X402 Presign Guard MCP Server: Install & Setup

Install X402 Presign Guard in Claude Code

Claude Code

claude mcp add x402-presign-guard -- npx -y x402-presign-guard

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

{
  "mcpServers": {
    "x402-presign-guard": {
      "command": "npx",
      "args": [
        "-y",
        "x402-presign-guard"
      ]
    }
  }
}

Frequently asked questions

What does the X402 Presign Guard MCP server do?

Pre-sign EVM tx/approval safety for AI agents: decode calldata, flag drainers, return GO/HOLD/BLOCK.

Is the X402 Presign Guard MCP server free?

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

Does X402 Presign Guard 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 Presign Guard to Claude Code?

Run: claude mcp add x402-presign-guard -- npx -y x402-presign-guard

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