{"type":"firestarter.listing","listing":{"id":"lst_qPR553kH","product_name":"Twistune","category":"Guitar Accessories","description":" \nRechargeable Twist-On Color Guitar Tuner\nTwistune™ is designed to attach to specific Gruv Gear products for quick and convenient tuning of guitars, basses and other stringed instruments. Simply insert and twist the connector arm 90 degrees to fasten to a Gruv Gear Kaepo™ or our new FretWraps® Pro while attached to your instrument, and you're ready to tune. Make sure your Kaepo or FretWraps Pro is placed on the headstock (behind the nut) and not over the fretboard, so you can tune open strings properly.\n\n\nPitch range is A430 to A450 and can be incrementally adjusted manually. \n\n\nYou may keep Twistune attached during performances, but we recommend to remove it and safely store away after each use. ","images":["https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-BLK-4.png?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune1.jpg?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-attach.jpg?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-1.png?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-2.png?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-3.png?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-BLK-5.jpg?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-BLK-6.jpg?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-BLK-7.png?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-features.jpg?v=1659560027","https://cdn.shopify.com/s/files/1/0931/2816/products/gruvgear-twistune-display.jpg?v=1659560027"],"price":29.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:23.129Z","product_rating":null,"product_rating_count":0,"seller_rating":null,"seller_rating_count":0,"units_sold":0,"reviews":{"count":0,"top":[]},"videos":[]},"share_url":"https://firestarter.network/l/lst_qPR553kH","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_qPR553kH' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Twistune' and a budget_max comfortably above $29.99 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."]}}