mcpbeat Sign in

Simmer MCP Server

local only

Simmer runs on your own machine — the client starts it, so there is no endpoint to ping. 375 installs a week from npm. Last commit 17 Sep 2026.

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

Installs per day peak 36 · avg 12 · -30% w/w
a month agotoday
375
Installs / week
npm · simmer-mcp
48
Stars
12 open issues
17 Sep 2026
Last commit
0 releases in 90 days
MIT
License
Python

What the code does

We read the source, 21 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

File ships in the package but is absent from the source [пакет] bundled-skills/preflight/preflight.py:1
этот файл ставится пользователю, но в репозитории его нет
  const skillPath = path.join(skill.skillDir, skill.entrypoint);
    const child = spawn(opts.file, opts.args, {
        proc = subprocess.run(
In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Sends data to a third-party sink .github/workflows/main-red-canary.yml:64
            "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add simmer-mcp -- npx -y simmer-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "simmer-mcp": {
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.simmer-mcp]
command = "npx"
args = ["-y", "simmer-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "simmer-mcp": {
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "simmer-mcp": {
      "args": [
        "-y",
        "simmer-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: SIMMER_API_KEY (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.). The author declared them in the registry entry; get the values from the project itself.

Alternatives to Simmer

same job, measured the same way
MCP Server Kalshi
by 9crusher

MCP server for end-to-end trading on Kalshi prediction markets: discover, research, trade.

242 installs/wk local only
EventTrader
by eventtrader

Prediction markets with on-chain settlement — trade, score AI nativeness, clone agents

local only
One Search MCP
by yokingma

Web search, URL discovery, scraping & extraction with agent-browser and search providers

173 installs/wk local only
Skillflow
by rafsilva85

Search, discover, and install 500+ AI agent skills from the SkillFlow marketplace.

45 installs/wk local only
Blockrun MCP
by blockrunai

Web search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.

554 installs/wk local only
Kalshi
by yakub268

Search, analyze, and trade Kalshi prediction markets through Claude Desktop

66 installs/wk local only
C
Pariflow Agent
by pariflow

Search prediction markets, preview trades, and place explicitly confirmed Pariflow orders.

26 installs/wk local only
Discovery
by nexbid

Search and discover advertiser products through an open marketplace for AI agents.

19 tools answering

Simmer — questions

Answers built from our own checks of this server.

Why is there no uptime for Simmer?
Simmer runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package simmer-mcp was installed 375 times last week.
How do I connect Simmer?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls simmer-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Simmer?
The npm package simmer-mcp was installed 375 times in the last week. Week over week that is -30%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Simmer open source?
Yes — it is published under the MIT licence, written in Python, 48 stars on GitHub and 12 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.