{"type":"firestarter.listing","listing":{"id":"lst_tqtuVww4","product_name":"Model 03 Modified Fountain Pen - Ruby","category":"Fountain Pen - Model 03M","description":"\n\n\n\n\n\n\n Featuring our Ruby acrylic. It's a light red that shows depth getting lighter in thinner parts of the pen. \n\n\n\n ♦ The Modified 03 features a solid one piece cap. This design we use for our maki-e limited edition pens. So the cap is slightly shorter, with no finial or disk as compared to the regular 03, which means no clip option. \n\n\n♦ Iterum is Latin for \"again\" or \"once more\" as the Model 03 is designed in the spirit of our original Model 01 IPO. Straight sides with very subtle tapers down toward the ends. Mostly flat top and bottom with just a hint of the normal Franklin-Christoph bevel on each end. ♦ Threads on the end of the grip for comfort. This also allows for precision posting so there is no creaking or wobbling when the pen is posted. ♦ Lightweight at .65 oz or 18.4 grams (with nib and converter un-inked)♦ #6 Size nib - with many tip options in factory or custom ground.♦ Cartridge - piston converter - eye dropper filling options. ♦ Made in USA.\n\n\n♦ Dimensions:Smallest point of grip section: .391\" Largest point of grip section: .480\"Barrel center: .512\"Cap center: .575\"Cap length: 2.375\"Nib tip to barrel end: 5.010\" Cap posted full length to nib tip: 6.875\"  ♦ Lifetime warranty♦ 30 day return policy.♦ Shipped in a Franklin-Christoph one pen zippered case with outer white box. Zippered case materials vary.\n","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/03MRubyFountainPen.jpg?v=1727719886","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/03MRubyFPcapped.jpg?v=1727719888","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/03MRubyFPposted.jpg?v=1727719891","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/FPorderinclusions_9e942a3e-e29f-4f73-8f0b-9faa951c3a3d.jpg?v=1727719895"],"price":125,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.347Z"},"share_url":"https://firestarter.network/l/lst_tqtuVww4","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_tqtuVww4' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 03 Modified Fountain Pen - Ruby' and a budget_max comfortably above $125.00 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."]}}