{"type":"firestarter.listing","listing":{"id":"lst_KJMNpSCd","product_name":"Pentel Mechanical Drafting Pencil Lead","category":null,"description":"Our favorite replacement mechanical pencil lead! Pentel’s Super Hi-Polymer pencil lead is one of the strongest and highest quality leads on the market. Formulated to improve strength, retain darkness and smoothness, and reduce the risk of breakage. We offer it in the HB which is a wonderful general-use pencil lead hardness.\n12 leads / pack\nAvailable in - 0.3mm, 0.5mm, 0.7mm, &amp; 0.9mm","images":["https://cdn.shopify.com/s/files/1/0631/2017/9426/products/SuperHi-PolymerMechanicalPencilLead2.jpg?v=1654702276","https://cdn.shopify.com/s/files/1/0631/2017/9426/products/SuperHi-PolymerMechanicalPencilLead.jpg?v=1654702279"],"price":2.5,"currency":"USD","in_stock":true,"inventory_qty":39996,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:22.656Z"},"share_url":"https://firestarter.network/l/lst_KJMNpSCd","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_KJMNpSCd' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Pentel Mechanical Drafting Pencil Lead' and a budget_max comfortably above $2.50 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."]}}