{"type":"firestarter.listing","listing":{"id":"lst_GDxGnBSh","product_name":"Brush Pen Ink Refill Cartridges - Various Colors","category":"Pen","description":"Pentel Pocket Brush Pen Ink Refill CartridgesColors: Black, Sepia, GreyAll colors sold in 2 PacksBlack available in 6 PackPigmented InkPermanent, WaterproofRefillable, comes with two replacement ink cartridgesMade in Japan\n \nThese are the refill cartridges for the Pentel Pocket Brush Pen.  Ink is waterproof and perfect for creating sketches to watercolor over.  Grey ink allows you to create buildable layers.  It should be noted that all colors are quite dark!\n\n**Please note**: Ink flow may be effected by extreme temperature changes, or changes in air pressure.  If bristles become clogged (as can happy with waterproof ink), remove the tip and rinse with warm water.\n \n© Greenleaf &amp; Blueberry 2021www.greenleafblueberry.com","images":["https://cdn.shopify.com/s/files/1/1696/5931/products/BrushPenInk.jpg?v=1633126782"],"price":5.05,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:23.353Z","product_rating":null,"product_rating_count":0,"seller_rating":null,"seller_rating_count":0,"units_sold":0,"reviews":{"count":0,"top":[]},"videos":[]},"share_url":"https://firestarter.network/l/lst_GDxGnBSh","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_GDxGnBSh' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Brush Pen Ink Refill Cartridges - Various Colors' and a budget_max comfortably above $5.05 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."]}}