Fact Checker — Verify Claims with Web Evidence

AI-powered fact-checking API for AI agents.

CommunityRequires local installNo sign-inGlobalFreeRead-only
This server only runs on your computer. It cannot be added to Claude or ChatGPT web. See the project docs for installation.

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    AI-powered fact-checking API for AI agents. Verify any factual claim with web evidence: searches multiple sources, assesses credibility, provides supporting/contradicting URLs, and returns confidence level (confirmed/likely/unverified/false).

    Tools: research_check_fact.

    Use this before repeating claims, for content moderation, or building trustworthy AI systems. Essential for reducing hallucinations. IMPORTANT: For web search without fact assessment, use web_search_query.

    Returns: {verdict, confidence, sources[], evidence[]}. No API key required — x402 micropayment $0.005/call on Base L2.

    Requires a local install: run the server on your machine, then point your client at it.

    Tools not fetched yet: the server requires sign-in; the list appears after a manual check.