{"type":"firestarter.listing","listing":{"id":"lst_pUnpVCFm","product_name":"Pick 'n' Mix 6 Watercolour Half Pans","category":"Art Supplies","description":"Choose six of our hand-poured watercolour half pans and we’ll make one of them free.\nThis is your chance to experiment. Try that bold pink you’ve been eyeing, pair earthy neutrals with a pop of brightness, or build a mini palette around a single mood or season. There are no rules here – just colour, curiosity and the freedom to mix your own way.\nEach half pan is artist-grade and pigment-rich, with the highest lightfastness rating across the board. Hand-filled in our Somerset studio and poured into recycled plastic pans made from ghost nets recovered from the Cornish coast, they’re made to perform beautifully and tread a little lighter.","images":["https://cdn.shopify.com/s/files/1/0089/6129/4417/files/ArtPicknMix6_5faabd36-9fb8-409b-80e9-1f11bc18097e.jpg?v=1772461113"],"price":0,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:22.536Z"},"share_url":"https://firestarter.network/l/lst_pUnpVCFm","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_pUnpVCFm' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Pick 'n' Mix 6 Watercolour Half Pans' and a budget_max comfortably above $0.00 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."]}}