{"type":"firestarter.listing","listing":{"id":"lst_elAh7Clx","product_name":"Monotonic","category":null,"description":"Monotonic is a versatile ink-channel solution that expedites fountain pen testing, tuning, maintenance, and cleaning. Our gentle, handmade formula streamlines similar operations at the workshop and is compatible with all fountain pens. Containing zero dyes or pigments, Monotonic is designed with components of a standard fountain pen ink vehicle to leverage the utility of a writing backbone without the extra attention required to work around colorant. Monotonic is built with a highly purified water diluent and a delicate mixture of humectant, lubricant, and preservative. The solution will safely air-dry after use or operate as the segue to a new ink while still damp with a minimal impact on performance and hue.\nEach unit comes prepared in an amber glass dropper bottle with 110mL of product. DOES NOT contain ammonia or bleach.","images":["https://cdn.shopify.com/s/files/1/1237/1088/files/Monotonic_Elixir.jpg?v=1756819606","https://cdn.shopify.com/s/files/1/1237/1088/products/ink-bottle-box.jpg?v=1774542380"],"price":25,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:18.579Z"},"share_url":"https://firestarter.network/l/lst_elAh7Clx","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_elAh7Clx' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Monotonic' and a budget_max comfortably above $25.00 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."]}}