{"name":"check-payment-recipient","description":"Pre-signing payment safety check for AI agents. Paid MCP tool over x402 (spec v1.2). Free: ping, list_capabilities, get_receipt.","mcp_endpoint":"/mcp","price":"$0.05","network":"eip155:8453","discovery":{"x402":"/.well-known/x402","agent_card":"/.well-known/agent-card.json","openapi":"/openapi.json","llms":"/llms.txt"}}