facts402: x402 API finder + fact checks

com.facts402/facts402-mcp

Find the right paid x402 API, plus fact checks: IBAN, EU VAT, OFAC sanctions, LEI, FX

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "facts402-mcp": {
      "command": "uvx",
      "args": [
        "facts402-mcp"
      ],
      "env": {
        "X402_PRIVATE_KEY": "<your X402_PRIVATE_KEY>",
        "X402_MAX_PER_CALL_USD": "0.30",
        "X402_SESSION_BUDGET_USD": "2.00"
      }
    }
  }
}
Environment variables
  • X402_PRIVATE_KEYsecretPrivate key of your own Base mainnet wallet holding a little USDC. Optional: without it only the free tools work.
  • X402_MAX_PER_CALL_USDMost a single tool call may pay, in USD
  • X402_SESSION_BUDGET_USDMost the server may spend until it restarts, in USD

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
AI & ML
Version
0.1.1
Registry
active
Published
11/1/2026

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