## Authentication

- [### Authenticate to Service Extensions
  This document describes how to authenticate to Service Extensions
  if you're using REST APIs or Google Cloud CLI.](https://docs.cloud.google.com/service-extensions/docs/authentication)

## Network Services API

- [### REST API references
  View the programming references for Network Services API.](https://docs.cloud.google.com/service-extensions/docs/reference/rest)

## gcloud CLI service-extensions

- [### Google Cloud CLI overview
  View an overview about the gcloud CLI reference.](https://docs.cloud.google.com/sdk/gcloud/reference)
- [### gcloud service-extensions command
  View the Service Extensions gcloud CLI reference
  for callout extensions.](https://docs.cloud.google.com/sdk/gcloud/reference/service-extensions)
- [### gcloud alpha service-extensions command
  View the Service Extensions gcloud CLI reference
  for plugin extensions.](https://docs.cloud.google.com/sdk/gcloud/reference/alpha/service-extensions)