{"type":"firestarter.listing","listing":{"id":"lst_F9jHaef1","product_name":"Piper Premium Ink 888 Rollerball Refill","category":"Refills","description":"This is the most common rollerball refill shape in the world, and is often called the \"international standard\" refill. They fit many many brands including all Franklin-Christoph and Piper standard rollerballs. [4.39\" long]The medium point puts down a medium to thick line with fluid ink, variable with different paper styles. \n","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/Piper888Group.jpg?v=1707772663","https://cdn.shopify.com/s/files/1/0023/7679/4187/products/888_Blue_Refill.jpg?v=1707772663","https://cdn.shopify.com/s/files/1/0023/7679/4187/products/888_Black_Refill.jpg?v=1707772663","https://cdn.shopify.com/s/files/1/0023/7679/4187/products/888_Orange_Refill.jpg?v=1707772663","https://cdn.shopify.com/s/files/1/0023/7679/4187/products/888_Magenta_Refill.jpg?v=1707772663","https://cdn.shopify.com/s/files/1/0023/7679/4187/products/888_Pink_Refill.jpg?v=1707772663"],"price":1.95,"currency":"USD","in_stock":true,"inventory_qty":99990,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.936Z"},"share_url":"https://firestarter.network/l/lst_F9jHaef1","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_F9jHaef1' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Piper Premium Ink 888 Rollerball Refill' and a budget_max comfortably above $1.95 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."]}}