{"type":"firestarter.listing","listing":{"id":"lst_iiNd_c8Y","product_name":"Keychron K4 Ultra 8K Wireless Custom Mechanical Keyboard","category":"Custom Keyboards","description":"Keychron K4 Ultra is a wireless custom mechanical keyboard with a sleek, durable build. It supports 2.4 GHz, Bluetooth, and wired connections. Through the Keychron Launcher web app, users can remap keys and create macro commands on its 96% compact layout. Powered by ZMK firmware, it enables an 8K polling rate in wireless mode while delivering up to 600 hours of battery life. It is also fully compatible with Windows, macOS, and Linux.","images":["https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K4_Ultra_8K_Wireless_Custom_Mechanical_Keyboard-Features.jpg?v=1783306380","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K4_Ultra_8K_Wireless_Custom_Mechanical_Keyboard-Switch.jpg?v=1783306399","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-8K-Polling-Rate.jpg?v=1782699952","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-Battery-2.jpg?v=1782699987","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K4_Ultra_8K_Wireless_Custom_Mechanical_Keyboard-Connection.jpg?v=1783306425","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-Keycaps.jpg?v=1782700031","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-Customization.jpg?v=1782700051","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-Keychron-Apex-Red-Switch.jpg?v=1782700063","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-Keychron-Apex-Brown-Switch.jpg?v=1782700063","https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-K4-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-Keychron-Apex-Banana-Switch.jpg?v=1782700063"],"price":114.99,"currency":"USD","in_stock":true,"inventory_qty":29997,"dynamic_pricing":false,"listed_at":"2026-07-07T10:29:19.808Z"},"share_url":"https://firestarter.network/l/lst_iiNd_c8Y","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_iiNd_c8Y' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Keychron K4 Ultra 8K Wireless Custom Mechanical Keyboard' and a budget_max comfortably above $114.99 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."]}}