Creating and Deploying an API
-   About the API Gateway development environmentDescribes the API Gateway development environment. 
-   Configuring the development environmentDescribes how to configure your development environment for API development. 
-   Creating an APIDescribes how to create an API. 
-   Creating an API configDescribes how to create an API config using OpenAPI. 
-   Configuring a gRPC serviceDescribes how to create an API config using a gRPC service definition. 
-   Deploying an API to a gatewayDescribes how to deploy an API config to a gateway. 
-   Passing data to and from the backend serviceDescribes how to pass data to the backend service and receive data back. 
Troubleshooting & Monitoring
-   Troubleshooting overviewProvides general troubleshooting information. 
-   Monitoring your APIDescribes how to monitor the health of APIs using the logs and metrics Endpoints maintains for you automatically. 
-   Tracing your APIExplains the trace sampling rate, how to estimate your cost for Cloud Trace, how to view the traces in the Cloud console, and how to disable trace sampling. 
-   Accessing audit logsDescribes the audit logs created by API Gateway as part of Cloud Audit Logs. 
Authentication & API Keys
-   Choosing an Authentication MethodProvides an overview and sample use cases for each supported authentication method. 
-   Using JWT to authenticate usersProvides an overview of user authentication using JSON Web Token (JWT). 
-   Using Firebase to authenticate usersProvides an overview of user authentication using Firebase. 
-   Using AuthO to authenticate usersProvides an overview of user authentication using AuthO. 
-   Using Okta to authenticate usersProvides an overview of user authentication using Okta. 
-   Using GoogleID tokens to authenticate usersProvides an overview of user authentication using GoogleID tokens. 
-   Authentication between servicesDescribes how to use service accounts to authenticate human or machine users. 
-   Securing backend servicesDescribes how to secure your backend services and grant the roles and permissions your gateway needs to access those services.