Fact Checker API

About Fact Checker API

Use Fact Checker API with your agent

claude mcp add --transport sse fact-checker-api https://fact-checker.api.klymax402.com/mcp

{
  "mcpServers": {
    "fact-checker-api": {
      "url": "https://fact-checker.api.klymax402.com/mcp"
    }
  }
}

Frequently asked questions

What is Fact Checker API?

Fact Checker API is an MCP (Model Context Protocol) server by br0ski777 in the Finance category. Verify claims with web evidence. Returns sources and verdict. x402 micropayment.

How do I connect Fact Checker API to Claude, Cursor, or another MCP client?

Fact Checker API is a remote MCP server — add its endpoint (https://fact-checker.api.klymax402.com/mcp) to your client's MCP configuration (for example with "claude mcp add", or under "mcpServers" in Cursor's mcp.json) and restart the client.

Is Fact Checker API open source?

Yes — the source code is public at github.com/br0ski777/fact-checker-x402.

Can AI agents pay to use Fact Checker API?

Not yet through Loomal — Fact Checker API is listed as a free directory entry. If its maintainer verifies ownership, they can set per-call USDC pricing that agents pay over x402, with settlement on Base.