{"type":"firestarter.listing","listing":{"id":"lst_uW44QJgd","product_name":"Big League Heavyweight T-Shirt","category":"Tees","description":"Description\nOur Big League Heavyweight T-shirt is produced in a custom-developed heavyweight jersey fabric, the result of years of development. The knit is made with long-staple, ring-spun and combed cotton yarn, providing both incredible softness and durability. Nearly double the weight of our regular T-shirt, the tightly knitted construction creates a drape with a more boxy silhouette. The collar is finished with a double-needle mounted construction, a nod to the vintage sportswear tees we’ve always appreciated. Features a script logo inspired by classic baseball emblems—an ode to the souvenirs found near our flagship store on Canal Street.\nDetails\n\n100% cotton, 10 oz jersey knitted in Portugal\nPre-shrunk\nScreen-printed\nMade in Portugal\n\nCare\nWash on cold and tumble dry on low","images":["https://cdn.shopify.com/s/files/1/0009/8100/8447/files/Big_League_Heavyweight_T-Shirt_Black_Front.jpg?v=1767989135","https://cdn.shopify.com/s/files/1/0009/8100/8447/files/Big_League_Heavyweight_T-Shirt_Milk_Front.jpg?v=1767989135","https://cdn.shopify.com/s/files/1/0009/8100/8447/files/Big_League_Heavyweight_T-Shirt_Oat_Grey_Front.jpg?v=1767989135"],"price":95,"currency":"USD","in_stock":true,"inventory_qty":129987,"dynamic_pricing":false,"listed_at":"2026-06-18T20:30:23.629Z"},"share_url":"https://firestarter.network/l/lst_uW44QJgd","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_uW44QJgd' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Big League Heavyweight T-Shirt' and a budget_max comfortably above $95.00 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."]}}