footnote-mcp: Open-Source Python Tool That Verifies Claims Against Web Sources

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A developer has released footnote-mcp, a Python-based MCP server designed to verify factual claims against web sources, installable via pip, Docker, or pipx with no API keys required. The tool's core function, evidence_entailment, analyzes a claim alongside a source text and determines whether the claim is supported, unsupported, or contradicted. It uses a heuristic backend for numeric and factual claims, achieving 100% accuracy on a 15-item benchmark, and an optional local LLM via Ollama for semantic cases, bringing overall accuracy to 83% across 18 test cases. Additional tools allow users to cross-check claims across multiple sources, pinpoint supporting sentences, and generate structured research reports with query and verification details. The project is open source and available on GitHub, with the developer inviting community contributions to expand the verification benchmark.

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