{"type":"firestarter.listing","listing":{"id":"lst_xHt9RWc8","product_name":"Leonardo Momento Zero Fountain Pen - Lava and Ash ST","category":"Fountain Pen","description":"Momento zero Lava Cenere, a pen that evokes the magical energy of the Gulf of Naples, its volcanic origins. Breathtaking landscapes between fire and earth with Vesuvius, the islands, the sea, rich history and legends, the contrast between ancient and modern. All in a pen with the color of lava, like  fiery sunsets and Pompeian painting, and the color of ash, dark like the the rich black or grey of  of the slopes of the active volcano.- - - Filling system converter/cartrigesThe nib:Steel nibs 'la fenice' EF, F, M, B, Stub1.1, Stub1.5Elastic steel nib Extra fine o FineGold nib 'la Fenice' EEF, EF, F, M, B, Stub1.1 Elastic Gold nib Elastic EF and Elastic FClosed pen lenght: 142mmCap lenght: 65mmBarrel lenght: 127mm (nib included)Weight inkless: 27gCap diameter: 15,5mmGrip diameter: 10,6mm ","images":["https://cdn.shopify.com/s/files/1/0575/7177/files/photo-output_7_b8e7e866-2f4c-43ee-9ef5-7ab7abfaf3b2.jpg?v=1777557683","https://cdn.shopify.com/s/files/1/0575/7177/files/Momento-zero-LavaCenere-Lava-and-Ash.jpg?v=1775662475","https://cdn.shopify.com/s/files/1/0575/7177/files/Momento-zero-LavaCenere-Lava-and-Ash-3.jpg?v=1775662478"],"price":179,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:59.014Z"},"share_url":"https://firestarter.network/l/lst_xHt9RWc8","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_xHt9RWc8' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Leonardo Momento Zero Fountain Pen - Lava and Ash ST' and a budget_max comfortably above $179.00 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."]}}