fact_check

Active

declared in 0.1.0

Verify a factual claim against authoritative sources (Wikipedia, Wikidata, Crossref academic citations). Returns a verdict ('supported' / 'contradicted' / 'mixed' / 'unverified'), a 0–1 confidence score, and the list of sources with excerpts. Use this when an agent is about to assert a fact it isn't 100% sure of, or when post-processing LLM output to flag possibly-hallucinated claims.

Parameters schema

{
  "type": "object",
  "required": [
    "claim"
  ],
  "properties": {
    "claim": {
      "type": "string",
      "description": "A single factual claim, ideally one sentence. Longer text is truncated to 200 chars."
    }
  }
}

What this tool wraps· 3 endpoints

min confidence0.70 0.50

Data resourceCrossref REST API
Crossref · scholarly-metadata
name mention0.70
Data resourceWikidata SPARQL Service
Wikimedia · knowledge
name mention0.65
Data resourceWikipedia REST API
Wikimedia · knowledge
name mention0.60

Parent server

verification-mcp

https://github.com/guptaprakhariitr/verification-mcp

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