{"type":"firestarter.listing","listing":{"id":"lst_8MhhNRzQ","product_name":"Model 50 Grandis Fountain Pen -Solid Emerald","category":"Fountain Pen - Model 50","description":"\n\nThis is the our Emerald acrylic, a dark green material that gets lighter in the spots where the material is thinner. A traditional F-C production color. ♦ The long barrel is designed for writing balance as the cap does not post. The end of the barrel features inverted bevels to create a thinner band at the end.\n\n\n\n\n\nDimensions:.710\" to .562\" cap diameter  (18.03mm to 14.27mm).560\" upper barrel diameter (14.22mm).468\" lower barrel diameter (11.89mm)6.560\" capped length (167mm)6.060\" barrel length including nib (154mm).41\" grip section at thinnest point (10.41mm)Weight without ink cap included = 1.042oz / 20.70gWeight of barrel, nib, section and converter without ink = .711oz / 20.14g\n♦ Made in USA of long lasting, durable hard acrylic that is light weight. ♦ Standard Int'l Cartridge / Converter filled, one of each included. Also can be used as an eyedropper. Barrel holds approximately 3.5ml of ink when eyedroppered.\n♦ #6 Size nib - with many tip options in factory or custom ground.♦ Lifetime Warranty. ♦ Ships a Franklin-Christoph one pen XL zippered pouch with outer white box.\n","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/products/50EmeraldFP.jpg?v=1648235665","https://cdn.shopify.com/s/files/1/0023/7679/4187/products/50Emeraldside.jpg?v=1648235669"],"price":185,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.541Z"},"share_url":"https://firestarter.network/l/lst_8MhhNRzQ","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_8MhhNRzQ' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 50 Grandis Fountain Pen -Solid Emerald' and a budget_max comfortably above $185.00 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."]}}