OpenAPI Generator Authentication — Configuring Security Schemes for Generated Client SDKs

In this tutorial, you will learn about OpenAPI Generator Authentication. We cover key concepts, practical examples, and best practices to help you master this topic.

OpenAPI Generator authentication configures security schemes in the spec so generated clients handle API keys, bearer tokens, OAuth2 flows, and Openid Connect authentication automatically.

What You'll Learn

• Security scheme types in OpenAPI spec
• API key authentication in generated clients
• Bearer token and JWT configuration
• OAuth2 flow configuration
• OpenID Connect discovery

Why It Matters

Authentication is the most common customization needed in generated SDKs. Without proper security scheme configuration, developers must manually add auth headers to every API call. DodaTech's generated clients automatically handle token acquisition, refresh, and header injection.

flowchart LR
    A["OpenAPI Security Schemes"] --> B["apiKey: API key in header/query"]
    A --> C["http: Bearer JWT token"]
    A --> D["oauth2: OAuth2 flows"]
    A --> E["openIdConnect: OIDC discovery"]

    B --> F["Generated: Adds X-API-Key header"]
    C --> G["Generated: Adds Authorization: Bearer"]
    D --> H["Generated: Token acquisition + refresh"]
    E --> I["Generated: JWKS + OIDC discovery"]

    F --> J["Authenticated requests"]
    G --> J
    H --> J
    I --> J

What's Next

Apply authentication patterns in your {{< ilink "OpenAPI" "OpenAPI Generator Workflows" }} and review {{< ilink "OpenAPI" "OpenAPI Generator Specification" }} for security scheme definitions.