{"type":"firestarter.listing","listing":{"id":"lst_l0S9TiD8","product_name":"XMARK - Power Rack Stabilizer Foot Extensions","category":"Power Rack","description":"\n\nStability for outside-the-rack work: Support spotter-arm sessions and ensure secure reps as you train beyond the rack.\n\n3 in × 3 in heavy-duty build: Match Viper Power Racks to withstand forces and keep your rack stable during demanding sets.\n\n24 in length: Provide a longer footprint to improve front-to-back stability when training with spotter arms and attachments.\n\nSold in pairs: Set up both sides to expand your outside-the-rack training area and keep your power rack supported.\n\nNot compatible with XMARK Squat Rack: Ensure proper fit with Viper Power Racks and keep your setup safe and consistent.\n","images":["https://cdn.shopify.com/s/files/1/0508/3670/1334/files/RA-5108.jpg?v=1780592055"],"price":179,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:57.282Z"},"share_url":"https://firestarter.network/l/lst_l0S9TiD8","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_l0S9TiD8' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy XMARK - Power Rack Stabilizer Foot Extensions' and a budget_max comfortably above $179.00 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."]}}