{"type":"firestarter.listing","listing":{"id":"lst_7WYiL84d","product_name":"Triangle - Hardcover Book by Mac Barnett & Jon Klassen","category":"Curated","description":"Multi-award-winning, New York Times best-selling duo Mac Barnett and Jon Klassen conspire again on a slyly funny tale about some very sneaky shapes.Meet Triangle. He is going to play a sneaky trick on his friend, Square. Or so Triangle thinks. . . . With this first tale in a new trilogy, partners in crime Mac Barnett and Jon Klassen will have readers wondering just who they can trust in a richly imagined world of shapes. Visually stunning and full of wry humor, here is a perfectly paced treat that could come only from the minds of two of today’s most irreverent — and talented — picture book creators.\nBoard Book 9\" x 9\"","images":["https://cdn.shopify.com/s/files/1/1751/9263/files/71wMcleChWL._SL1500.jpg?v=1773345318","https://cdn.shopify.com/s/files/1/1751/9263/products/911yF9rkOSL.jpg?v=1773345318","https://cdn.shopify.com/s/files/1/1751/9263/files/61k1dvT3g8L._SL1200.jpg?v=1773345318"],"price":16.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:43:45.850Z"},"share_url":"https://firestarter.network/l/lst_7WYiL84d","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 ","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_7WYiL84d' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Triangle - Hardcover Book by Mac Barnett & Jon Klassen' and a budget_max comfortably above $16.99 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."]}}