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Bellwether MCP Server

by bellwethermetrics Your server? Claim it
local only

Bellwether MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 47 installs a week from npm. Last commit 12 Mar 2026.

Live prediction market data from Polymarket and Kalshi with VWAP pricing and reportability.

Installs per day peak 26 · avg 8 · +10% w/w
a month agotoday
47
Installs / week
npm · bellwether-mcp
0
Stars
0 open issues
12 Mar 2026
Last commit
0 releases in 90 days
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.

    <script src="https://cdn.plot.ly/plotly-2.27.0.min.js"></script>
Page executes code built at runtime packages/website/globe.html:1281
            container.innerHTML = filteredMarkets.slice(0, 100).map(e => {

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 bellwether-mcp -- npx -y bellwether-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "bellwether-mcp": {
      "args": [
        "-y",
        "bellwether-mcp"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.bellwether-mcp]
command = "npx"
args = ["-y", "bellwether-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "bellwether-mcp": {
      "args": [
        "-y",
        "bellwether-mcp"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "bellwether-mcp": {
      "args": [
        "-y",
        "bellwether-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: BELLWETHER_API_KEY (Optional API key for authenticated access). The author declared them in the registry entry; get the values from the project itself.

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Bellwether MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Bellwether MCP?
Bellwether MCP 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 bellwether-mcp was installed 47 times last week.
How do I connect Bellwether MCP?
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 bellwether-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Bellwether MCP?
The npm package bellwether-mcp was installed 47 times in the last week. Week over week that is +10%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Bellwether MCP open source?
We cannot say either way: written in Python and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.