{"type":"firestarter.listing","listing":{"id":"lst_XuHKzv9M","product_name":"Pewter Lake","category":null,"description":"A lake pigment that is lightfast and semi-transparent and very smooth to paint with, Pewter Lake is made from a French mineral pigment that is fixed to a natural calcium carbonate base which gives these specific lake pigments a soft, velvety and matte finish when dry.\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: Natural Calcium Carbonate Base + PBk11.77499. All of our watercolors conform to ASTM D-4236.","images":["https://cdn.shopify.com/s/files/1/0631/2017/9426/products/Pewter-Lake_1c243d4f-67f5-4d5c-babc-de30f89136b0.jpg?v=1657762596","https://cdn.shopify.com/s/files/1/0631/2017/9426/products/Pewter-Lake-Square_15d9c74c-78e5-4614-9f88-54db9a1ba9ba.jpg?v=1657762596","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":"2026-06-18T20:47:22.446Z"},"share_url":"https://firestarter.network/l/lst_XuHKzv9M","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_XuHKzv9M' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Pewter Lake' 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."]}}