"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Business days, meeting overlap and recurrence expansion, deterministic. 3 of 5 tools free.
Turn a list of interests into a day-by-day plan for 3 to 7 days, with checkbox text for a todo app.
Warehouse dock appointment scheduling: find open slots, book, reschedule, approve, and check in trucks.
Schedule and cross-post short-form video to TikTok, YouTube Shorts, Reels and 10 more platforms.
Fair meeting times across time zones: find the overlap, convert times, make calendar links.
Find free times at Gaplessly businesses on a plan with AI booking, then get a link to book.
Remote MCP server for SYNCDATE, the two-way calendar sync for Google, Outlook, iCloud and CalDAV. Manage syncs and accounts on every plan; read, find and change calendar events on Plus, Pro and Team. OAuth 2.0 with PKCE, hosted, no API key.
INITE itself: services and prices, free call slots, booking a call, writing to the team. No token.
Find meeting times that overlap working hours across IANA time zones, DST-aware. Free tier.
Find open slots on any appty link and book solo providers. Providers manage bookings by API key.
Western church year: seasons, colors, feasts, Easter and Pascha, and the 1979 BCP Sunday lectionary.
Japanese national holidays from the Cabinet Office data: check dates (holiday / substitute holiday / business day), count business days, find the date N business days later, and list long weekends. Does not guess unannounced years.
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.
Reassign: a circular 24-hour calendar and time-tracking copilot with ADHD-friendly scheduling.
Calm day planner for designers and freelancers. Read, add, time and move your tasks from Claude.
AI front desk for your website: read chats, bookings and analytics, and draft desks you approve.
Holidays, business days, currency, time zones, DNS/WHOIS, web page checks, geodata and text tools.
Field service management: find customers, read the schedule, create and book jobs, add notes.
Gmail, Outlook, Drive, OneDrive and calendars for AI agents. Many accounts, one endpoint, audit log.
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.
