{"name":"x402 MCP Starter","description":"Free, self-hosted Cloudflare Workers starter for adding USDC usage billing to a read-only MCP tool. The public endpoint is a Base Sepolia verification environment, not a hosted production payment service.","version":"0.2.0","serviceType":"mcp-service-card","mcpEndpoint":"https://x402-mcp-starter.kadopi.workers.dev/mcp","links":{"productPage":"https://aegis-sales-bot.kadopi.workers.dev/products/x402-mcp-starter","githubReadme":"https://github.com/kadopi/x402-mcp-starter/blob/master/README.md","mcpRegistry":"https://registry.modelcontextprotocol.io/?q=io.github.kadopi%2Fx402-mcp-starter","clawHubSkillSource":"https://github.com/kadopi/x402-mcp-starter/blob/master/openclaw/SKILL.md"},"transport":"streamable-http","skills":[{"id":"x402-mcp-payment-preflight","name":"x402 MCP payment configuration preflight","tags":["x402","mcp","usdc","base-sepolia","cloudflare-workers","payment-preflight","self-hosted"],"examples":["I am building a Cloudflare Workers MCP and want to validate a Base USDC x402 payment configuration before deploying a paid read-only tool.","Show me the minimum MCP flow for an x402-aware client to receive a payment challenge, pay once, and receive a receipt."],"firstTool":"validate_x402_config"}],"limitations":["Self-hosted starter code; not a managed payment service or customer wallet.","The public endpoint uses Base Sepolia and test USDC by default.","The Worker never receives a buyer private key; production Mainnet rollout requires the operator's separate configuration and approval."],"a2a":{"supported":false,"note":"This card describes an MCP service. A2A conversation is provided by Aegis Sales Bot, not x402 MCP Starter."}}