Lenz Fact Check

Created By
lenzhq2 days ago
Overview

Lenz is a fact-checking platform. It takes a factual claim, runs it through a multi-model pipeline (framing → research → debate → panel review → conclusion) against independent sources, and returns a verdict with a confidence level. This is the official remote MCP server — point any MCP client at https://lenz.io/mcp.

It verifies claims against the open web, independent of whatever context your model was given — so it complements retrieval/groundedness checkers rather than replacing them.

Tools

ToolWhat it does
assessFast verdict (~5–10s) via a 3-model panel — the default for checking a claim.
verifyDeep, multi-step investigation (~90s) for high-stakes claims. Returns a task_id to poll.
get_verificationRetrieve or poll a verify result.
selectResolve a multi-claim / clarification interrupt.
askAsk a grounded follow-up on a completed verify.
check_usageRemaining quota for your key.

Verdicts are directional, not absolute — confidence is bucketed, with a caveat.

Connect

  • Hosted, no install: point your client at https://lenz.io/mcp.
  • Auth: OAuth (no key) or a free Lenz API key (Authorization: Bearer lenz_…).
  • Transport: Streamable HTTP.
{ 
  "mcpServers": {
    "lenz": { 
      "type": "http",
      "url": "https://lenz.io/mcp"
    } 
  }
}

Get a free key at lenz.io/api-integration · Setup guide · GitHub

Server Config

{
  "mcpServers": {
    "lenz": {
      "type": "http",
      "url": "https://lenz.io/mcp"
    }
  }
}
Project Info
Created At
2 days ago
Updated At
2 days ago
Author Name
lenzhq
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