Lenz Fact-Check MCP server

Lenz Fact-Check is the official remote MCP server from lenz.io. It answers at https://lenz.io/mcp over streamable HTTP and asks you to sign in with your lenz.io account before it lists its tools, so your client opens a login the first time it connects. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 24 October 2026, got the sign-in challenge, so it is up.

Check the factual claims in a draft or an answer: a quick verdict, or a deep check with sources.

Description as the publisher wrote it.

What Lenz Fact-Check needs before it works

A sign-in. The server refused to list its tools to an anonymous client and answered with an authentication challenge, which is how an MCP server protected by OAuth behaves. Add it with one of the setups below; the first connection opens a login for your lenz.io account, and the tools appear once you have approved it.

Add Lenz Fact-Check to your AI client

Every block below points at https://lenz.io/mcp. Pick your client and copy.

claude mcp add --transport http lenz-fact-check https://lenz.io/mcp

{
  "mcpServers": {
    "lenz-fact-check": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://lenz.io/mcp"]
    }
  }
}

{
  "mcpServers": {
    "lenz-fact-check": {
      "url": "https://lenz.io/mcp"
    }
  }
}

{
  "servers": {
    "lenz-fact-check": {
      "type": "http",
      "url": "https://lenz.io/mcp"
    }
  }
}

{
  "context_servers": {
    "lenz-fact-check": {
      "url": "https://lenz.io/mcp"
    }
  }
}

{
  "mcpServers": {
    "lenz-fact-check": {
      "serverUrl": "https://lenz.io/mcp"
    }
  }
}

{
  "mcpServers": {
    "lenz-fact-check": {
      "url": "https://lenz.io/mcp"
    }
  }
}

name: Lenz Fact-Check
version: 0.0.1
schema: v1
mcpServers:
  - name: Lenz Fact-Check
    type: streamable-http
    url: https://lenz.io/mcp

{
  "mcpServers": {
    "lenz-fact-check": {
      "httpUrl": "https://lenz.io/mcp"
    }
  }
}

{
  "mcpServers": {
    "lenz-fact-check": {
      "type": "http",
      "url": "https://lenz.io/mcp"
    }
  }
}

{
  "mcpServers": {
    "lenz-fact-check": {
      "url": "https://lenz.io/mcp"
    }
  }
}

goose://extension?url=https%3A%2F%2Flenz.io%2Fmcp&type=streamable_http&id=lenz-fact-check&name=Lenz%20Fact-Check

Is Lenz Fact-Check up right now?

It answered our last check on 24 October 2026 in 192 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to Lenz Fact-Check

Questions about Lenz Fact-Check

Is there an official Lenz Fact-Check MCP server?

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

How do I sign in to Lenz Fact-Check?

Add the server with a setup above. The first time your client connects it opens the sign-in page for lenz.io; approve it and the tools load.

Is Lenz Fact-Check down?

It answered our last check on 24 October 2026 in 192 ms. Over 6 checks since 11 September 2026 it answered 6.

How do I add Lenz Fact-Check to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://lenz.io/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 Lenz Fact-Check need an API key?

It needs a sign-in rather than a key you paste: the server answered with an authentication challenge, so your client runs the login when it first connects.

Where this comes from

Publisher: io.lenz. Endpoint host: lenz.io. ARD identifier: urn:air:io.lenz:mcp:fact-check. 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.