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Scheduled launch — Aug 28, 2026

Lenz is listed on AI Kaptan and will enter the daily launch competition on that day. Community upvotes open on launch day.

Lenz
Artificial Intelligence
Freemium

Lenz

Independent, multi-model fact-checking API for AI workflows and publishing pipelines. Extracts verifiable claims, researches sources, runs adversarial LLM debate, and returns scored verdicts with audit trails.

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Rating
0
Reviews
0
Upvotes
about 3 hours ago
Listed
Artificial Intelligence
Fact Checking
LLM
Hallucination Detection
API
Developer Tools
Automated Workflows
Tool information
Provider
Lenz IO
Platforms
Web
API
CLI
Languages
English
Python
TypeScript
API Available
Yes
Added to directory
about 3 hours ago
Last updated
about 3 hours ago
Rating
Not available
Pricing
Freemium

About Lenz

What the tool does and who it's for

Lenz is an independent, multi-model fact-checking API designed for AI workflows, publishing pipelines, and products that cannot afford to hallucinate. It processes text by extracting individual verifiable claims, searching independent sources, facilitating an adversarial debate across rival AI models, and running the evidence through an adjudication panel. Each verification outputs a scored verdict (ranging from True to False with a 1–10 score) along with complete source citations, opposing-side debate steps, and panel reasoning for audit compliance. Lenz provides four primary API primitives (/extract, /assess, /verify, and /ask) alongside an MCP server integration for AI assistants like Claude Desktop, Cursor, and ChatGPT. It is also accessible through a web-based Workbench interface for editorial teams.

Key capabilities

Claim Extraction: Automatically identifies and splits text into atomic, verifiable factual claims.
Multi-Model Adversarial Debate: Uses frontier LLMs from rival vendors taking opposing sides to evaluate evidence.
Panel Adjudication: Passes researched evidence through independent reviewers to issue a scored verdict (1-10).
Full Audit Trail: Provides complete trace of claim framing, graded independent sources, citations, and reviewer reasoning.
Four API Primitives: Includes /extract, /assess (fast 3-model verdict), /verify (deep 8-model pipeline), and /ask (follow-up Q&A).
MCP Server Integration: Remote MCP server support for Claude Desktop, Claude Code, Cursor, and ChatGPT.
Editor Workbench: Browser-based UI to submit claims, review evidence, and store verification libraries.
Typed SDKs & CLI: Native Python and TypeScript libraries as well as a command-line interface.

Pricing

Freemium — plans below

Free

$0

  • 1,000 /extract calls per day
  • Prototype support with no credit card required
  • Keyless public API & open-source SDK access

Developer

Most popular

$99/mo ($999/yr annual)

  • 1,000 /extract calls per day
  • 5,000 /assess calls per month
  • 500 /verify calls per month
  • 1,000 /ask calls per month
  • Self-serve access

Scale

$399/mo ($3,990/yr annual)

  • 1,000 /extract calls per day
  • 20,000 /assess calls per month
  • 2,000 /verify calls per month
  • 4,000 /ask calls per month
  • Designed for production integrations

Enterprise

Contact sales

  • Volume beyond Scale tier
  • Custom SLAs
  • White-label options
  • Dedicated integration support

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