{"type":"firestarter.listing","listing":{"id":"lst_yOjjYZqg","product_name":"Training Mask - 2.0 Elevation Training Mask","category":"Elevation Training Masks","description":"\n\n36 resistance level combinations: Adjustable flux valve system on the Black Out variant lets you fine-tune training intensity through multi-level airflow restriction.\n\nTwo colorways -- Black Out and Turn Flow: Black Out runs the classic flux-valve cap system. Turn Flow swaps in dial-style Turn Flow resistance valves for a streamlined adjustment workflow.\n\nInspiratory and expiratory resistance: Loads both directions of the breathing cycle to condition the diaphragm and respiratory muscles for stronger lung capacity over time.\n\nClinically studied: Validated by a study published in the International Journal of Environmental Research and Public Health on HIIT training with elevation masks.\n\nErgonomic design + adjustable strap: Secure, snug fit for running, weightlifting, cycling, and HIIT workouts -- no slipping during intense sessions.\n\nThree sizes by body weight: S 100-149 lb, M 150-249 lb, L 250+ lb. Backed by a 30-Day No Questions Asked Guarantee.\n","images":["https://cdn.shopify.com/s/files/1/0508/3670/1334/files/2-0-black-resistance-valves-bicycle-protective-fashion-665_640x_crop_center_52a9f501-436b-4243-a71b-892bd492573c.webp?v=1780589603","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/Placeholder2.jpg?v=1780589603","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/Placeholder3.jpg?v=1780589603","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/Placeholder4.jpg?v=1780589603","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/turnflow-490.jpg?v=1780589603"],"price":39.99,"currency":"USD","in_stock":true,"inventory_qty":59994,"dynamic_pricing":false,"listed_at":"2026-07-03T16:00:56.581Z"},"share_url":"https://firestarter.network/l/lst_yOjjYZqg","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_yOjjYZqg' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Training Mask - 2.0 Elevation Training Mask' and a budget_max comfortably above $39.99 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."]}}