{"type":"firestarter.listing","listing":{"id":"lst_8sZH9olI","product_name":"Nahvalur Original Winter Fountain Pen","category":"Fountain Pen","description":"\n\nThe last of the seasonal demonstrators is here!\n This time we’ve captured the essence of the frigid final months of the year with furniture, trim and nib done in an icy blue finish. These striking features have again been married to our trust piston fill system, and in-house nibs, ensuring a smooth and seamless writing experience. The clear barrel of the Original: Winter also entices enthusiasts to find a perfect ink match!\n\n\nNahvalur Original Winter Fountain Pen Specifications:\nFinish: Clear, Transparent Resin\nTrims and Clip: Blue\nNib: No. 6 stainless steel\nFilling System: Piston mechanism (bottled ink fill only)\nPen Length, closed: 5.77 in. / 146.5 mm\nPen Length, open, cap off: 5.24 in. / 133 mm\nPen Length, open, cap posted: 6.92 in. / 176mm\nPen Diameter, barrel: 0.53 in. / 13.5mm\nPen Diameter, section: 0.39 in. - 0.43 in. / 10mm - 11 mm\nPen Total Weight: 0.7oz. / 19.8 g\nGift boxed with user guide, 1-year warranty, and metal piston wrench.\n","images":["https://cdn.shopify.com/s/files/1/0575/7177/files/Nahvalur-Original-Winter-Fountain-Pen_f2a24d69.jpg?v=1767106957","https://cdn.shopify.com/s/files/1/0575/7177/files/Nahvalur-Original-Winter-Fountain-Pen-2_47f88c80.jpg?v=1767107076","https://cdn.shopify.com/s/files/1/0575/7177/files/Nahvalur-Original-Winter-Fountain-Pen-3_4aac1f08.jpg?v=1767107077","https://cdn.shopify.com/s/files/1/0575/7177/files/Nahvalur-Original-Winter-Fountain-Pen-4_b7ae40dc.jpg?v=1767107079","https://cdn.shopify.com/s/files/1/0575/7177/files/Nahvalur-Original-Winter-Fountain-Pen-5_cbfa4a5c.jpg?v=1767107080","https://cdn.shopify.com/s/files/1/0575/7177/files/Nahvalur-Original-Winter-Fountain-Pen-6.jpg?v=1767107007"],"price":65,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:59.201Z"},"share_url":"https://firestarter.network/l/lst_8sZH9olI","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_8sZH9olI' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Nahvalur Original Winter Fountain Pen' and a budget_max comfortably above $65.00 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."]}}