{"type":"firestarter.listing","listing":{"id":"lst_ZXzBJWwk","product_name":"0.74ct Round Natural Diamond (Colour M, Clarity SI2, Cut EX, IGI Certified)","category":"diamond","description":"\n    Type: Natural Diamond\nShape: Round\nCarat: 0.74\nColour: M\nClarity: SI2\nCut: Excellent\nPolish: Excellent\nSymmetry: Excellent\nFluorescence: None\nMeasurements: 5.81x5.84x3.51mm\nL/W Ratio: 0.99\nTable: 63%\nDepth: 60.3%\nCertificate: IGI\nCertificate Number: 649450896\nCertificate PDF: View\n\n  ","images":["https://cdn.shopify.com/s/files/1/1994/1391/files/0.74ct_Round_Natural_Diamond_Colour_M_Clarity_SI2_Cut_EX_IGI_Certified.webp?v=1778505524"],"price":637,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:30.446Z"},"share_url":"https://firestarter.network/l/lst_ZXzBJWwk","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_ZXzBJWwk' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy 0.74ct Round Natural Diamond (Colour M, Clarity SI2, Cut EX, IGI Certified)' and a budget_max comfortably above $637.00 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."]}}