MCP server for Kalshi prediction markets: native RSA-PSS auth, rate limiting, demo/prod safety.
To add Kalshi Prediction Markets 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 6 environment variables, listed below.
Install
uvx kalshi-mcp-server@0.1.8Environment variables
KALSHI_API_KEY_IDSet in your MCP configKALSHI_PRIVATE_KEY_PATHSet in your MCP configKALSHI_PRIVATE_KEY_PEMSet in your MCP configKALSHI_ENVSet in your MCP configKALSHI_ALLOW_PRODSet in your MCP configKALSHI_TRADING_ENABLEDSet in your MCP configInstall with your client
claude mcp add kalshi-prediction-markets --env KALSHI_API_KEY_ID=<YOUR_KALSHI_API_KEY_ID> --env KALSHI_PRIVATE_KEY_PATH=<YOUR_KALSHI_PRIVATE_KEY_PATH> --env KALSHI_PRIVATE_KEY_PEM=<YOUR_KALSHI_PRIVATE_KEY_PEM> --env KALSHI_ENV=<YOUR_KALSHI_ENV> --env KALSHI_ALLOW_PROD=<YOUR_KALSHI_ALLOW_PROD> --env KALSHI_TRADING_ENABLED=<YOUR_KALSHI_TRADING_ENABLED> -- uvx kalshi-mcp-server@0.1.8
Run this in a terminal to add the server to Claude Code.
What this does
Kalshi Prediction Markets 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:
KALSHI_API_KEY_ID KALSHI_PRIVATE_KEY_PATH KALSHI_PRIVATE_KEY_PEM KALSHI_ENV KALSHI_ALLOW_PROD KALSHI_TRADING_ENABLED
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Kalshi Prediction Markets?
Run the Claude Code command in the install section to add Kalshi Prediction Markets 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 Kalshi Prediction Markets?
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 Kalshi Prediction Markets as well.
Does Kalshi Prediction Markets need an API key?
Yes. Before it can run, set these environment variables: KALSHI_API_KEY_ID, KALSHI_PRIVATE_KEY_PATH, KALSHI_PRIVATE_KEY_PEM, KALSHI_ENV, KALSHI_ALLOW_PROD, KALSHI_TRADING_ENABLED. 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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