{"type":"firestarter.listing","listing":{"id":"lst_KtizsyX4","product_name":"Leonardo Replacement Steel Nibs  - #6","category":"Nib","description":"Here you can select and buy your steel nibs, trim*: Silver, Rose gold and Yellow gold.\nNib size available: EF, F, M, B, Stub1.1The nib is assembled on the ABS feed and housing.\n*The plating of these nibs is of high quality, anti-allergic, extra resistant with any type of ink, even iron galls.","images":["https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Replacement-Steel-Nibs-6.jpg?v=1730045744","https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Replacement-Steel-Nibs-6-2.jpg?v=1730045773","https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Replacement-Steel-Nibs-6-3_11de2632-da3c-40e4-8277-0740fae9019a.jpg?v=1737214787"],"price":38,"currency":"USD","in_stock":true,"inventory_qty":169983,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:00.144Z"},"share_url":"https://firestarter.network/l/lst_KtizsyX4","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_KtizsyX4' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Leonardo Replacement Steel Nibs  - #6' and a budget_max comfortably above $38.00 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."]}}