{"type":"firestarter.listing","listing":{"id":"lst_Mer-UpRY","product_name":"Gold Vein Twinkle","category":"Ink Bottle","description":"SAVE on Gold Vein Twinkle in the Twinkle Pair.\nEmerging from a dark host matrix, Gold Vein Twinkle reveals a nearly black-umber base threaded with a golden sparkle, evoking gold precipitated along fractures in metamorphic rock.\nTwinkle Formula inks require additional pen maintenance and cleaning compared to their traditional ink peers. A medium point grade nib or larger is suggested to permit the pigment to travel from reservoir to page. We do not recommend pigmented inks in vintage pens. With all pigmented inks, we suggest using a pen that fully disassembles for complete and thorough cleaning.\nEach 90mL volume will provide over 110 standard converter refills with an average 0.8mL draw. Rigid glass bottles arrive individually wrapped in cellulose wadding and prepared in a beautifully foiled gift box. We manufacture this ink in Pennsylvania with domestic and imported ingredients.","images":["https://cdn.shopify.com/s/files/1/1237/1088/files/Gold_Vein_Twinkle_Macro_Swatch.jpg?v=1769018789","https://cdn.shopify.com/s/files/1/1237/1088/files/Gold_Vein_Macro_Writing_Sample.jpg?v=1769018789","https://cdn.shopify.com/s/files/1/1237/1088/files/Gold_Vein_Twinkle_85ff53f8-0720-441a-8043-e648dc8ce858.jpg?v=1780417207","https://cdn.shopify.com/s/files/1/1237/1088/files/Gold_Vein_Writing_Sample.jpg?v=1769018789","https://cdn.shopify.com/s/files/1/1237/1088/files/Ink_Bottle_Box.jpg?v=1774542507"],"price":39,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:18.188Z"},"share_url":"https://firestarter.network/l/lst_Mer-UpRY","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_Mer-UpRY' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Gold Vein Twinkle' and a budget_max comfortably above $39.00 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."]}}