Lenz Fact-Check
Check the factual claims in a draft or an answer: a quick verdict, or a deep check with sources.
MCP server · by lenz.io
About
Lenz Fact-Check is an MCP server published by lenz.io. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-14.
What it asks for
- Runs remotely
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a remote MCP server
Built from what Official MCP Registry declares.
claude mcp add --transport http fact-check https://lenz.io/mcp
[mcp_servers.fact-check]
url = "https://lenz.io/mcp"
{
"mcpServers": {
"fact-check": {
"url": "https://lenz.io/mcp"
}
}
}
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.1.1 | Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Possibly the same plugin
Listings that share a signal with this one but not enough for us to treat them as the same product.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Check AI-written drafts against your source documents, with the passage behind every verdict.
-
mcp-factcheck io.github.carlisia/mcp-factcheck
An MCP server that validates content against MCP specification using semantic search and AI
-
Checks whether each cited source supports the claim it backs. Blinded human-first, local-first.
-
Fact-check AI answers with cited sources. Pay per call in USDC on Base via x402.
-
Independent fact-checking for AI answers: a verdict and sources for every claim.
-
kodiak com.azurecarbon/kodiak
Verifiable fact-checking: verdict, confidence, sources, and a tamper-evident certificate.
-
verity io.github.Clawdio777/verity
Real-time fact-checking MCP. Verifies claims against live sources with structured verdicts.
-
AI document verification: catch hallucinations, arithmetic errors, and field mismatches.
-
Free MCP tool: paste your writing, get a one-line diagnosis and a tightened rewrite.
-
mcp-v1 com.636865636b73756d/mcp-v1
Sub-cent factual claim verification against live data sources.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Connect AI assistants to Outline for document search, reading, and management
-
A comprehensive MCP server that provides Claude with private journaling, semantic search, resources, and guided prompts for reflection and learning
-
Edits any draft to remove the words, phrases, and structures that mark writing as AI output. Strips banned words like delve, unlock, leverage, robust, harness, and showcase (plus…
-
Mac & Windows: let ChatGPT, Claude & Cursor use your email, calendar, iMessage, Teams, files.
-
Remove signs of AI-generated writing from text and rewrite in the author's actual voice. Based on Wikipedia's Signs of AI Writing guide.
Has a listing on Claude Code: claude-plugins-official (5)
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
Search companies and contacts, enrich leads, find lookalikes, and get AI-ranked contact recommendations. Pre-built skills chain multiple ZoomInfo tools into complete B2B sales…
-
mcp-server io.github.cap-js/mcp-server
Model Context Protocol (MCP) server for AI-assisted development of CAP applications.
-
mdk-mcp-server io.github.SAP/mdk-mcp-server
Model Context Protocol (MCP) server for AI-assisted development of MDK applications.
-
Sanity content platform integration with MCP server, agent skills, and slash commands. Query and author content, build and optimize GROQ queries, design schemas, and set up Visual…
Has a listing on Claude: knowledge-work-plugins (5)
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
Search companies and contacts, enrich leads, find lookalikes, and get AI-ranked contact recommendations. Pre-built skills chain multiple ZoomInfo tools into complete B2B sales…
-
Speed up contract review, NDA triage, and compliance workflows for in-house legal teams. Draft legal briefs, organize precedent research, and manage institutional knowledge.
-
Sanity content platform integration with MCP server, agent skills, and slash commands. Query and author content, build and optimize GROQ queries, design schemas, and set up Visual…
-
Work in your GC AI legal knowledge base from Claude: upload documents, run review playbooks, and ask questions grounded in your own files, all as you.
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Granola MCP connects your meeting history to ChatGPT so your assistant can pull real context from past conversations while you work. Use MCP when you're already working on…
-
Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.
-
Consensus is the go-to MCP for academic research. Connect directly to 220M+ peer-reviewed papers to search, synthesize, and build structured research outputs from within your…
-
Install, open, and connect the signed ChatCut Desktop app from Codex.
-
The Dropbox plugin for ChatGPT connects your Dropbox files directly to ChatGPT. You can access files, save ChatGPT-generated content to Dropbox, and create sharing links without…
Has a listing on Community GitHub marketplaces (5)
-
Document reasoning checks: a helicopter view of claims and assumptions before handoff.
-
byakugan io.github.JayOfemi/byakugan
Private, on-device AI-text analysis including detection, AI-tell spans, and reuse overlap.
-
Find AI-writing patterns ("AI slop") in prose: not-X-but-Y contrasts, dramatic closers, chatbot leftovers, stock vocabulary, em-dash overuse. Deterministic linter, not an AI…
-
Fixes the names and jargon speech-to-text gets wrong before your agent acts on a dictated prompt.
-
Check an MCP server, skill or plugin before your agent uses it: tool text on record, changes graded.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
A runtime-portable 5-agent quality gate that adjudicates text artifacts before they ship. Five role-conditioned LLM deliberators run a 2-round async protocol with cross-read…
-
Safe BLE diagnostics, evidence workflows, and guarded automation for AI agents.
-
Complete toolkit for building Model Context Protocol (MCP) servers in TypeScript/Node.js using the official SDK. Includes instructions for best practices, a prompt for generating…
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
mcp-apps
Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.
-
workiq
Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
-
power-automate
Build, edit, run, and debug Power Automate cloud flows via the FlowAgent MCP server — connection lifecycle, surgical edits, copy across environments, run management, and validated…
Has a listing on Cursor: cursor/plugins (5)
-
Search company knowledge and draft verified answers.
-
Generate presentations, documents, and webpages.
-
Consult a stronger model before major decisions, when stuck, and before declaring done.
-
playwright-mcp io.github.microsoft/playwright-mcp
Playwright Tools for MCP
-
Iterative self-referential AI loops using the Ralph Wiggum technique.
Has a listing on Docker MCP Catalog (4)
-
The Official Model Context Protocol (MCP) server for Kagi Search & other tools.
-
tavily-mcp io.github.tavily-ai/tavily-mcp
MCP server for advanced web search using Tavily
-
Production-ready RAG service to search and retrieve data from your documents.
-
Discover and connect to a curated marketplace of MCP servers for extending AI agent capabilities.
Has a listing on Official MCP Registry (5)
-
Check AI-written drafts against your source documents, with the passage behind every verdict.
-
mcp-factcheck io.github.carlisia/mcp-factcheck
An MCP server that validates content against MCP specification using semantic search and AI
-
Checks whether each cited source supports the claim it backs. Blinded human-first, local-first.
-
Fact-check AI answers with cited sources. Pay per call in USDC on Base via x402.
-
Independent fact-checking for AI answers: a verdict and sources for every claim.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.