{"type":"firestarter.listing","listing":{"id":"lst_K9UxWpyq","product_name":"Big Stuff Sack","category":"Accessories","description":" \n\nThe Big Stuff Sack is large enough to hold my overnight camping clothes down to freezing temperatures and fits perfectly sideways in my Arc Haul Zip. While it doesn’t have a dry bag closure, I think it would provide protection from bladder or other leaks inside the pack.\n– Doug L., ★★★★★\nThis big sack will fit multiple clothing items, larger tents, bigger sleeping bags, or other soft bulky items. This stuff sack is spacious but still lightweight thanks to the Dyneema® Composite Fabric construction. It will fit well horizontally in larger backpacks.\nNeed a different size?  Check out the rest of our Stuff Sack collection.","images":["https://cdn.shopify.com/s/files/1/0004/4652/9572/products/zpacks-big-stuff-sack.jpg?v=1632922020","https://cdn.shopify.com/s/files/1/0004/4652/9572/products/stuff-sack-big-olive-l.jpg?v=1632922020","https://cdn.shopify.com/s/files/1/0004/4652/9572/products/stuff-sack-big-spruce-l.jpg?v=1632922020"],"price":29.95,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:39.384Z"},"share_url":"https://firestarter.network/l/lst_K9UxWpyq","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_K9UxWpyq' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Big Stuff Sack' and a budget_max comfortably above $29.95 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."]}}