{"type":"firestarter.listing","listing":{"id":"lst_x3mmZrlc","product_name":"Model 20 Marietta FP - Tiger Red","category":"Fountain Pen - Model 20","description":"\n\n♦ Presenting the Model 20 Marietta - a slip cap fountain pen that harkens back to the aesthetic of classic fountain pens of yesteryear. ♦ Precision machining and design create a cap that securely and firmly fits to the the section and barrel with a firm grip. When capped or posted properly it is impossible to sling the cap off, so can be securely used in a shirt pocket or pen pouch. ♦ No exterior threads and no shoulder from grip section to barrel. ♦ The pressure is distributed inside the cap and away from the lip to prevent lip cracking. ♦ The cap interior has a feature that releases air pressure to eliminate the vacuum that causes ink spurts on the nib when uncapping. ♦ Filled 3 ways, via disposable cartridge, piston converter, or the eye dropper method. ♦ #6 Size nib - with many tip options in factory or custom ground. ♦ Lifetime warranty,  converter, sample cartridges, and a 30 day money back guarantee are all included. Made in USA. ♦ Shipped with a Franklin-Christoph single pen zippered pouch with an outer white thin box.  \n\n \n♦ Dimensions:  5.0\" from nib tip to barrel end = 127mm5.45\" capped length = 138.43mm2.175\" cap = 55.25mm.575\" cap diameter = 14.61mm.51\" barrel diameter = 12.95mm.41\" smallest diameter of grip section = 10.41mm ♦ Weight with converter inserted but not ink is: .68oz or 19.28 grams. \n\n♦\n\n\n\n♦\n\n\n\n♦\n\n\n\n♦\n\n\n\n\n\n\n\n","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20TIgerRedFountainPenWEB1.jpg?v=1743519691","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20TigerRedRavennib.jpg?v=1743519698","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20TigerRednoclip.jpg?v=1743519701"],"price":155,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.989Z"},"share_url":"https://firestarter.network/l/lst_x3mmZrlc","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_x3mmZrlc' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 20 Marietta FP - Tiger Red' and a budget_max comfortably above $155.00 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."]}}