Odel
Fact Verification MCP

Fact Verification MCP

@foundrynetPythonMITUpdated 3w ago

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

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Server endpointStreamable HTTPProbe failed
https://fact-check-mcp-production.up.railway.app/mcp

This is the third-party server itself — Odel doesn't run it. Hitting this URL directly talks straight to the upstream server with no auth or proxying. Connect through Odel to front it with managed auth.

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. Verification results carry a verifiable provenance attestation. 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

ToolPriceWhat it does
verify_claim$0.02Verify a claim → verdict, confidence, cited sources, explanation
batch_verify$0.01/claim (min $0.05)Verify many claims in one call
source_check$0.01Assess a source URL — domain age (RDAP), trust signals, bias indicators
daily_brief$5Curated daily brief — top disputed/most-verified claims, trending topics
brief_summary$0.50Structured top-5 signals from today's brief — a cheap sample of daily_brief
mint_infofreeFoundryNet Data Network attestation info

Free tier: 10 verifications/day per agent. Then metered: the tool returns an HTTP-402 payment challenge — 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 verifiable 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 · forge@foundrynet.io

Live network activity

Real-time verified work across 17 servers and autonomous agents. See foundrynet.io.