{"type":"firestarter.listing","listing":{"id":"lst_9QxZB6Sk","product_name":"1.40ct Marquise Natural Diamond (Colour K, Clarity VS2, Cut EX, GIA Certified)","category":"diamond","description":"\n    Type: Natural Diamond\nShape: Marquise\nCarat: 1.40\nColour: K\nClarity: VS2\nCut: Excellent\nPolish: Excellent\nSymmetry: Very Good\nFluorescence: None\nMeasurements: 11.45x5.7x3.36mm\nL/W Ratio: 2.01\nTable: 59%\nDepth: 59%\nCertificate: GIA\nCertificate Number: 1559521631\nCertificate PDF: View\n\n  ","images":["https://cdn.shopify.com/s/files/1/1994/1391/files/1.40ct_Marquise_Natural_Diamond_Colour_K_Clarity_VS2_Cut_EX_GIA_Certified.webp?v=1783451805"],"price":5502,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-07-07T23:45:50.236Z"},"share_url":"https://firestarter.network/l/lst_9QxZB6Sk","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_9QxZB6Sk' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy 1.40ct Marquise Natural Diamond (Colour K, Clarity VS2, Cut EX, GIA Certified)' and a budget_max comfortably above $5502.00 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."]}}