io.github.whitmorelabs/polymarket-mcp
io.github.whitmorelabs/polymarket-mcp
Is the io.github.whitmorelabs/polymarket-mcp MCP server down? Yes. It has given no valid answer since 2026-10-18: crashed on start.
Trading intelligence tools for Polymarket: slippage, liquidity, arbitrage, price feeds
crashed on start down since 2026-10-18 · probed 2026-11-14 · unchanged since 2026-11-01
MCP error -32000: Connection closed ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp
- Run it
- uvx polymarket-trading-mcp@0.1.2 (stdio, probed in a container with the network off)
- Host
- pypi.org
- Repository
- https://github.com/whitmorelabs/polymarket-mcp
- Registry
- active, updated 2026-03-29 · registry entry
Compare this server with others.
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Servers that mention polymarket.
- Liquid Agent ai.liquidagent.api/liquid-agent · alive
- app.oddsrail/polymarket-kalshi-trading · needs auth
- cc.ticktape/mcp · alive
- Crosswire — Polymarket & Kalshi Arbitrage com.crosswire-api/crosswire-polymarket-kalshi-arbitrage · alive
- DepthFeed com.depthfeed/depthfeed · alive
- EloEdge: Kalshi model probabilities com.eloedge/kalshi-prediction-markets · needs auth
- EloEdge Data: prediction-market and price history com.eloedge/prediction-market-data · needs auth
- Enclave402 com.enclave402/enclave402 · not found
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- No valid answer since 2026-10-18, in every probe since then.
- The package stops at the import of FastMCP from mcp.server.fastmcp. mcp 2.0, the Python SDK of 28 July 2026, renamed FastMCP to MCPServer, and a plain install gets mcp 2.x. Pin mcp<2 in the dependencies, or move to MCPServer as the SDK's migration guide says. The error output is above.
The cause and the fix, with the code before and after: ModuleNotFoundError: No module named 'mcp.server.fastmcp'