{"type":"firestarter.listing","listing":{"id":"lst_HjMrCiT1","product_name":"Nahvalur Original Summer Fountain Pen","category":"Fountain Pen","description":"The Original: Summer follows in the footsteps of the provenly popular Original: Spring. Made out of a clear acrylic, the only colored parts of the pen are the: clip, ring, piston and nib. These components have been plated in a bright coppery orange. As always, the Original: Summer uses our in house stainless steel nibs and this demonstrator has a full view of the piston filling system.Nahvalur Original Plus Summer Fountain Pen Specifications:\n\nPen Material: Clear Acrylic\n\n\nTrim: Orange\n\n\nNib: Stainless steel #6 size made by Nahvalur\n\n\nFilling System: Piston-Filling (bottled ink fill only)\n\n\nPen length, closed: 5.75 in. / 146mm\n\n\nPen length, open (cap off): 5.11 in. / 130mm\n\n\nPen length, open (cap posted): 6.97 in. / 177mm\n\n\nPen Diameter, barrel: 0.51 in. / 13 mm\n\n\nPen diameter, grip section: 0.37 in. - 0.43 in. / 9.5mm - 11mm\n\n\nPen weight (without ink): 1.2 oz. / 34g\n\n","images":["https://cdn.shopify.com/s/files/1/0575/7177/files/OriginalSummer3.jpg?v=1726046080","https://cdn.shopify.com/s/files/1/0575/7177/files/OriginalSummer5.jpg?v=1726045940","https://cdn.shopify.com/s/files/1/0575/7177/files/OriginalSummer2.jpg?v=1726046043","https://cdn.shopify.com/s/files/1/0575/7177/files/OriginalSummer4.jpg?v=1726046115","https://cdn.shopify.com/s/files/1/0575/7177/files/OriginalSummer1.jpg?v=1726046141"],"price":65,"currency":"USD","in_stock":true,"inventory_qty":29997,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:00.304Z"},"share_url":"https://firestarter.network/l/lst_HjMrCiT1","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_HjMrCiT1' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Nahvalur Original Summer 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."]}}