{"type":"firestarter.listing","listing":{"id":"lst_Nz7mtXOG","product_name":"Cayin HA-6A EL34/KT88 Vacuum Tubes Headphone Amplifier","category":null,"description":"Cayin HA-6A EL34/KT88 Vacuum Tubes, Headphone Amplifier\n\n\n\tDual operation Mode: Triode &amp; Ultralinear\n\tUser can configure amplifiers for different vacuum tubes\n\tImpedance matched headphone output\n\tProvided THREE headphone outputs, support TWO input formats\n\tPoint-to-point wielding with premium wire\n\tMulti-stage independent power supply, voltage amplification employs independent regulator design, minimum ripple effect of power interference ensures outstanding audio performance, free from any grain and harshness\n\tDimensions: 197x322x360 mm\n\n\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ha-6a-el34kt88-vacuum-tubes-headphone-amplifier-hifigo-537172.jpg?v=1697056526","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ha-6a-el34kt88-vacuum-tubes-headphone-amplifier-hifigo-649394.jpg?v=1697056522","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ha-6a-el34kt88-vacuum-tubes-headphone-amplifier-hifigo-411534.jpg?v=1697056749","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ha-6a-el34kt88-vacuum-tubes-headphone-amplifier-hifigo-900819.jpg?v=1697056605","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ha-6a-el34kt88-vacuum-tubes-headphone-amplifier-hifigo-127405.jpg?v=1697056501"],"price":2799.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:31.513Z"},"share_url":"https://firestarter.network/l/lst_Nz7mtXOG","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_Nz7mtXOG' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Cayin HA-6A EL34/KT88 Vacuum Tubes Headphone Amplifier' and a budget_max comfortably above $2799.99 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."]}}