{"type":"firestarter.listing","listing":{"id":"lst_QmMzG-Zm","product_name":"Extra Kaibab Headset Spacer","category":null,"description":"Want to mount your Kaibab Cradle on two bikes, with easy swapping between them? Get an extra headset spacer and install one on each bike. Once both spacers are installed, you can take the cradle on and off with just four bolts and no headset adjustments.","images":["https://cdn.shopify.com/s/files/1/0610/6529/8090/files/kaibab-headset-spacer-3.jpg?v=1777825360"],"price":30,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:43.045Z"},"share_url":"https://firestarter.network/l/lst_QmMzG-Zm","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_QmMzG-Zm' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Extra Kaibab Headset Spacer' and a budget_max comfortably above $30.00 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."]}}