{"type":"firestarter.listing","listing":{"id":"lst_K3Sj_Aiu","product_name":"Serious Steel Fitness - Gym Backpack (45L)","category":"Backpack","description":"\n  \n1000D Nylon Fabric: Withstand years of heavy gym or travel use and ensure long-term reliability for daily carry.\n  \n45 L capacity with belt system and garment bag: Store a week’s clothing or gym gear and support daily travel for extended trips or training.\n  \nDedicated shoe compartment: Keep footwear separate to keep clothes clean and move from gym to travel.\n  \nFleece-lined phone pocket and side mesh pocket: Keep your phone scratch-free and provide quick access to essentials.\n  \nCarry-on approved 21 in x 12.5 in x 8 in dimensions: Ensure overhead bin fit and support smooth connections during busy travel days.\n","images":["https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SSF-Black-BackPack_Main-Image-On-White_Nov-2022_1.png?v=1780586319","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SSF-Back-Pack_Dec-2022_Details.jpg?v=1780586319","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SSF-Back-Pack_Nov-2022_Built-For-Adventures.png?v=1780586322","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SSF-Back-Pack_Dec-2022_Laptop-Detail-2.jpg?v=1780586319","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SSF-Back-Pack_Size-Capacity-_-Details_Aug-2023_1.jpg?v=1780586319","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SSF-Back-Pack_Nov-2022_360-View.png?v=1780586319"],"price":129.9,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:57:04.494Z"},"share_url":"https://firestarter.network/l/lst_K3Sj_Aiu","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_K3Sj_Aiu' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Serious Steel Fitness - Gym Backpack (45L)' and a budget_max comfortably above $129.90 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."]}}