Skip to content

x402 MCP Starter

by kadopi · remote · no sign-in to list tools · v0.2.0 · published by GitHub user kadopi

Free self-hosted x402 USDC billing for Cloudflare MCP servers, with a Base Sepolia test endpoint.

Read only
CompareRegistry entry

2 tools: 2 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http x402-starter https://x402-mcp-starter.kadopi.workers.dev/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Only reads 2Claude Code: allow
  • get_paid_sampleFixed-price reference path: confirms that an x402-aware MCP client can pay and receive a receipt.No findings

    Why it is in this group

    • The name "get_paid_sample" says "get": a word for reading.
    Description, as the server wrote it
    Fixed-price reference path: confirms that an x402-aware MCP client can pay and receive a receipt.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • validate_x402_configFree: checks Base USDC, price, amount, recipient, and facilitator settings before you deploy an x402-paid MCP tool.No findings

    Why it is in this group

    • The name "validate_x402_config" says "validate": a word for reading.
    Description, as the server wrote it
    Free: checks Base USDC, price, amount, recipient, and facilitator settings before you deploy an x402-paid MCP tool.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http x402-starter https://x402-mcp-starter.kadopi.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__x402-starter__validate_x402_config",
      "mcp__x402-starter__get_paid_sample"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as x402-starter. Review it before you use it.