{"type":"firestarter.listing","listing":{"id":"lst_HS_vabal","product_name":"Diadem SG Ultra Reel","category":"Tennis String","description":"Diadem SG Ultra Reel\nDiadem SG Ultra is a signature Synthetic Gut designed to have incredible feel and durability at low cost. Utilizing a unique construction, the minimizes fraying, the soft nylon allows for beginners and intermediate level players to take big swings without the risk of losing control. A great entry level string in the full and hybrid setups. \nSG Ultra is often used in hybrids with polys such as Flash or Pro X or with nylons such as Impulse and Evolution for remarkable touch. Due to the low stiffness rating it can be used at normal tension.\n\n\n\nLength: 660 ft / 200m\n\nColors: Black, Natural \n\nGauges Available:\n\n17 (1.25mm)\n16 (1.30mm)\n\n\n","images":["https://cdn.shopify.com/s/files/1/0253/6210/4402/products/SGBlackReel.jpg?v=1762444779","https://cdn.shopify.com/s/files/1/0253/6210/4402/files/SG_natural_Reel.jpg?v=1747938824"],"price":89.95,"currency":"USD","in_stock":true,"inventory_qty":39996,"dynamic_pricing":false,"listed_at":"2026-06-20T14:55:57.815Z"},"share_url":"https://firestarter.network/l/lst_HS_vabal","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_HS_vabal' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Diadem SG Ultra Reel' and a budget_max comfortably above $89.95 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."]}}