Lenz Fact Check
Description
[Lenz](https://lenz.io) is a fact-checking platform. It takes a factual claim, runs it through a multi-model pipeline (framing → research → debate → panel review → conclusion) against **independent sources**, and returns a verdict with a confidence level. This is the official…
About
[Lenz](https://lenz.io) is a fact-checking platform. It takes a factual claim, runs it through a multi-model pipeline (framing → research → debate → panel review → conclusion) against **independent sources**, and returns a verdict with a confidence level. This is the official **remote MCP server** — point any MCP…
Details
- Author
- lenzhq
- Downloads
- 243
- Categories
- Other
Jump to
- Multi-model pipeline (framing → research → debate → panel review → conclusion)
- Fast verdict via 3-model panel (assess) in ~5–10 seconds
- Deep investigation (verify) for high-stakes claims in ~90 seconds
- Follow-up grounded questions (ask) on completed verifications
- Resolves multi-claim or clarification interrupts (select)
- Remote, hosted service – no local install needed
Setting up with Highlight
This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:
- Download and install Highlight from highlightai.com/download
- Navigate to the plugins tab and select "Add Custom Plugin"
-
Configure the plugin with the settings below
Plugin Name
Lenz Fact CheckCommand (node, npx, python, etc.)Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
- Enable "Start Automatically" if you want the plugin to start when Highlight launches
From the repository
No installation is required. Point your MCP client to https://lenz.io/mcp with transport type http. Authentication is via OAuth or a free Lenz API key (Authorization: Bearer lenz_…). Use tools like assess for a fast verdict (~5–10s) or verify for a deep investigation (~90s) that returns a task_id to poll.
Claude Desktop / Cursor
Paste into your MCP client config file to install this server.
{
"mcpServers": {
"lenz fact check": {
"lenz": {
"type": "http",
"url": "https://lenz.io/mcp"
}
}
}
}McpServers
{
"lenz": {
"type": "http",
"url": "https://lenz.io/mcp"
}
}Lenz is a fact-checking platform. It takes a factual claim, runs it through a multi-model pipeline (framing → research → debate → panel review → conclusion) against
independent sources, and returns a verdict with a confidence level. This is the official remote MCP server — point any MCP client at https://lenz.io/mcp.
It verifies claims against the open web, independent of whatever context your model was given — so it complements retrieval/groundedness checkers rather than replacing them.
## Tools
| Tool | What it does |
|------|--------------|
| assess | Fast verdict (~5–10s) via a 3-model panel — the default for checking a claim. |
| verify | Deep, multi-step investigation (~90s) for high-stakes claims. Returns a task_id to poll. |
| get_verification | Retrieve or poll a verify result. |
| select | Resolve a multi-claim / clarification interrupt. |
| ask | Ask a grounded follow-up on a completed verify. |
| check_usage | Remaining quota for your key. |
Verdicts are directional, not absolute — confidence is bucketed, with a caveat.
## Connect
- Hosted, no install: point your client at https://lenz.io/mcp.
- Auth: OAuth (no key) or a free Lenz API key (Authorization: Bearer lenz_…).
- Transport: Streamable HTTP.
``json``
{
"mcpServers": {
"lenz": {
"type": "http",
"url": "https://lenz.io/mcp"
}
}
}
Get a free key at lenz.io/api-integration · Setup guide · GitHub
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