{"type":"firestarter.listing","listing":{"id":"lst_MBYmBlas","product_name":"Manticore Vertical Uprights","category":"Rack Component","description":"Looking to upgrade your Manticore Rack? Or build your own franken-rack? Maybe even upgrade your non-Bells of Steel Rack that's also true 3 x 3 inch with 1-inch holes?Uprights are the vertical bars that connect the crossmembers of your power rack. They're easy to install and come in different lengths and styles to suit your needs and preferencesThey add functionality to your rack by allowing you to mount rack attachments like a seal row pad, lever arms, and more.Unless otherwise indicated, uprights are sold in pairs (2 pieces) and do not include hardware.NOTE: 108\" Uprights are available in our rack builders. If you want to purchase the uprights separately from the builders, please contact our sales team.IMPORTANT: If joining to crossmembers, requires two 36mm wrenches to install (not included by default). Correctly sized box-end, adjustable &amp; socket wrenches are suitable alternatives.","images":["https://cdn.shopify.com/s/files/1/0654/3346/9125/files/108-KU-MTC-PAIR-carousel-primary_e1f6abcd-69c7-4c91-95c1-5a84db8ef7fa.jpg?v=1768611841"],"price":343.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:45.276Z"},"share_url":"https://firestarter.network/l/lst_MBYmBlas","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_MBYmBlas' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Manticore Vertical Uprights' and a budget_max comfortably above $343.99 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."]}}