{"type":"firestarter.listing","listing":{"id":"lst_QRQiDjKs","product_name":"Model 55 Fountain Pen - Midnight Blue & Sage","category":"Fountain Pen - Model 55","description":"\nSELLING CONDITION: NEW OLD STOCK. This color combination hasn't been released before.\n♦ Made with Sage scrylic featuring green tone flakes with hints of grey and midnight blue.\n♦ The Model 55 Pentium 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♦ This look features our midnight blue on 4 parts and sage green on the upper to barrel make up the 5 major parts of this option. Also featuring our rhodium plated clip with 4 engraved diamonds and nib of your choice. \n♦ Triple filling options - cartridge / converter / eye dropper. Cartridges and converter are included.\n♦ Made in USA and ships in a zippered pen 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/55MidnightSageFP.jpg?v=1779290739","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/55MidnightSageFPcapped.jpg?v=1779290745"],"price":106.25,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:19.965Z"},"share_url":"https://firestarter.network/l/lst_QRQiDjKs","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_QRQiDjKs' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 55 Fountain Pen - Midnight Blue & Sage' and a budget_max comfortably above $106.25 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."]}}