- Lenz Fact Check
Overview
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.
{
"mcpServers": {
"lenz": {
"type": "http",
"url": "https://lenz.io/mcp"
}
}
}
Get a free key at lenz.io/api-integration · Setup guide · GitHub
Server Config
{
"mcpServers": {
"lenz": {
"type": "http",
"url": "https://lenz.io/mcp"
}
}
}Project Info
Created At
2 days agoUpdated At
2 days agoAuthor Name
lenzhqStar
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