{"type":"firestarter.listing","listing":{"id":"lst_KY3LHk18","product_name":"1.50ct Marquise Lab Grown Diamond (Colour D, Clarity VS2, IGI Certified)","category":"diamond","description":"\n    Type: Lab Grown Diamond\nShape: Marquise\nCarat: 1.50\nColour: D\nClarity: VS2\nPolish: Excellent\nSymmetry: Excellent\nFluorescence: None\nMeasurements: 11.92x5.94x3.52mm\nL/W Ratio: 2.01\nTable: 64%\nDepth: 59.3%\nCertificate: IGI\nCertificate Number: LG791646122\nCertificate PDF: View\n\n  ","images":["https://cdn.shopify.com/s/files/1/1994/1391/files/1.50ct_Marquise_Lab_Grown_Diamond_Colour_D_Clarity_VS2_IGI_Certified.webp?v=1779154693"],"price":1045,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:30.227Z"},"share_url":"https://firestarter.network/l/lst_KY3LHk18","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_KY3LHk18' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy 1.50ct Marquise Lab Grown Diamond (Colour D, Clarity VS2, IGI Certified)' and a budget_max comfortably above $1045.00 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."]}}