X402 Presign Guard MCP Server

by kaito3636 Your server? Claim it

local only

X402 Presign Guard runs on your own machine — the client starts it, so there is no endpoint to ping. 610 installs a week from npm. Last commit 24 Oct 2026.

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

Installs per day peak 476 · avg 17

a month agotoday

610

Installs / week

npm · x402-presign-guard

Stars

0 open issues

24 Oct 2026

Last commit

3 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check X402 Presign Guard every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

~/Library/Application Support/Claude/claude_desktop_config.json

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

~/.codex/config.toml

[mcp_servers.x402-presign-guard]
command = "npx"
args = ["-y", "x402-presign-guard"]

.cursor/mcp.json

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

.vscode/mcp.json

{
  "servers": {
    "x402-presign-guard": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "x402-presign-guard"
      ]
    }
  }
}

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X402 Presign Guard — questions

Answers built from our own checks of this server.

Why is there no uptime for X402 Presign Guard?

X402 Presign Guard runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package x402-presign-guard was installed 610 times last week.

How do I connect X402 Presign Guard?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls x402-presign-guard straight from npm; nothing to host, nothing to sign up for.

How many people use X402 Presign Guard?

The npm package x402-presign-guard was installed 610 times in the last week. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is X402 Presign Guard 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.