Issuers connect to the Fusion Platform once — either via API (server-to-server) or SDK (client-side). The platform maintains certified, live connections to Visa Token Service, Mastercard Digital Enablement Service, and other major scheme security services. When an issuer wants to activate a new capability — say, payment passkeys when their card network announces a mandate — they make an API call to activate that service. The Fusion Platform already has the scheme connection in place. There is no new certification, no new vendor onboarding, no new integration project. The capability is live in days, not months.