# Authlete > Authlete is an API-first OAuth 2.0 and OpenID Connect backend service. It provides a headless > authorization-server engine that handles OAuth/OIDC protocol operations and token management, > letting organizations stand up standards-compliant authorization servers and verifiable-credential > issuers without building the protocol layer themselves. Deployment models include a managed shared > cloud, dedicated cloud, and self-managed, across US, Japan, Europe, and Brazil regional clusters. > Advanced profiles include FAPI / FAPI 2.0, CIBA, PAR, Device Flow, Grant Management, OpenID > Federation, Native SSO, and OID4VCI, plus regional standards (Brazil Open Banking, Australia CDR). ## APIs - [Authlete API (OpenAPI 3.0.16)](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/openapi/authlete-openapi-original.yml): 82 paths / 86 operations across Management (services, clients) and Runtime (authorization, token, introspection, CIBA, VCI, federation) endpoints. ## Specs & Artifacts - [Authentication profile](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/authentication/authlete-authentication.yml) - [API conventions](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/conventions/authlete-conventions.yml) - [Conformance / standards](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/conformance/authlete-conformance.yml) - [Error / problem types](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/errors/authlete-problem-types.yml) - [Lifecycle & versioning](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/lifecycle/authlete-lifecycle.yml) - [Data model / ERD](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/data-model/authlete-data-model.yml) - [Packages / SDKs](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/packages/authlete-packages.yml) - [CLI](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/cli/authlete-cli.yml) - [Agentic access contracts](https://raw.githubusercontent.com/api-evangelist/authlete/refs/heads/main/agentic-access/authlete-agentic-access.yml) ## Docs - [API Reference](https://docs.authlete.com/) - [Developer Portal](https://www.authlete.com/developers/) - [Getting Started](https://www.authlete.com/developers/getting_started/) - [Management Console](https://console.authlete.com/) - [Release Notes](https://www.authlete.com/developers/relnotes/) - [Knowledge Base](https://www.authlete.com/kb/) - [GitHub Organization](https://github.com/authlete) - [Service Status](https://www.authlete.com/service-status) - [Pricing](https://www.authlete.com/pricing)