{"type":"firestarter.listing","listing":{"id":"lst_R4CzFQ9O","product_name":"Model 55 Pentium Fountain Pen - Emerald Lime","category":"Fountain Pen - Model 55","description":"\nStaff note: This is a classic color of Emerald acrylic mixed with a hot Lime acrylic for a nice contrast of greens. \n♦ The Model 55 Pentium fountain pen features a #5 nib in an efficiently designed silhouette. Distinctly Franklin-Christoph, with beveled ends, the signature clip and softened simple features. Light weight and balanced when posting, the 55 is a good choice for long writing sessions....\n♦ Triple filling options - cartridge / converter / eye dropper. Cartridges and converter are included. Barrel holds approximately 3.1ml of ink when eyedroppered.\n♦ Made in USA.\n♦ Lifetime warranty.\n♦ Included is a zippered pouch. \n♦ Dimensions:\n.562\" cap diameter.500 upper barrel diameter.438 lower barrel diameter5.25\" capped length6.13\" cap posted length (including nib)4.88\" barrel length (including nib).383\" curved grip section at thinnest point\nWeight: .66oz (18.62grams)","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/55EmeraldLimeFountainPen.jpg?v=1726169931","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/55EmeraldLimeFPcapped.jpg?v=1726169933"],"price":130,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.348Z"},"share_url":"https://firestarter.network/l/lst_R4CzFQ9O","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_R4CzFQ9O' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 55 Pentium Fountain Pen - Emerald Lime' and a budget_max comfortably above $130.00 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."]}}