mcpbeat

Fact Checker API MCP Server

io.github.Br0ski777/fact-checker
answering

Fact Checker API is answering right now. Last checked 8 min ago. It exposes 1 tools. Last commit 19 Jul 2026.

Verify claims with web evidence. Returns sources and verdict. x402 micropayment.

Uptime history 39 hours of history
39 hours agonow
100.0%
Uptime 24h
91 of 91 checks
1
Tools
read from the server
28 ms
Response time
average over 24h
0
Stars
last commit 19 Jul 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add fact-checker --transport http https://fact-checker.api.klymax402.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "fact-checker": {
      "url": "https://fact-checker.api.klymax402.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.fact-checker]
url = "https://fact-checker.api.klymax402.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "fact-checker": {
      "url": "https://fact-checker.api.klymax402.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "fact-checker": {
      "url": "https://fact-checker.api.klymax402.com/mcp"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

research
research_check_fact
Use this when you need to verify a factual claim, check if a statement is true, or find evidence supporting or contradicting a claim. Accepts a claim text and returns relevant web snippets, source URLs, and a confidence assessment. Do NOT use for general web scraping — use web_scrape_to_markdown instead. Do NOT use for SEO analysis — use seo_audit_page instead. Do NOT use for sentiment analysis — use sentiment_analyzer instead.

Endpoints

URLTransportStateLatencyChecked
https://fact-checker.api.klymax402.com/mcp sse answering 27 ms 8 min ago

Fact Checker API — questions

Answers built from our own checks of this server.

What can Fact Checker API do?
It exposes 1 tools, read directly from the server on our last check. Among them: research_check_fact. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Fact Checker API working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 28 ms. The bar chart above shows every period we have measured.
How do I connect Fact Checker API?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Fact Checker API need an API key?
No. Fact Checker API completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Fact Checker API?
It answers our handshake in 28 ms on average, which is faster than 99% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Fact Checker API open source?
Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.