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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. 53 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 10 · avg 5 · +35% w/w
a month agotoday
53
Installs / week
npm · bellwether-mcp
0
Stars
0 open issues
12 Mar 2026
Last commit
no releases in 90 days
MIT
License
Python

What the code does

We read the source, 5 d ago · rules 995398eba69f

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": {
      "command": "npx",
      "args": [
        "-y",
        "bellwether-mcp"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.bellwether-mcp]
command = "npx"
args = ["-y", "bellwether-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "bellwether-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "bellwether-mcp"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "bellwether-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "bellwether-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: BELLWETHER_API_KEY (Optional API key for authenticated access).

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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 53 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 in the form 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 53 times in the last week. Week over week that is +35%. 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?
Yes — it is published under the MIT licence, written in Python and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.