x402 MCP Starter

io.github.kadopiPublished by GitHub account kadopiv0.2.0Updated Nov 2, 2026

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

VerifiedStreamable HTTPWeb executableFinanceDeveloper Tools

Overview

AI-generated overview

A remote x402 starter server that validates USDC payment configuration and offers a fixed-price paid sample call for testing x402 billing on Cloudflare.

What you can do
  • Validate x402 payment settings: check Base USDC, price, amount, recipient and facilitator configuration before deploying a paid MCP tool.
  • Exercise a paid path: call a fixed-price sample tool to confirm an x402-aware client can pay and receive a receipt.
When to use it
Useful when building or testing an x402-paid MCP server on Cloudflare and you want a quick check of payment configuration and a reference paid call before going live.
Requirements
A remote streamable HTTP endpoint; no packages, environment variables or headers are declared. An x402-aware MCP client able to pay is needed for the paid sample tool.
Before you install
The paid sample tool involves an actual USDC payment on Base, so calls may spend funds; the description mentions a Base Sepolia test endpoint, so confirm which network and recipient are in use before paying.

Installation

In SourceWeft

  1. Open x402 MCP Starter in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.kadopi%2Fx402-mcp-starter/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "x402-starter": {
      "type": "http",
      "url": "https://x402-mcp-starter.kadopi.workers.dev/mcp"
    }
  }
}

README

This repository has no README.

Tools

2

validate_x402_config

Validate x402 payment configuration

Free: checks Base USDC, price, amount, recipient, and facilitator settings before you deploy an x402-paid MCP tool.

ParametersassetrequiredpayTorequiredamountrequirednetworkrequiredpriceUsdrequiredfacilitatorUrlrequired

get_paid_sample

Get a paid sample result

Fixed-price reference path: confirms that an x402-aware MCP client can pay and receive a receipt.

Parametersoptionrequired

Version history

1
  1. v0.2.0LatestSep 16, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts