{"type":"firestarter.listing","listing":{"id":"lst_MNVwPaXp","product_name":"Replacement Round Stay (S) - Vertical - 19\"","category":"Materials : Hardware","description":"These replacement round vertical stays fit our discontinued Arc Blast, Arc Zip, Arc Haul, and Arc Haul Zip Backpacks. If you prefer our original adjustable Arc stay system, these can be retrofitted into any of our new Arc Haul Ultra backpacks. You may need to trim down the length with a hacksaw to get the right fit.","images":["https://cdn.shopify.com/s/files/1/0004/4652/9572/files/Zpacks-Round-Vertical-Stay_0ca56938-795e-45a1-945e-742d6622c0c9.jpg?v=1694796578"],"price":9.95,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:39.271Z"},"share_url":"https://firestarter.network/l/lst_MNVwPaXp","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_MNVwPaXp' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Replacement Round Stay (S) - Vertical - 19\"' and a budget_max comfortably above $9.95 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."]}}