{"type":"firestarter.listing","listing":{"id":"lst_jvZAyNgB","product_name":"The Geometer's Tool – Master Brass Ruler for Angles - Lines & Measurements","category":"Protractor","description":"100% Handmade in Turkey\nSolid Brass The Geometer's Tool \nMeasure Twice , Cut Once , Create Always\nThis is the perfect antique-inspired accessory for your desk or to carry with your journal. Made of 100% solid brass and etched for durability with both imperial scales. The geometer's tool  includes a protractor, imperial and metric measurements. It makes the perfect reference point for all applications.\n\nProduct Details\n\nLength: 6\"\nRuler 6\" and 15 cm\nBlack etched scale\nThick brass\nProtractor\n\nTriangles 30, 45, 60 , 90 degrees\nImperial and Metric Measurements\nParallel Lines for Easy Alignment\nGood for cutting \nHandcrafted in Istanbul, Turkey\n\nWhat is a protractor?\nThe protractor is an instrument used for measuring angles. The protractor is usually had a semi-circle size divided into one hundred and eighty parts or a full circle divided into three hundred and sixty parts. \nPlease note: The brass is unpolished, and will contain superficial scratches throughout. Expect this protractor to appear somewhat industrial in nature.","images":["https://cdn.shopify.com/s/files/1/0575/7177/files/The-Geometers-Tool-Master-Brass-Ruler-for-Angles-Lines-Measurements.jpg?v=1768314662"],"price":22,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:59.703Z"},"share_url":"https://firestarter.network/l/lst_jvZAyNgB","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_jvZAyNgB' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy The Geometer's Tool – Master Brass Ruler for Angles - Lines & Measurements' and a budget_max comfortably above $22.00 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."]}}