{"type":"firestarter.listing","listing":{"id":"lst_3yTOWZ7g","product_name":"Medium-Plus Dry Bag","category":"Accessories","description":"\n\nPerfect size for my 40-degree sleeping bag and the clothes I sleep in. Fits perfectly into the Arc Blast sideways. I love how all of the Zpack bags keep my Arc Blast organized and tight to my back, and I never have to worry about anything getting wet!!\n– Lon W., ★★★★★\nKeep your gear dry and dust-free without adding any more weight than you have to. This size will fit multiple clothing items or an average-sized ultralight sleeping bag. It fits well horizontally in most backpacks.\nNeed a different size?  Check out the rest of our Dry Bag collection.","images":["https://cdn.shopify.com/s/files/1/0004/4652/9572/products/zpacks-medium-plus-dry-bag.jpg?v=1536850005","https://cdn.shopify.com/s/files/1/0004/4652/9572/files/zpacks-medium-plus-dry-bag.jpg?v=1729875292"],"price":37.95,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:39.405Z"},"share_url":"https://firestarter.network/l/lst_3yTOWZ7g","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_3yTOWZ7g' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Medium-Plus Dry Bag' and a budget_max comfortably above $37.95 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."]}}