{"type":"firestarter.listing","listing":{"id":"lst_WfmgdLBG","product_name":"Kuretake No. 22 Brush Pen","category":null,"description":"\nThis brush pen features a soft nylon brush tip that can produce a wide range of thick and thin lines, ideal for illustration, sumi-e drawing, manga, calligraphy, and lettering. Its versatile medium tip is perfect for creating both fine and bold details. The pen's smooth-flowing, water-based pigment ink is water-resistant and lightfast.\nAvailable in 4 variations: white, black, metallic silver, and metallic gold.","images":["https://cdn.shopify.com/s/files/1/0631/2017/9426/products/KuretakeNo.22BrushPen.jpg?v=1654294671","https://cdn.shopify.com/s/files/1/0631/2017/9426/products/KuretakeNo.22BrushPen2.jpg?v=1654294675"],"price":9,"currency":"USD","in_stock":true,"inventory_qty":39996,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:22.760Z"},"share_url":"https://firestarter.network/l/lst_WfmgdLBG","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_WfmgdLBG' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Kuretake No. 22 Brush Pen' and a budget_max comfortably above $9.00 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."]}}