Meetsync

MCP server for MeetSync — a calendar negotiation API built for AI agents.

Exposes all 19 MeetSync endpoints as MCP tools so any MCP-compatible LLM can autonomously find availability, propose meeting times, and confirm bookings — no human back-and-forth required.

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Installation

npm install -g mcp-meetsync

Or run directly with npx:

npx mcp-meetsync

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Configuration

The server reads two environment variables:

Variable	Required	Default	Description
MEETSYNC_API_URL	No	http://localhost:3000	Base URL of your MeetSync API
MEETSYNC_API_KEY	Yes	—	API key sent in X-API-Key header

Copy .env.example to .env and fill in your values, or pass them directly in the Claude tool definition.

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Adding to Claude

Paste this snippet into your Claude desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "meetsync": {
      "command": "npx",
      "args": ["-y", "mcp-meetsync"],
      "env": {
        "MEETSYNC_API_URL": "https://api.yourmeetsync.com",
        "MEETSYNC_API_KEY": "your-api-key-here"
      }
    }
  }
}

After saving, restart Claude. The 19 MeetSync tools will appear in Claude's tool list.

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Tools

All 19 MeetSync operationIds are exposed as tools. Tool names match operationIds exactly.

Participants (7 tools)

Tool	When to use
listParticipants	Browse or search registered participants
createParticipant	Register a new person before they can be scheduled
getParticipant	Look up a specific participant's timezone/provider details
updateParticipant	Change a participant's name, email, timezone, or calendar setup
deleteParticipant	Permanently remove a participant (use force to cascade)
getParticipantPreferences	Read a participant's working hours and scheduling constraints
setParticipantPreferences	Define or replace working hours, blackout windows, and buffers

Availability (2 tools)

Tool	When to use
getParticipantAvailability	Find free windows for a single participant
findMutualAvailability	Find scored slots that work for all participants simultaneously

Proposals (5 tools)

Tool	When to use
listProposals	Browse pending or historical proposals
createProposal	Propose candidate time slots and send to participants for consensus
getProposal	Check proposal status and see who has responded
cancelProposal	Withdraw a pending proposal
respondToProposal	Record a participant's acceptance or rejection

Bookings (5 tools)

Tool	When to use
listBookings	Browse confirmed, cancelled, or rescheduled meetings
createBooking	Confirm a booking from an accepted proposal, or book directly
getBooking	Retrieve full details of a specific meeting
rescheduleBooking	Move a confirmed meeting to a new time
cancelBooking	Cancel a meeting permanently

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Example agent workflow

Here is a complete scheduling workflow an AI agent would follow using these tools:

1. createParticipant  ← register [email protected]
2. createParticipant  ← register [email protected]
3. setParticipantPreferences  ← Alice: Mon–Fri 09–17, 15 min buffer
4. setParticipantPreferences  ← Bob: Mon–Fri 10–18, no back-to-back
5. findMutualAvailability  ← find 60-min slots next week for [alice, bob]
   → returns top 5 scored slots
6. createProposal  ← "Budget Review" with top 3 slots, expires in 24h
   → proposal id: prop_abc123
7. respondToProposal  ← alice accepts, prefers slot 1
8. respondToProposal  ← bob accepts, prefers slot 1
   → proposal auto-transitions to "accepted", acceptedSlotId set
9. getProposal  ← confirm acceptedSlotId
10. createBooking  ← proposalId + slotId
    → booking confirmed, calendarEventIds written

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Development

# Install dependencies
npm install

# Type-check without building
npm run typecheck

# Build to dist/
npm run build

# Run in dev mode (auto-reloads)
MEETSYNC_API_URL=http://localhost:3000 MEETSYNC_API_KEY=dev-key npm run dev

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Architecture

src/
  index.ts          ← MCP Server, ListTools + CallTool handlers, stdio transport
  client.ts         ← Typed fetch wrapper: GET/POST/PUT/PATCH/DELETE + X-API-Key injection
  tools/
    participants.ts  ← 7 participant tools + handlers
    availability.ts  ← 2 availability tools + handlers
    proposals.ts     ← 5 proposal tools + handlers
    bookings.ts      ← 5 booking tools + handlers

Each tool file exports:

• A Tool[] array with name, description, and inputSchema (strict JSON Schema)
• A handle*Tool(name, args) async function that calls the MeetSync API via client

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License

MIT