{"type":"firestarter.listing","listing":{"id":"lst_GGoVJ_sl","product_name":"Model 45 Cor - Black Cathedral Fountain Pen","category":"Fountain Pen - Model 45","description":" ♦ This is the new Model 45 starting in 2025. It features the much from the original design, with a little added length, finials on each end, and 4 grooves in the barrel. \n$125 market price for the pen. Nibs start at $20. \n ♦ Still a pocket pen but long enough to fit a standard converter (included)♦ Classic lines w/ no clip♦ Cartridge, converter, or eye dropper filled. ♦ Precision posting for firm grip on the cap while posted.♦ No. 5 size nib♦ Dimensions: cap diameter     = .550 in  / 13.97 mmbarrel diameter  = .510 in  / 12.954 mmcap length         = 1.94 in  / 49.276 mmbarrel length      = 3.15 in / 80.01 mmbarrel end to nib tip length = 4.75 in / 120 mmfull length including nib posted = 6 in / 152 mmgrip section at thinnest point (curved) = .383 in / 9.73 mmlength of exposed area of grip section = .875 in / 22.22 mm*weight without ink = .53oz / 15.14g♦ Lifetime warranty♦ Made in USA in our NC facility♦ Shipped with the bonus of a Franklin-Christoph single pen zippered pouch with an outer white thin box with papers included. ","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/45BlackCathedralFPweb_b33db6b9-335c-4477-ac8b-e74d40c47304.jpg?v=1748534038","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/45BlackCathedralmacrogroup.jpg?v=1748534038","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/45BlackCathedralpostedstand.jpg?v=1748534038","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/45BlackCathedralcapped.jpg?v=1748534038","https://cdn.shopify.com/s/files/1/0023/7679/4187/files/FPorderinclusions_ea01d35b-38f7-4a51-a55d-cbaca3f85a02.jpg?v=1755801300"],"price":125,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.212Z"},"share_url":"https://firestarter.network/l/lst_GGoVJ_sl","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_GGoVJ_sl' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 45 Cor - Black Cathedral Fountain Pen' 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."]}}