Provides access to Polymarket prediction market data, including top markets, order books, and token resolution, with on-chain verification via the Polygon blockchain.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@polymarket-mcp show me the top active Polymarket markets"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
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.
Tool | What it does |
| Top active markets by liquidity or 24h volume. Returns question, conditionId, outcome→tokenId mapping, negRisk flag, event, liquidity, volume, best bid/ask, spread. Filters: |
| Live CLOB order book(s) for one or more outcome token ids. Sorted bids/asks + best bid/ask, spread, midpoint. |
| Resolve a |
| On-chain-verified resolution: derives |
Related MCP server: Polymarket MCP Server
Requires Node 18+ (uses the built-in fetch).
npm install
npm run buildAdd 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".
npm run build && npm run smoke # drives the server over stdio against live APIsnpm test # unit tests for the ABI encoders — pure, no networkThe encoder tests are deliberately network-free so they run anywhere. The API
and on-chain paths are verified against live endpoints by hand (see npm run smoke), since CI has no route to Polymarket or a Polygon RPC.
Env | Default |
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| (unset) — required only for |
The tool only needs eth_blockNumber and eth_call, so a free keyless endpoint
is enough. Verified working without an API key:
export POLYGON_RPC_URL="https://polygon-bor-rpc.publicnode.com"https://polygon.drpc.org and https://1rpc.io/matic also answer keyless.
Note that https://polygon-rpc.com and https://rpc.ankr.com/polygon now
return 401 / Unauthorized and require an account.
Passing the optional block argument reads historical state, which needs an
archive node — most free endpoints reject it (publicnode returns "Archive
requests require a personal token"). The tool surfaces that as an error rather
than pretending the token is unregistered. Omit block to read latest.
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.
MIT
This server cannot be installed
Unclaimed servers have limited discoverability.
If you are the server author, to access and configure the admin panel.
Polymarket MCP — prediction-market data via Gamma + CLOB public APIs.
Classify Polymarket wallets as human or bot, score their trading edge, read open positions.
Kalshi MCP — US-regulated prediction-market data (no auth on public reads).
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curl -X GET 'https://glama.ai/api/mcp/v1/servers/simonlokc/polymarket-mcp'
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