{"type":"firestarter.listing","listing":{"id":"lst_6jUuHFeG","product_name":"Magnetite","category":null,"description":"Magnetite is a naturally occurring black, ferrous mineral pigment which is also magnetic!  Magnetite is also the natural counterpart to synthetic Mars Black and was named after the location where it was first sourced in 1845, Magnesia, Greece.  \nBlack iron oxides, like Magnetite, have a long history of use as pigments and offer a cool undertone and unique textures.  This color can achieve opacity with a fine texture.\nAll of our watercolors are handmade in our shop using the highest quality earth and synthetic pigments, plus natural watercolor binding medium made from gum arabic (sap from acacia trees), honey, glycerine, distilled water, and a dash of clove oil for freshness!\nHalf Pans contain around 2ml of paint and are approximately 3/4\" x 1/2\" x 3/8\" deep.\nColor Index number as provided by vendor: PBk 11.77499. All of our watercolors conform to ASTM D-4236.","images":["https://cdn.shopify.com/s/files/1/0631/2017/9426/files/magnetite.jpg?v=1684454831","https://cdn.shopify.com/s/files/1/0631/2017/9426/files/Magnetitesquare.jpg?v=1684454831","https://cdn.shopify.com/s/files/1/0631/2017/9426/files/Watercolor_Half_Pan_Trio.jpg?v=1773278386"],"price":12,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:21.933Z"},"share_url":"https://firestarter.network/l/lst_6jUuHFeG","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_6jUuHFeG' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Magnetite' and a budget_max comfortably above $12.00 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."]}}