, audit log.
Read-only MCP server for short-term rental owners in Poland. Query reservations, availability, pricing, guest reviews, and monthly stats via 10 tools. OAuth 2.1 with PKCE or static Bearer token.
Zero-auth MCP server for sending a reminder to anyone with a public UnRemind.me page. No account or token. The recipient approves it before it enters their list.
250,000+ real, local, future events, ranked for the signed-in person. Free to connect.
Reliable Australian business-day, public-holiday and deadline tools for AI agents.
Time and date math for AI agents: Unix timestamp conversion, DST-correct time zone conversion, durations, epoch arithmetic, cron schedules, and holiday countdowns. Eight tools, no key.
I do everything related to calendar scheduling
OneHaus household tools: tasks, calendar, contacts, pets, vehicles, documents and more.
Answer small-business customer questions from FAQs, list open appointment times, and book them.
Find free times at Gaplessly businesses on a plan with AI booking, then get a link to book.
Calculate API and subscription costs, meeting time zones, recurring schedules and cron matches.
