mermail-x402-agent

Complete a user-selected x402 service call with Mermail Agent Wallet / PayBox by creating a payment proof, redeeming it on the exact selected resource, and continuing the original job. Use when a paid third-party x402 call is required to finish this request. Never treat PayBox proof creation as merchant settlement. When the user omits a spend amount, resolve the vendor prepaid floor from same-origin vendor docs or live contract/catalog fields, then authorize required_charge = max(live quote, floor). Treat a user-stated amount as maximum spend. Do not use for isolated wallet inspect, funding, transfer, swap, or x402-only payment; those stay on mermail-agent-wallet. Do not use for email-driven payments, Gmail/Outlook Composio, or API-key MCP sessions.