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Polymarket

gamma-api.polymarket.com

Prediction market data: events, markets, outcome prices, order books and price history from Polymarket's public Gamma and CLOB APIs.

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Runs on your machine under the source's own terms

The crw MCP on your computer calls Polymarket directly. Calls cost no credits and the data does not pass through fastCRW. Install it once for Claude Code, Cursor, Codex, Windsurf, Gemini CLI or OpenCode, with your fastCRW API key in place of the placeholder:

Ask with this source

A prompt for your agent that names this source and how to call it through the crw MCP.

  • CLOB market

    Use Polymarket (polymarket) from fastCRW Pergamon, capability "CLOB market" (clob-market). You have a condition id and need the trading parameters rather than the descriptive record. Example options: conditionId=0xa467b14d51f01b957109d9cbb1d6c124fab2a089d52ed8f471d23c2812e743b7. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "polymarket" and capability "clob-market". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>

  • Event

    Use Polymarket (polymarket) from fastCRW Pergamon, capability "Event" (event). You have an event id and want all of its markets in a single call. Example options: eventId=903193. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "polymarket" and capability "event". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>

  • Event list

    Use Polymarket (polymarket) from fastCRW Pergamon, capability "Event list" (events). You want the topic level rather than individual markets, e.g. an election rather than each candidate. Example options: limit=20, offset=0, order=volume. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "polymarket" and capability "events". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>

  • Market

    Use Polymarket (polymarket) from fastCRW Pergamon, capability "Market" (market). You have a market id and need its outcomes and token ids before pricing anything. Example options: marketId=253591. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "polymarket" and capability "market". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>