F
Fact Verification MCP
Verify claims with verdict, confidence & cited sources; batch verify, source checks, daily brief.
Quick Install
Automated & IDE SetupCopy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.
Manual Client & Custom JSON ConfigExpand JSON ▾
Install Config Generator
Choose your client
💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)
Capabilities & Tool Schemas (6)
Inspect callable tools, capabilities, and parameters exposed to AI agents by Fact Verification MCP.
verify_claimVerify a claim → verdict, confidence, cited sources, explanation
batch_verifyVerify many claims in one call
source_checkAssess a source URL — domain age (RDAP), trust signals, bias indicators
daily_briefCurated daily brief — top disputed/most-verified claims, trending topics
brief_summaryStructured top-5 signals from today's brief — a cheap sample of `daily_brief
mint_infoFoundryNet Data Network attestation info
Documentation Overview
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
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 |
brief_summary | $0.50 | Structured top-5 signals from today's brief — a cheap sample of daily_brief |
mint_info | free | FoundryNet 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 returnunverifiablewith 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.
Related MCP Servers
Frequently Asked Questions about Fact Verification MCP
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