{"type":"firestarter.listing","listing":{"id":"lst_fb203TDK","product_name":"XMARK - Black DiamondOlympic Weight Plates and Curl Barbell Sets","category":"Barbell + Plate Set","description":"\n\nBLACK DIAMOND curl bar builder: Set up a home gym station to train biceps and triceps and improve curl and extension performance.\n\nMultiple curl bar options: Provide choices to target biceps and triceps during curls and extensions, and support progressive training.\n\nXMARK precision and accuracy: Ensure dependable quality to improve curl control and triceps targeting across repeated sets and sessions.\n\nCollars not included: Keep plates secure during curls and triceps extensions with optional collars to ensure safe, uninterrupted sets.\n\n65 lb set (4) 10 lb, (4) 5 lb, (2) 2.5 lb: Train foundational curls and extensions to build arm strength and control at home sessions.\n\n115 lb set (2) 25 lb, (4) 10 lb, (4) 5 lb, (2) 2.5 lb: Deliver heavier loads to strengthen biceps and triceps for advanced home training.\n","images":["https://cdn.shopify.com/s/files/1/0508/3670/1334/files/CROWBAR-CURL-BD-BAL-65.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/CROWBAR-CURL-BD-BAL-95.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/CROWBAR-CURL-BD-BAL-115_402284c9-44ba-4e0d-b831-75a2e5de3d8d.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/CROWBAR-CURL-BD-BAL-115.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/3675-BLACK-BD-65.jpg?v=1780592093","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/3675-BLACK-BD-95.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/3675-BLACK-BD-115.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/XM-Sets_Black-Diamond-Curl-Barbells.jpg?v=1780592091","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/XM-Sets_Black-Diamond-Curl-Weight.jpg?v=1780592091"],"price":269,"currency":"USD","in_stock":true,"inventory_qty":59994,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:53.145Z"},"share_url":"https://firestarter.network/l/lst_fb203TDK","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_fb203TDK' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy XMARK - Black DiamondOlympic Weight Plates and Curl Barbell Sets' and a budget_max comfortably above $269.00 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."]}}