polymarket-mcp

Clean, NegRisk-resolved Polymarket market & order-book data as an MCP server. No API key, no database — stateless wrappers over the public Gamma and CLOB APIs, with the messy parts (keyset pagination, NegRisk flags, token→outcome resolution, book parsing) already handled for you.

Point any MCP client (Claude Desktop, Cowork, Cursor, …) at it and your agent can query prediction-market data directly.

Tools

Related MCP server: Polymarket MCP Server

Install & run

npm install
npm run build

Add to your MCP client config (e.g. Claude Desktop claude_desktop_config.json):

{
  "mcpServers": {
    "polymarket": { "command": "node", "args": ["/absolute/path/to/polymarket-mcp/dist/server.js"] }
  }
}

Then ask your agent things like "what are the most active Polymarket markets right now?" or "get the order book for this token id".

Try it without a client

npm run build && npm run smoke   # drives the server over stdio against live APIs

Config (all optional)

Notes

• Read-only. No trading, no orders, no keys. It reads public data.

• Every fetch has a hard timeout + backstop so a stalled upstream can't hang the server.

• This is a data-access tool, not trading advice. Prices and books are live public data; verify before acting on them.

License

MIT