{"ucp":{"version":"2026-04-08","services":{"dev.ucp.shopping":[{"version":"2026-04-08","spec":"https://ucp.dev/2026-04-08/specification/overview","transport":"rest","schema":"https://ucp.dev/2026-04-08/services/shopping/rest.openapi.json"}]},"capabilities":{"dev.ucp.shopping.checkout":[{"version":"2026-04-08","spec":"https://ucp.dev/2026-04-08/specification/checkout","schema":"https://ucp.dev/2026-04-08/schemas/shopping/checkout.json"}],"dev.ucp.shopping.fulfillment":[{"version":"2026-04-08","spec":"https://ucp.dev/2026-04-08/specification/fulfillment","schema":"https://ucp.dev/2026-04-08/schemas/shopping/fulfillment.json","extends":"dev.ucp.shopping.checkout"}],"dev.ucp.shopping.order":[{"version":"2026-04-08","spec":"https://ucp.dev/2026-04-08/specification/order","schema":"https://ucp.dev/2026-04-08/schemas/shopping/order.json","config":{"webhook_url":"https://platform.example.com/webhooks/ucp/orders"}}],"dev.ucp.shopping.discount":[{"version":"2026-04-08","spec":"https://ucp.dev/2026-04-08/specification/discount","schema":"https://ucp.dev/2026-04-08/schemas/shopping/discount.json"}]},"payment_handlers":{"com.google.pay":[{"id":"gpay_1234","version":"2024-12-03","spec":"https://pay.google.com/gp/p/ucp/2026-01-23/","schema":"https://pay.google.com/gp/p/ucp/2026-01-23/schemas/config.json"}],"dev.shopify.shop_pay":[{"id":"shop_pay_1234","version":"2026-04-08","spec":"https://shopify.dev/ucp/shop-pay-handler","schema":"https://shopify.dev/ucp/schemas/shop-pay-config.json","available_instruments":[{"type":"shop_pay"}]}],"dev.ucp.processor_tokenizer":[{"id":"processor_tokenizer","version":"2026-04-08","spec":"https://example.com/specs/payments/processor_tokenizer-payment","schema":"https://example.com/schemas/payments/delegate-payment.json","available_instruments":[{"type":"card","constraints":{"brands":["visa","mastercard"]}}]}]}},"signing_keys":[{"kid":"platform_2025","kty":"EC","crv":"P-256","x":"MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4","y":"4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM","use":"sig","alg":"ES256"}]}