{"type":"firestarter.listing","listing":{"id":"lst_dV9Fd1HB","product_name":"Optical Calcite Prism","category":null,"description":"- Approximate size at longest measurement:         - Small: 1.2 - 1.4\"        - Medium: 1.6 - 1.8\"- Listing is for (1) crystalYou will receive a crystal that is very similar to the crystals pictured (not identical). Since these come from nature each will be a little different, and it is normal to find a formation crack line, small hole, difference in shape/color, or small inclusion of another material. But all will be equally beautiful - I am picky! ♡ ♡ ♡","images":["https://cdn.shopify.com/s/files/1/1433/7246/files/20260426_051339011_iOS1.jpg?v=1777194395","https://cdn.shopify.com/s/files/1/1433/7246/files/20260426_051141279_iOS1.jpg?v=1777194395","https://cdn.shopify.com/s/files/1/1433/7246/files/20260426_050657942_iOS1.jpg?v=1777194395"],"price":15,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:25.223Z"},"share_url":"https://firestarter.network/l/lst_dV9Fd1HB","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_dV9Fd1HB' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Optical Calcite Prism' and a budget_max comfortably above $15.00 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."]}}