{"type":"firestarter.listing","listing":{"id":"lst_HcW4qjb1","product_name":"Tesla Coil","category":"Ink Bottle","description":"One of our most popular inks, Tesla Coil is a rich cobalt blue color that will produce a iridescent magenta sheening effect when saturated on high-quality papers like Tomoe River and Rhodia. The pictured writing sample is made on 68 gsm Tomoe River paper with a cotton swab and medium nib. This colorant will produce a pure cobalt blue on sorbent papers.\n*Fountain pen ink sheen properties are best expressed when the ink is saturated on slightly hydrophobic papers like Tomoe River or Rhodia. Get the best results with a wet line.  Visible coloring will vary drastically by paper type and saturation.\nTesla Coil is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 90mL volume will provide approximately 112 standard converter refills assuming a 0.8mL draw. We manufacture this ink in Pennsylvania with domestic and imported ingredients.","images":["https://cdn.shopify.com/s/files/1/1237/1088/files/Tesla_Coil.jpg?v=1770136095","https://cdn.shopify.com/s/files/1/1237/1088/products/Telsa-Coil-Writing-Sample-68gsm-Tomoe.jpg?v=1770136095","https://cdn.shopify.com/s/files/1/1237/1088/files/Tesla_Coil_4393c4ed-15e4-4905-85e2-471e89dc0834.jpg?v=1779376595","https://cdn.shopify.com/s/files/1/1237/1088/files/InkBottleBox60mL_0a278b25-7324-4d68-a5ae-69dec2047f02.jpg?v=1770136095"],"price":29,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:18.711Z"},"share_url":"https://firestarter.network/l/lst_HcW4qjb1","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_HcW4qjb1' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Tesla Coil' and a budget_max comfortably above $29.00 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."]}}