{"type":"firestarter.listing","listing":{"id":"lst_7Ko2CewP","product_name":"Custom XS Phosphor Bronze Guitar String Sets","category":null,"description":"Unlock superior durability and tone with D'Addario XS Phosphor Bronze Acoustic Guitar Strings. Featuring a unique, ultra-thin coating, these strings offer unmatched protection against wear while delivering a rich, warm sound with brilliant clarity. The XS Phosphor Bronze set provides exceptional playability and longer-lasting performance. Build your XS Phosphor Bronze String Set now!","images":["https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMXSPB12_Main_transparent_web.png?v=1773014083","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMXSPB6_Main_transparent_web.png?v=1773014084","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMXSPB7_Main_transparent_web.png?v=1773014084","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMXSPB8_Main_transparent_web.png?v=1773014085"],"price":23.3,"currency":"USD","in_stock":true,"inventory_qty":39996,"dynamic_pricing":false,"listed_at":"2026-06-20T14:55:57.313Z"},"share_url":"https://firestarter.network/l/lst_7Ko2CewP","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_7Ko2CewP' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Custom XS Phosphor Bronze Guitar String Sets' and a budget_max comfortably above $23.30 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."]}}