{"type":"firestarter.listing","listing":{"id":"lst__sKKQMC9","product_name":"Flint","category":"Ink Bottle","description":"Our Flint fountain pen ink was formerly titled \"Gunpowder\", but has been renamed to avoid misclassification flags on search engines and social media. \nFlint is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 90mL volume will provide approximately 112 standard converter refills assuming a 0.8mL draw. ","images":["https://cdn.shopify.com/s/files/1/1237/1088/files/Flint_Macro.jpg?v=1781193200","https://cdn.shopify.com/s/files/1/1237/1088/files/Flint.jpg?v=1781193187","https://cdn.shopify.com/s/files/1/1237/1088/products/ink-bottle-box.jpg?v=1774542380"],"price":25,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:18.790Z"},"share_url":"https://firestarter.network/l/lst__sKKQMC9","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__sKKQMC9' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Flint' and a budget_max comfortably above $25.00 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."]}}