Yes, Fact Check is free to use.

How do I install Fact Check?

Fact Check is a remote plugin. You do not need to install anything locally. Add the server URL to your AI app's MCP configuration and you are ready to go.

Is Fact Check safe to use?

Fact Check was flagged by MCP Marketplace's security scan, scoring 4.5/10 (high risk). It has 4 high or critical findings to review. Review the security report on this page carefully before installing it.

What AI apps work with Fact Check?

Fact Check uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

Back to Browse

Fact Check MCP Server

by FoundryNet

Developer ToolsUse Caution4.5MCP RegistryRemote

Free

Server data from the Official MCP Registry

Verify claims with verdict, confidence & cited sources; batch verify, source checks, daily brief.

About

Verify claims with verdict, confidence & cited sources; batch verify, source checks, daily brief.

Remote endpoints: streamable-http: https://fact-check-mcp-production.up.railway.app/mcp

Security Report

4.5

Use Caution4.5High Risk

Valid MCP server (1 strong, 1 medium validity signals). 5 known CVEs in dependencies (1 critical, 3 high severity) Imported from the Official MCP Registry.

Endpoint verified · Open access · 5 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

file_system

Check that this permission is expected for this type of plugin.

env_vars

Check that this permission is expected for this type of plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

How to Connect

Remote Plugin

No local installation needed. Your AI client connects to the remote endpoint directly.

Add this to your MCP configuration to connect:

{
  "mcpServers": {
    "io-github-foundrynet-fact-check-mcp": {
      "url": "https://fact-check-mcp-production.up.railway.app/mcp"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

Fact Verification MCP

Fact verification for AI agents — give it a claim, get a verdict (supported / disputed / unverifiable) with a 0-100 confidence and cited sources. It classifies each claim's domain and cross-references the FoundryNet Data Network plus a general web search.

Part of the FoundryNet Data Network. Attest your agent's verification results with MINT Protocol. See also: financial-signals-mcp, cyber-intel-mcp, patent-intel-mcp, gov-contracts-mcp, compliance-mcp, brand-intel-mcp, weather-intel-mcp, academic-intel-mcp, oss-intel-mcp, social-intel-mcp.

Connect

MCP endpoint (Streamable HTTP): https://fact-check-mcp-production.up.railway.app/mcp
Registry: io.github.FoundryNet/fact-check-mcp
Agent card: https://fact-check-mcp-production.up.railway.app/.well-known/agent-card.json

Claude Desktop / Cursor / Claude Code

claude mcp add --transport http fact-check https://fact-check-mcp-production.up.railway.app/mcp

{ "mcpServers": { "fact-check": { "url": "https://fact-check-mcp-production.up.railway.app/mcp" } } }

Tools

Tool	Price	What it does
`verify_claim`	$0.02	Verify a claim → verdict, confidence, cited sources, explanation
`batch_verify`	$0.01/claim (min $0.05)	Verify many claims in one call
`source_check`	$0.01	Assess a source URL — domain age (RDAP), trust signals, bias indicators
`daily_brief`	$5	Curated daily brief — top disputed/most-verified claims, trending topics
`mint_info`	free	FoundryNet Data Network + MINT Protocol

Free tier: 10 verifications/day per agent. Then x402: the tool returns an HTTP-402 with a Solana USDC payment memo — pay it, re-call with the same args plus payment_tx=<signature>. An Authorization: Bearer fnet_… key bypasses the paywall.

How it works

Each claim is classified by domain and cross-referenced against the most relevant FoundryNet data source and a general web search:

company claims → brand-intel-mcp
finance claims → financial-signals-mcp
patents claims → patent-intel-mcp
regulation claims → compliance-mcp

The verdict is synthesized from source agreement and returned with the citations that drove it. Results are cached for 24h (keyed by a normalized-claim hash) and carry a MINT provenance attestation so a buyer can verify the result was produced by this server, unaltered.

The general web-search backend needs a WEB_SEARCH_API_KEY (Brave Search API). Without it, claims with no FoundryNet corroboration return unverifiable with a note rather than a guess.

Sources

On demand: a general web search (Brave Search API) + the FoundryNet Data Network sibling servers (called over their public MCP endpoints). Source-credibility checks use keyless RDAP for domain age. Cached in a standalone Supabase project.

Discovery

MCP registry: io.github.FoundryNet/fact-check-mcp

Built by FoundryNet · hello@foundrynet.io

Live network activity

Live feed: mint.foundrynet.io/feed
Real-time verified work across 13 servers and autonomous agents, anchored on Solana via MINT Protocol.

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Fact Check MCP Server

About

Security Report

Findings (5)Action required

Permissions Required

How to Connect

Documentation

Fact Verification MCP

Connect

Claude Desktop / Cursor / Claude Code

Tools

How it works

Sources

Discovery

Live network activity

Reviews

No reviews yet

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