{"type":"firestarter.listing","listing":{"id":"lst_DeS_lCBh","product_name":"DiFluid R2","category":null,"description":"We have partnered with DiFluid to offer their innovative R2 refractometers.\nA refractometer measures the coffee particles in your brew, giving you an objective reading of concentration, strength, and extraction. While cup quality is paramount, the ability to measure extraction is extremely useful for maximizing your brew, and also allows us to more effectively help you troubleshoot from afar.\nWe have tested these units extensively, and have found them to be intuitive and reliable.\n For more information, visit DiFluid's website.\nSEY subscribers are eligible for a significant discount on the DiFluid R2—email us to find out more!","images":["https://cdn.shopify.com/s/files/1/0002/6352/0281/files/DiFluid2.png?v=1692988745"],"price":229,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:17.219Z"},"share_url":"https://firestarter.network/l/lst_DeS_lCBh","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_DeS_lCBh' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy DiFluid R2' and a budget_max comfortably above $229.00 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."]}}