Simmer

MCP server · by adlai88

Developer Tools npm v3.3.2

Trade prediction markets with AI agents — skill discovery, autoresearch, and execution.

View source ↗ Website ↗ Generate config for multiple servers More servers

Install

Pin version registry version 3.3.2

npm
npx -y simmer-mcp

npm
npx -y simmer-mcp@3.3.2

Setup by client

Pick your client — the config below is generated for this server (local stdio). Copy respects the “Pin version” switch above.

claude_desktop_config.json

{
  "mcpServers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

{
  "mcpServers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp@3.3.2"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

Format verified against the official Claude Desktop docs ↗.

terminal

claude mcp add --env SIMMER_API_KEY=<YOUR_SIMMER_API_KEY> simmer-mcp -- npx -y simmer-mcp

claude mcp add --env SIMMER_API_KEY=<YOUR_SIMMER_API_KEY> simmer-mcp -- npx -y simmer-mcp@3.3.2

Format verified against the official Claude Code docs ↗.

.cursor/mcp.json

{
  "mcpServers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

{
  "mcpServers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp@3.3.2"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

Format verified against the official Cursor docs ↗.

.vscode/mcp.json

{
  "servers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp@3.3.2"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

Format verified against the official VS Code docs ↗.

mcp_config.json

{
  "mcpServers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

{
  "mcpServers": {
    "simmer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "simmer-mcp@3.3.2"
      ],
      "env": {
        "SIMMER_API_KEY": "<YOUR_SIMMER_API_KEY>"
      }
    }
  }
}

Format verified against the official Windsurf docs ↗.

Environment variables

Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.

SIMMER_API_KEY secret — Simmer API key (sk_live_...) from simmer.markets/dashboard. Required for Pro tools (autoresearch, trading, briefings). Free tools work without it.
SIMMER_MCP_ALLOW_LIVE — Set to 'true' to allow live trading via simmer_trade. Without this, all trades run in paper/sim mode.

GitHub

⭐ 50 stars · 最近更新于 17 天前 · MIT license

About this server

Simmer SDK Simmer is the leading prediction market harness for AI agents. Autonomous agents place trades on venues like Polymarket, Kalshi and Hyperliquid through a unified API — with self custody wallets, safety rails, and smart context. AI native trading platform — designed for autonomous agents…

Summary from the project README — github.com/SpartanLabsXyz/simmer-sdk

Distributed as npm, listed under Developer Tools. Review our MCP security guide before granting access to real data.

Frequently asked questions

What does the Simmer MCP server do?

How do I install Simmer?

Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.

Is Simmer free to use?

The MCP server itself is free to install. The source is public on https://github.com/SpartanLabsXyz/simmer-sdk. Any third-party service it calls may require its own API key and account.

Which clients support Simmer?

Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.

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