{"type":"firestarter.listing","listing":{"id":"lst_KdzzTbhi","product_name":"Stainless Steel Custom Springs","category":"Springs","description":"This page is for our custom stainless steel springs.\nWe have received a lot of requests to purchase the springs that work with both our Parker and G2 format pens individually. Additionally, If you have one of our TiButton® mechanisms there is a small spring inside the button, that you can now purchase individually should you lose yours or want a spare.\nWe have our springs custom made to fit our products, so you can rest assured they are made with the same high quality you've come to expect from NTI.\n\nPrice is per spring.  ","images":["https://cdn.shopify.com/s/files/1/0051/4614/8898/products/ParkerFormatSprings.jpg?v=1679950791","https://cdn.shopify.com/s/files/1/0051/4614/8898/products/G2FormatSprings.jpg?v=1679950795","https://cdn.shopify.com/s/files/1/0051/4614/8898/products/TiButtonMechSprings.jpg?v=1679950799"],"price":5,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:47.753Z"},"share_url":"https://firestarter.network/l/lst_KdzzTbhi","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 ","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_KdzzTbhi' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Stainless Steel Custom Springs' and a budget_max comfortably above $5.00 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."]}}