{"type":"firestarter.listing","listing":{"id":"lst_3vsKKeuI","product_name":"12-53 Jacob Collier Taylor 5-String, XS Phosphor Bronze Acoustic Guitar Strings","category":"D'Addario","description":"Born from our greatest breakthrough in string innovation, XS Phosphor Bronze strings have the longest life of any D’Addario acoustic guitar string. The XS coating gives our warm, balanced phosphor bronze strings maximum life, with an uncommonly smooth feel. Made with a NY Steel core, phosphor bronze wrap wire and Fusion Twist technology, XS coated acoustic guitar strings have incomparable break strength and tuning stability, in addition to their dramatically increased lifespan. This custom set was developed in collaboration with Jacob Collier and Taylor Guitars to complement Jacob’s unique 5-string symmetric tuning. This 12-53 Light  5-string set features hand-selected gauges by Taylor’s Andy Powers, this set ensures ideal tension, feel, and pitch accuracy for Jacob’s signature sound.","images":["https://cdn.shopify.com/s/files/1/0669/6042/5025/files/ds_XSAPB1253JC_main_transparent_web.png?v=1773014088","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/ds_XSAPB1253JC_detail1_transparent_web.png?v=1773014088","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/ds_XSAPB1253JC_detail2_transparent_web.png?v=1773014089","https://cdn.shopify.com/s/files/1/0669/6042/5025/files/ds_XSAPB1253JC_detail3_transparent_web.png?v=1773014089"],"price":17.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:55:57.290Z"},"share_url":"https://firestarter.network/l/lst_3vsKKeuI","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_3vsKKeuI' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy 12-53 Jacob Collier Taylor 5-String, XS Phosphor Bronze Acoustic Guitar Strings' and a budget_max comfortably above $17.99 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."]}}