MCP server

Lenz Fact-Check Official

io.lenz/fact-check

Checked 26 Oct 2026, 08:29 UTC · It answered and asked for a sign-in

Check the factual claims in a draft or an answer: a quick verdict, or a deep check with sources.

Signs in with your accountVerified publisher: lenz.io

https://lenz.io/mcp

At a glance

Type: MCP server
Publisher: lenz.io (verified by the MCP Registry)
Status: Signs in with your account
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http fact-check https://lenz.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.fact-check]
url = "https://lenz.io/mcp"

Gemini CLI

{"mcpServers":{"fact-check":{"httpUrl":"https://lenz.io/mcp"}}}

Cursor

{"mcpServers":{"fact-check":{"url":"https://lenz.io/mcp"}}}

VS Code

{"servers":{"fact-check":{"type":"http","url":"https://lenz.io/mcp"}}}

Antigravity

agy mcp add fact-check https://lenz.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"fact-check","server_url":"https://lenz.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"fact-check","server_url":"https://lenz.io/mcp"}

Signs in with your account: your agent app opens a sign-in page the first time you use it.

Fidenta Verify
Independent fact-checking for AI answers: a verdict and sources for every claim.
Groundcheck
Verify claims, resolve FIGI identity, extract claims, and sign x402 delivery receipts over MCP.
Andreax
270 pay-per-call AI tools for agents, paid via x402 (USDC on Base). No signup, no API keys.
Citiview Agent Market
186 pay-per-call tools: search, LLMs, UK KYB, FRED, Census, maps, crypto. x402 USDC.
Claim Grounding
Fact-check AI answers with cited sources. Pay per call in USDC on Base via x402.
ShearQuery — Barber & Beauty Industry Data
Barber & cosmetology exam pass rates, booth rent with open chairs, and Texas licensee counts
Bob Research Tools
Paid web research, news, prediction-market evidence, company briefs and fact-checks (x402 USDC)
MONEYGRID
Four x402 tools: endpoint checks, extraction, evidence verification, domain intelligence.

[![AptLynx](https://aptlynx.net/badge/io.lenz/fact-check.svg)](https://aptlynx.net/servers/io.lenz/fact-check)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents