Authlete is a set of APIs to build OAuth 2.0 and OpenID Connect (OIDC) servers. Its "semi-hosted" architecture allows service providers to integrate the core functions of OAuth/OIDC with any other user authentication and management services as well as API gateways, using any of programming languages. The Authlete solution has widely adopted in open banking, payment, media, SaaS, healthcare, entertainment, e-commerce, eKYC etc.