Bellwether MCP server

Bellwether is an MCP server with 3 tools an agent can call, among them get_market, list_markets, matching_markets. It answers at https://api.bellwether.markets/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 12 September 2026; the last check, on 24 October 2026, succeeded.

Live Kalshi + Polymarket prediction-market data and cross-venue arbitrage spreads, one schema.

Description as the publisher wrote it.

The 3 tools Bellwether offers

Add Bellwether to your AI client

Every block below points at https://api.bellwether.markets/mcp. Pick your client and copy.

claude mcp add --transport http bellwether https://api.bellwether.markets/mcp

{
  "mcpServers": {
    "bellwether": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://api.bellwether.markets/mcp"]
    }
  }
}

{
  "mcpServers": {
    "bellwether": {
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

{
  "servers": {
    "bellwether": {
      "type": "http",
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

{
  "context_servers": {
    "bellwether": {
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

{
  "mcpServers": {
    "bellwether": {
      "serverUrl": "https://api.bellwether.markets/mcp"
    }
  }
}

{
  "mcpServers": {
    "bellwether": {
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

name: Bellwether
version: 0.0.1
schema: v1
mcpServers:
  - name: Bellwether
    type: streamable-http
    url: https://api.bellwether.markets/mcp

{
  "mcpServers": {
    "bellwether": {
      "httpUrl": "https://api.bellwether.markets/mcp"
    }
  }
}

{
  "mcpServers": {
    "bellwether": {
      "type": "http",
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

{
  "mcpServers": {
    "bellwether": {
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

goose://extension?url=https%3A%2F%2Fapi.bellwether.markets%2Fmcp&type=streamable_http&id=bellwether&name=Bellwether

Is Bellwether up right now?

It answered our last check on 24 October 2026 in 75 ms. Over 6 checks since 12 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to Bellwether

Questions about Bellwether

Is there an official Bellwether MCP server?

Yes. It is published by bellwether.markets and served from api.bellwether.markets, the vendor's own domain: https://api.bellwether.markets/mcp.

How many tools does Bellwether have?

3, as returned by the server's own tools/list on 22 September 2026: get_market, list_markets, matching_markets.

Is Bellwether down?

It answered our last check on 24 October 2026 in 75 ms. Over 6 checks since 12 September 2026 it answered 6.

How do I add Bellwether to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://api.bellwether.markets/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Bellwether need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: markets.bellwether. Endpoint host: api.bellwether.markets. ARD identifier: urn:air:markets.bellwether:mcp:prediction-markets. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.