mcp-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.

Installation

npm install -g mcp-meetsync

Or run directly with npx:

npx mcp-meetsync

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.

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.

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 |

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

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

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

License

MIT