Subscribe to a Mobula API plan via MPP payment. Creates or updates an agent customer with the selected plan (Startup, Growth, Enterprise) and billing frequency (monthly, yearly). Returns an API key and user_id. If upgrading, pass ?upgrade=true. Before subscribing, check /agent/mpp/subscription to verify no active plan. After subscribing, use the returned API key with header "x-api-key: <key>" (or "Authorization: <key>") to call any Mobula REST endpoint without further MPP payments. You can also connect to WebSocket streams at wss://streams.mobula.io for real-time trade feeds, price updates, and market events using the same API key. Full documentation: https://docs.mobula.io

Subscribe to a Mobula API plan via MPP payment. Creates or updates an agent customer with the selected plan (Startup, Growth, Enterprise) and billing frequency (monthly, yearly). Returns an API key and user_id. If upgrading, pass ?upgrade=true. Before subscribing, check /agent/mpp/subscription to verify no active plan. After subscribing, use the returned API key with header "x-api-key: <key>" (or "Authorization: <key>") to call any Mobula REST endpoint without further MPP payments. You can also connect to WebSocket streams at wss://streams.mobula.io for real-time trade feeds, price updates, and market events using the same API key. Full documentation: https://docs.mobula.io