Cross-venue prediction markets for AI agents: Polymarket + Kalshi, costed and attributed
To add polymarket-kalshi-trading to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 4 environment variables, listed below.
Install
uvx oddsrail@0.19.0Environment variables
ODDSRAIL_DRY_RUNSet in your MCP configODDSRAIL_BUILDER_CODESet in your MCP configPOLYMARKET_PRIVATE_KEYSet in your MCP configPOLYMARKET_WALLET_ADDRESSSet in your MCP configInstall with your client
claude mcp add polymarket-kalshi-trading --env ODDSRAIL_DRY_RUN=<YOUR_ODDSRAIL_DRY_RUN> --env ODDSRAIL_BUILDER_CODE=<YOUR_ODDSRAIL_BUILDER_CODE> --env POLYMARKET_PRIVATE_KEY=<YOUR_POLYMARKET_PRIVATE_KEY> --env POLYMARKET_WALLET_ADDRESS=<YOUR_POLYMARKET_WALLET_ADDRESS> -- uvx oddsrail@0.19.0
Run this in a terminal to add the server to Claude Code.
What this does
polymarket-kalshi-trading exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
ODDSRAIL_DRY_RUN ODDSRAIL_BUILDER_CODE POLYMARKET_PRIVATE_KEY POLYMARKET_WALLET_ADDRESS
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install polymarket-kalshi-trading?
Run the Claude Code command in the install section to add polymarket-kalshi-trading to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with polymarket-kalshi-trading?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to polymarket-kalshi-trading as well.
Does polymarket-kalshi-trading need an API key?
Yes. Before it can run, set these environment variables: ODDSRAIL_DRY_RUN, ODDSRAIL_BUILDER_CODE, POLYMARKET_PRIVATE_KEY, POLYMARKET_WALLET_ADDRESS. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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