{"type":"firestarter.listing","listing":{"id":"lst_1agXAnol","product_name":"Wren - Collet","category":"Wren","description":"Ensure your Wren pen remains in perfect working condition with this replacement collet. The collet is a crucial component that sits in the cavity of your nib, positioned between the Wren tip and the Wren tip cover on the inside of the pen. Its primary function is to secure the nib firmly in place, ensuring that the writing experience is smooth and uninterrupted.\nOver time, or during nib changes, it’s easy for this small but essential part to be misplaced or lost. With this spare collet, you can quickly replace a lost or damaged piece and continue enjoying your Wren pen without any hassle.\n","images":["https://cdn.shopify.com/s/files/1/0089/6129/4417/files/wren-collet.jpg?v=1741256362"],"price":1,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:23.281Z"},"share_url":"https://firestarter.network/l/lst_1agXAnol","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_1agXAnol' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Wren - Collet' and a budget_max comfortably above $1.00 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."]}}