{"type":"firestarter.listing","listing":{"id":"lst_Ua3sW0f7","product_name":"Custom EXL Chromes Guitar String Sets","category":null,"description":"Experience smooth playability and warm, mellow tones with D'Addario Chrome Flat Wound Guitar Strings. Crafted with precision, these strings offer a silky, comfortable feel while delivering rich, balanced sound with minimal finger noise. Ideal for jazz, blues, or any player seeking a smooth, vintage-inspired tone, the Chrome Flatwound set provides excellent durability and a smooth playing experience. Build your Custom String EXL Chromes Set now!","images":["https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMECG6_Main1_transparent_web.png?v=1773014079","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMECG7_Main_transparent_web.png?v=1773014080","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/DS_CUSTOMECG8_Main1_transparent_web.png?v=1773014080"],"price":24,"currency":"USD","in_stock":true,"inventory_qty":29997,"dynamic_pricing":false,"listed_at":"2026-06-20T14:55:57.309Z"},"share_url":"https://firestarter.network/l/lst_Ua3sW0f7","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_Ua3sW0f7' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Custom EXL Chromes Guitar String Sets' and a budget_max comfortably above $24.00 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."]}}