Self-hosted MCP server for Kalshi prediction markets. Native RSA-PSS auth, token-bucket rate limiting, demo/prod safety controls. Designed to be forked and deployed.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add kalshi-prediction-markets --env KALSHI_API_KEY_ID='<KALSHI_API_KEY_ID>' --env KALSHI_PRIVATE_KEY_PEM='<KALSHI_PRIVATE_KEY_PEM>' -- uvx kalshi-mcp-server~/.codex/config.toml
[mcp_servers.kalshi-prediction-markets]
command = "uvx"
args = ["kalshi-mcp-server"]
env = { KALSHI_API_KEY_ID = "<KALSHI_API_KEY_ID>", KALSHI_PRIVATE_KEY_PEM = "<KALSHI_PRIVATE_KEY_PEM>" }
# codex mcp add kalshi-prediction-markets --env KALSHI_API_KEY_ID='<KALSHI_API_KEY_ID>' --env KALSHI_PRIVATE_KEY_PEM='<KALSHI_PRIVATE_KEY_PEM>' -- uvx kalshi-mcp-server~/.cursor/mcp.json
{
"mcpServers": {
"kalshi-prediction-markets": {
"command": "uvx",
"args": [
"kalshi-mcp-server"
],
"env": {
"KALSHI_API_KEY_ID": "<KALSHI_API_KEY_ID>",
"KALSHI_PRIVATE_KEY_PEM": "<KALSHI_PRIVATE_KEY_PEM>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"kalshi-prediction-markets": {
"type": "stdio",
"command": "uvx",
"args": [
"kalshi-mcp-server"
],
"env": {
"KALSHI_API_KEY_ID": "<KALSHI_API_KEY_ID>",
"KALSHI_PRIVATE_KEY_PEM": "<KALSHI_PRIVATE_KEY_PEM>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"kalshi-prediction-markets": {
"command": "uvx",
"args": [
"kalshi-mcp-server"
],
"env": {
"KALSHI_API_KEY_ID": "<KALSHI_API_KEY_ID>",
"KALSHI_PRIVATE_KEY_PEM": "<KALSHI_PRIVATE_KEY_PEM>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"kalshi-prediction-markets": {
"command": "uvx",
"args": [
"kalshi-mcp-server"
],
"env": {
"KALSHI_API_KEY_ID": "<KALSHI_API_KEY_ID>",
"KALSHI_PRIVATE_KEY_PEM": "<KALSHI_PRIVATE_KEY_PEM>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"kalshi-prediction-markets": {
"command": "uvx",
"args": [
"kalshi-mcp-server"
],
"env": {
"KALSHI_API_KEY_ID": "<KALSHI_API_KEY_ID>",
"KALSHI_PRIVATE_KEY_PEM": "<KALSHI_PRIVATE_KEY_PEM>"
}
}
}
}Environment variables
KALSHI_API_KEY_IDKALSHI_PRIVATE_KEY_PEM
Replace the placeholders with your own credentials and keep them out of version control.