{"type":"firestarter.listing","listing":{"id":"lst_TXLQYfyf","product_name":"Magnetite","category":null,"description":"Magnetite is a naturally occurring black mineral pigment which is also magnetic! Magnetite is also the natural version of Mars Black. Named in 1845 after the location where it was first sourced, Magnesia, Greece, black iron oxide has a long history of use as a pigment. \nA lustrous, opaque black pigment that is lightfast with a slight texture and cool undertone.\nAll of our watercolors handmade in our shop using the highest quality earth and synthetic pigments and natural watercolor binding medium made from gum arabic (sap from acacia trees), honey, glycerine and distilled water.\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_46008fd2-54b6-430b-9170-a6b7f48ddf9b.jpg?v=1688424850","https://cdn.shopify.com/s/files/1/0631/2017/9426/files/Magnetitesquare_58793c9b-0eee-46b5-8b45-b40703ebec12.jpg?v=1688425618","https://cdn.shopify.com/s/files/1/0631/2017/9426/files/Watercolor_Half_Pan_Trio.jpg?v=1773278386"],"price":6,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:21.925Z"},"share_url":"https://firestarter.network/l/lst_TXLQYfyf","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_TXLQYfyf' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Magnetite' and a budget_max comfortably above $6.00 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."]}}