{"type":"firestarter.listing","listing":{"id":"lst_DGWjabnr","product_name":"Walnut Calligraphy Ink","category":"Ink","description":"The highest-quality acrylic-based calligraphy ink, made in the UK. A colour we are nuts about. Sorry, we couldn’t resist that one! But this brown ink gives a beautiful depth to your writing. Its woody hue presents a slightly bronzed tone making it a magical addition to your ink collection.","images":["https://cdn.shopify.com/s/files/1/0089/6129/4417/products/calligraphy-ink-walnut.jpg?v=1745323656"],"price":15.31,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:24.105Z"},"share_url":"https://firestarter.network/l/lst_DGWjabnr","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_DGWjabnr' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Walnut Calligraphy Ink' and a budget_max comfortably above $15.31 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."]}}