{"type":"firestarter.listing","listing":{"id":"lst_EVlYaMkn","product_name":"Practice Grip Instrumental Hand Exerciser","category":"D'Addario","description":"Practice Grip is a pocket-sized hand and finger exerciser ideal for woodwind and brass instrumentalists who use keys or valves. This conditioning tool is designed with light overall tension to foster proper, healthy finger motion, digital independence, and increased finger speed and dexterity. The tension in each individual spring-loaded piston is adjustable, making this device also useful for finger, hand, and forearm strengthening.","images":["https://cdn.shopify.com/s/files/1/0669/6042/5025/files/dw_WW-PG-01_main_transparent.png?v=1773013810","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/dw_WW-PG-01_detail1_transparent_6c3221e0-2e4e-4df1-976a-a10694fe7b7c.png?v=1773013810"],"price":17.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:55:57.885Z"},"share_url":"https://firestarter.network/l/lst_EVlYaMkn","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_EVlYaMkn' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Practice Grip Instrumental Hand Exerciser' and a budget_max comfortably above $17.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}