{"type":"firestarter.listing","listing":{"id":"lst_tWUqHxq0","product_name":"Zebra G Calligraphy Nib","category":"Calligraphy","description":"The Zebra G is a super flexible and fine nib. It's a firm favourite at the studio and we often recommend it for beginners and professionals alike. Choose Titanium or Chromed finish (the Titanium will last around 4x longer).","images":["https://cdn.shopify.com/s/files/1/0089/6129/4417/products/calligraphy-nib-zebra-g-titanium.jpg?v=1731935075","https://cdn.shopify.com/s/files/1/0089/6129/4417/products/calligraphy-nib-zebra-g-chrome.jpg?v=1731935025"],"price":5,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:24.087Z"},"share_url":"https://firestarter.network/l/lst_tWUqHxq0","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_tWUqHxq0' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Zebra G Calligraphy Nib' and a budget_max comfortably above $5.00 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."]}}