{"type":"firestarter.listing","listing":{"id":"lst_lIvBVTF2","product_name":"BC Strength - Spring Collars (set of 2)","category":"Rack Attachments","description":"\n2 in (50 mm) Olympic fit: Keep plates secure to train glutes, legs, back, and chest, and ensure bar stability.\n\nHeavy-duty spring steel: Withstand repeated training and provide lasting clamp tension set after set.\n\nRubber coated handles: Set up and remove fast between sets to move from hip thrusts to squats during training.\n\nSet of 2 collars: Ensure both sleeves are secured to support bench press, deadlifts, and hip thrusts safely.\n\nBC Strength compatibility: Ensure fit on all current BC Strength bars; not for Thruster Bar Lite before 27 Jun 2020.","images":["https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SpringCollars-04.png?v=1780586379","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SpringCollars-09.png?v=1780586379","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SpringCollars-06.png?v=1780586379","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SpringCollars-07.png?v=1780586379","https://cdn.shopify.com/s/files/1/0508/3670/1334/files/SpringCollars-08.png?v=1780586379"],"price":16,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:57:04.637Z"},"share_url":"https://firestarter.network/l/lst_lIvBVTF2","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_lIvBVTF2' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy BC Strength - Spring Collars (set of 2)' and a budget_max comfortably above $16.00 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."]}}