@datapolymarket/mcp

MCP (Model Context Protocol) server for datapolymarket.com — weather and crypto data for Polymarket traders, exposed as native tools to Claude, Cursor, Codex, Cline, and any other MCP-compatible AI agent.

What it does

Wraps the datapolymarket REST API behind 6 MCP tools your AI can call directly:

| Tool | Purpose | Tier | |---|---|---| | weather_current | Current temp + today's running max for any of 44 cities | Free | | weather_forecast | Multi-model ensemble forecast (ECMWF, GFS, ICON, JMA, UKMO) | Trader+ | | resolution_probability | Real-time YES probability for a Polymarket weather market | Pro | | crypto_oracle_lag | Polymarket vs Binance vs Chainlink price drift | Crypto bundle | | crypto_spread | Polymarket order-book spread + Binance reference | Crypto bundle | | list_open_markets | Convenience listing of tracked cities + meta | Free |

Authentication is per-user: your DPM_API_KEY is forwarded as X-API-Key to the API. The MCP server does not bypass any access controls or tier limits.

Install

Claude Code / Claude Desktop

Add to ~/.claude/config.json (or your project's .mcp.json):

{
  "mcpServers": {
    "datapolymarket": {
      "command": "npx",
      "args": ["-y", "@datapolymarket/mcp"],
      "env": { "DPM_API_KEY": "dpm_..." }
    }
  }
}

Cursor / Cline

Open Settings → Tools & MCP → Add server, paste the same command/args/env JSON.

Codex CLI

Edit ~/.codex/config.toml:

[mcp_servers.datapolymarket]
command = "npx"
args = ["-y", "@datapolymarket/mcp"]
env = { DPM_API_KEY = "dpm_..." }

Get an API key

datapolymarket.com/signup — passwordless email sign-in, key auto-issued on first verify.

Example prompts (after install)

Find me 3 mispriced Polymarket weather markets resolving today.

Is there a BTC oracle-vs-spot arb on Polymarket right now?

What's the bias-corrected daily-max forecast for Atlanta?

The AI picks the right tool, calls it with your key, and reasons over the JSON.

Local development

git clone https://github.com/datapolymarket/mcp
cd mcp
npm install
npm run build
DPM_API_KEY=dpm_... node dist/index.js

The server speaks MCP over stdio — pair it with any MCP client to test.

License

MIT.