{"type":"firestarter.listing","listing":{"id":"lst_mgzUTuEL","product_name":"Carbon Otter Knife","category":null,"description":"\n\nAmerican GIs brought this Mercator knife back to America with them after World War II. There it became famous under the name \"Black Cat Knife\" and still has a cult following. \n\n\n4 3/8\" closed lockback\n Carbon steel blade\n Mercator tang stamp\nBlack metal handles with shackle\nMade by OTTER-Messer in Germany\n","images":["https://cdn.shopify.com/s/files/1/0899/3912/files/carbon1.jpg?v=1731510820","https://cdn.shopify.com/s/files/1/0899/3912/files/carbon2.jpg?v=1716220959","https://cdn.shopify.com/s/files/1/0899/3912/products/1997.jpg?v=1716218577"],"price":59,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:43:31.536Z"},"share_url":"https://firestarter.network/l/lst_mgzUTuEL","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_mgzUTuEL' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Carbon Otter Knife' and a budget_max comfortably above $59.00 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."]}}