x402 Notary MCP Server: Install & Setup

Install x402 Notary in Claude Code

Claude Code

claude mcp add x402-notary -- npx -y @forgemeshlabs/x402-notary-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "x402-notary": {
      "command": "npx",
      "args": [
        "-y",
        "@forgemeshlabs/x402-notary-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the x402 Notary MCP server do?

Notarize AI model outputs with signed Ed25519 attestations, SHA-256 content hashes and Merkle anchoring on Base or Solana, paid via x402.

Is the x402 Notary MCP server free?

Probably not entirely. The listing mentions pay-per-call, credits or a subscription. Check the provider for current pricing.

Does x402 Notary run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add x402 Notary to Claude Code?

Run: claude mcp add x402-notary -- npx -y @forgemeshlabs/x402-notary-mcp

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