{"type":"firestarter.listing","listing":{"id":"lst_eQHnZURZ","product_name":"Model 20 Fountain Pen - Scottish Heather","category":"Fountain Pen - Model 20","description":"\n\nSELLING CONDITION: NEW OLD STOCK. ♦ 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 interior of the cap 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. \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 19.28grams. \n\n\n\n\n♦ Lifetime warranty. Take a standard converter (one included). Made in USA. \n\n\n\n\n","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20ScottishHeatherpair.jpg?v=1779113086","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20ScottishHeatherFPposted.jpg?v=1779113087","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20ScottishHeatherFPcapped.jpg?v=1779113086"],"price":136.75,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:19.950Z"},"share_url":"https://firestarter.network/l/lst_eQHnZURZ","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_eQHnZURZ' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 20 Fountain Pen - Scottish Heather' and a budget_max comfortably above $136.75 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."]}}