{"type":"firestarter.listing","listing":{"id":"lst_Z6MruDjP","product_name":"Leonardo Momento Zero Grande 2.0 Fountain Pen – Crepuscolo Marino – GT #8 14K Gold","category":"Fountain Pen","description":"Description\nCrepuscolo Marino (Twilight on the Sea) captures the enchanting transition between day and night, where the sun lingers below the horizon, casting warm ochre and orange tones that blend with the cool blues of the sea and sky. This pen embodies the beauty of that fleeting moment — a visual and emotional reflection of calm, light, and movement.\n\nTechnical Details\n\n  \nNib: Gold La Fenice #8\n  \nFilling System: Integrated piston mechanism, 1.5 ml capacity\n  \nInk Window: Transparent window to monitor ink level\n  \nFeed: Japanese black ebonite\n  \nIncluded: Ink bottle\n  \nService Tool: Piston mechanism can be disassembled using the Leonardo wrench (sold separately)\n\n","images":["https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Momento-Zero-Grande-2_0-Fountain-Pen-Crepuscolo-Marino-GT-8-14K-Gold_0cfdce2a.jpg?v=1762525553","https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Momento-Zero-Grande-2_0-Fountain-Pen-Crepuscolo-Marino-GT-8-14K-Gold-2_925b4369.jpg?v=1762525565","https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Momento-Zero-Grande-2_0-Fountain-Pen-Crepuscolo-Marino-GT-8-14K-Gold-3_04d8084f.jpg?v=1762525577","https://cdn.shopify.com/s/files/1/0575/7177/files/Leonardo-Momento-Zero-Grande-2_0-Fountain-Pen-Crepuscolo-Marino-GT-8-14K-Gold-4.jpg?v=1762525578"],"price":745,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:59.504Z"},"share_url":"https://firestarter.network/l/lst_Z6MruDjP","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_Z6MruDjP' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Leonardo Momento Zero Grande 2.0 Fountain Pen – Crepuscolo Marino – GT #8 14K Gold' and a budget_max comfortably above $745.00 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."]}}