{"type":"firestarter.listing","listing":{"id":"lst_wL5gBWDX","product_name":"Haimu Heartbeat Silent Linear Switches","category":"Switches","description":"Overview\nThe Haimu Heartbeat is one of the smoothest silent linears available right now — buttery out of the box, no lube required. Perfect for office builds or anyone who wants a quiet, satisfying typing experience without sacrificing feel.\nSpecifications\n\nSwitch Type – Linear\nBottom-out Force – 55g\nSpring Type – Single-stage, 15g\nTop Housing Material – NYLON\n\nBottom Housing Material – NYLON\n\nStem Material – POM\n\nTravel – 3.8mm\nFactory Lube – Lubed\n\nManufactured by HAIMU\nImage courtesy of deskhero\n","images":["https://cdn.shopify.com/s/files/1/0277/8021/8940/files/haimu_silent_hearbeat_switch_1.jpg?v=1752123886"],"price":10.5,"currency":"USD","in_stock":true,"inventory_qty":39996,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:54.723Z"},"share_url":"https://firestarter.network/l/lst_wL5gBWDX","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_wL5gBWDX' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Haimu Heartbeat Silent Linear Switches' and a budget_max comfortably above $10.50 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."]}}