{"type":"firestarter.listing","listing":{"id":"lst_BVL0v_4V","product_name":"Rotten Straw","category":"Ink Bottle","description":"Rotten Straw is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 50mL volume will provide approximately 62 standard converter refills assuming a 0.8mL draw. \nEnjoy Rotten Straw as a standalone fountain pen ink, or blend it with other Birmingham Pen Co. fountain pen inks to craft your personalized shade. ","images":["https://cdn.shopify.com/s/files/1/1237/1088/files/Rotten_Straw_808707d9-ea9d-48b3-8a51-b8fbc8259b6c.jpg?v=1783696332","https://cdn.shopify.com/s/files/1/1237/1088/files/birminghaminkbottlebox_0de0b90f-7db1-4115-8946-27b561550413.jpg?v=1713972742"],"price":17,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:18.413Z"},"share_url":"https://firestarter.network/l/lst_BVL0v_4V","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_BVL0v_4V' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Rotten Straw' and a budget_max comfortably above $17.00 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."]}}