{"type":"firestarter.listing","listing":{"id":"lst_YgCWrIyw","product_name":"Permanent Liner - Various Sizes","category":"Pen","description":"Copic Multiliner SP - Select desired sizePermanent Liner PenMade in Japan\nThis is our absolute favorite liner pen!\nReasons we love this pen:\n\nReusable metal barrel\nRefillable ink\nReplaceable nibs\nPermanent, waterproof ink\nArchival pigmented ink\n\n\nWhen you purchase a Copic product, you know you are getting something that is beautifully designed and very high quality.  We use these pens around our studios and I frequently use them in my own artwork.  They are perfect for line drawing that you intend to paint over as they are waterproof.  Also, the replaceable nib means that you can use these on watercolor paper (which is notorious for quickly wearing down fine nibs) and simply replace the nib instead of discarding the entire pen.  Plus, they are beautiful to boot!  Worth the investment - the environment will thank you!\n \n© Greenleaf &amp; Blueberry 2020www.greenleafblueberry.com","images":["https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_1075.jpg?v=1630540101","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_1074.jpg?v=1630540101","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_1076.jpg?v=1630540101","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_1090.jpg?v=1630540101","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2407_66dbc8a3-39b3-4676-8322-a66651a33859.jpg?v=1630540101","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2408_6e34b633-cd63-4a09-9a47-3ded07a392a8.jpg?v=1630540101","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2409_97d9b0b9-387d-4f4d-874e-715ced16eab2.jpg?v=1630540101"],"price":12.5,"currency":"USD","in_stock":true,"inventory_qty":49995,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:23.602Z","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_YgCWrIyw","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_YgCWrIyw' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Permanent Liner - Various Sizes' and a budget_max comfortably above $12.50 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."]}}