{"type":"firestarter.listing","listing":{"id":"lst_ZB4QhHzC","product_name":"4.00ct Marquise Lab Grown Diamond (Colour E, Clarity VVS2, IGI Certified)","category":"diamond","description":"\n    Type: Lab Grown Diamond\nShape: Marquise\nCarat: 4.00\nColour: E\nClarity: VVS2\nPolish: Excellent\nSymmetry: Excellent\nFluorescence: None\nMeasurements: 16.61x8.35x5.19mm\nL/W Ratio: 1.99\nTable: 62%\nDepth: 62.2%\nCertificate: IGI\nCertificate Number: LG797653227\nCertificate PDF: View\n\n  ","images":["https://cdn.shopify.com/s/files/1/1994/1391/files/4.00ct_Marquise_Lab_Grown_Diamond_Colour_E_Clarity_VVS2_IGI_Certified.webp?v=1782149160"],"price":3174,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-07-03T11:45:32.961Z"},"share_url":"https://firestarter.network/l/lst_ZB4QhHzC","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_ZB4QhHzC' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy 4.00ct Marquise Lab Grown Diamond (Colour E, Clarity VVS2, IGI Certified)' and a budget_max comfortably above $3174.00 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."]}}