This is a routing layer that connects Claude to AgentPMT's marketplace of pay-per-use AI tools. It handles the authentication and payment flow so you can call external AI services without managing API keys or billing yourself. Reach for this when you need capabilities beyond what's built into Claude, like specialized models or tools that charge per request. The router runs locally via stdio and manages secure access to whatever's available in the AgentPMT catalog. Think of it as a payment gateway that lets Claude spend credits on your behalf to access third-party AI tooling.