{"type":"firestarter.listing","listing":{"id":"lst_szF4bmYe","product_name":"PowerBlock - Pro Series Kettlebell Handle (Converts Pro Dumbbells)","category":"Kettlebell Attachments","description":"\n\nPro Series compatibility: Set up on PowerBlock Pro dumbbells to train swings, goblet squats, and carries for legs and core.\n\nSelector pin changes: Move between weights fast to target shoulders, back, and core across presses, cleans, and snatches.\n\nKettlebell-style center of mass: Improve control to perform swings that strengthen hips, glutes, and lower back.\n\nCompact footprint: Store beside your dumbbells to expand kettlebell training in home gyms with limited floor space.\n\nWorks with existing Pro plates: Expand kettlebell work and keep storage minimal by converting your current Pro dumbbell stack.\n","images":["https://cdn.shopify.com/s/files/1/0508/3670/1334/files/KB-Hanlde-Left-Face-Web.jpg?v=1780589669"],"price":149,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-07-03T16:00:56.728Z"},"share_url":"https://firestarter.network/l/lst_szF4bmYe","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_szF4bmYe' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy PowerBlock - Pro Series Kettlebell Handle (Converts Pro Dumbbells)' and a budget_max comfortably above $149.00 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."]}}