{"type":"firestarter.listing","listing":{"id":"lst_39_FZOIc","product_name":"Winsor & Newton Permanent White Gouache","category":null,"description":"\nIntroduced in 1935, Winsor &amp; Newton Designers' Gouache is considered by many to be the finest artist-quality gouache available. This Permanent White gouache is a smooth, flat white, and very opaque. Cadmium free and offers full matte coverage.\nAvailable in 2 sizes: 14ml and 37ml","images":["https://cdn.shopify.com/s/files/1/0631/2017/9426/products/Winsor_NewtonPermanentWhiteGouache.jpg?v=1654298793"],"price":12,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:22.696Z"},"share_url":"https://firestarter.network/l/lst_39_FZOIc","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_39_FZOIc' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Winsor & Newton Permanent White Gouache' and a budget_max comfortably above $12.00 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."]}}