{"type":"firestarter.listing","listing":{"id":"lst_KqUnMiLJ","product_name":"RC2-20 Replacement Cartridge","category":"Detailing Equipment","description":"CR Spotless Cartridges \nThese resin replacement cartridges are easy to install and virtually hassle-free. You can change the resin cartridges in less than 5 minutes. Simply unscrew the watertight housings and remove the spent cartridge. Then, put the replacement cartridges inside the tube and reattach it to the body of the unit. You'll receive two 20-inch replacement cartridges that will deionize approximately 100 gallons of water each.\nThe resin media has a shelf life of 1 year. \nOrders from Hawaii, Alaska, Puerto Rico, or International (Non-USA) will have an additional shipping invoice included.","images":["https://cdn.shopify.com/s/files/1/1239/9256/products/Q4A3551.jpg?v=1636731668","https://cdn.shopify.com/s/files/1/1239/9256/products/Q4A3552.jpg?v=1688069498","https://cdn.shopify.com/s/files/1/1239/9256/products/Q4A3553.jpg?v=1688069498","https://cdn.shopify.com/s/files/1/1239/9256/products/Q4A3554.jpg?v=1688069498","https://cdn.shopify.com/s/files/1/1239/9256/products/Q4A3555.jpg?v=1688069498"],"price":159,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T14:57:00.287Z"},"share_url":"https://firestarter.network/l/lst_KqUnMiLJ","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_KqUnMiLJ' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy RC2-20 Replacement Cartridge' and a budget_max comfortably above $159.00 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."]}}