Lenz

Lenz is an AI fact-checking API built for products that cannot afford to hallucinate. It extracts verifiable claims from any text, then checks each one through a multi-stage pipeline: searching independent sources, running adversarial debate across multiple models, and routing through a review panel. Every verdict comes with full source citations, reasoning chains, and confidence scores.

Most AI tools give you one model's best guess from memory. Lenz ensures no single model's blind spots drive the conclusion. On 23 percent of real-world claims, frontier models disagree significantly — Lenz is built to catch exactly those cases.

Available as a REST API, MCP server, CLI, and integrations for n8n and Zapier. Key endpoints include /extract for claim extraction, /assess for quick checks, /verify for the full deep pipeline, and /ask for follow-up questions. Free tier available at lenz.io/ph.

Built for newsrooms, legal tech, financial analysis, and any workflow where factual accuracy is non-negotiable.