The following list shows which services are supported in second-generation runtimes: | App Engine service | Availability in Python | Alternatives | |---|---|---| | App Identity | Available | Migrate to [Open ID Connect (OIDC) ID tokens](https://docs.cloud.google.com/appengine/migration-center/standard/python/migrate-app-identity) or [Identity Platform](https://docs.cloud.google.com/iap/docs/concepts-overview) | | Blobstore | Available | Migrate to [Cloud Storage](https://docs.cloud.google.com/appengine/migration-center/standard/python/migrate-to-cloud-storage) | | Capabilities | Available | No alternatives, see the [Google Cloud Service Health dashboard](https://status.cloud.google.com) or the [Google Cloud console support page](https://console.cloud.google.com/support/) for information on service status | | Deferred | Available | No alternatives since this API is used with App Engine Task Queues | | Images | Available | Migrate to [Cloud Storage](https://docs.cloud.google.com/appengine/docs/standard/serving-static-files#serving_files_from) to serve images directly, or use a third-party content delivery network (CDN) or [image processing library](https://docs.cloud.google.com/appengine/migration-center/standard/services/migrating-services#images) | | Logging | Not supported | Use [standard logging libraries](https://docs.cloud.google.com/appengine/docs/standard/writing-application-logs) | | Namespaces | Available | No alternatives since this API is used with other App Engine services | | Datastore | Available | Migrate to [Datastore client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries) | | Mail | Available | [Migrate to an SMTP-based email service](https://docs.cloud.google.com/appengine/migration-center/standard/python/mail-to-smtp), such as SendGrid, Mailgun, or Mailjet for outbound messaging only | | Memcache | Available | Migrate to [Memorystore](https://docs.cloud.google.com/appengine/migration-center/standard/python/memcache-to-memorystore) | | Modules | Available | Use environment variables and the [App Engine Admin API](https://docs.cloud.google.com/appengine/docs/admin-api) to obtain information and modify your application's running services | | NDB | Available | Migrate to [Cloud NDB](https://docs.cloud.google.com/appengine/migration-center/standard/python/migrate-to-cloud-ndb) | | Remote | Not supported | Use Cloud Client Libraries to access resources in other projects | | Search | Available | Migrate to [Elasticsearch](https://www.elastic.co/elasticsearch/) | | Task Queues | Available | Migrate to [Cloud Tasks for push queues](https://docs.cloud.google.com/appengine/migration-center/standard/python/migrating-push-queues) and [Pub/Sub for pull queues](https://docs.cloud.google.com/appengine/migration-center/standard/python/migrating-pull-queues) | | URL Fetch | Available | Migrate to [standard libraries for outbound requests](https://docs.cloud.google.com/appengine/migration-center/standard/python/migrate-outbound-requests) | | Users | Available | Migrate to [user authentication options](https://docs.cloud.google.com/appengine/docs/standard/authenticating-users) |
For more information, refer to the user guides located on the left-side navigation or see the [API reference documentation](https://docs.cloud.google.com/appengine/docs/standard/services/ /appengine/docs/standard/python3/reference/services/bundled/google/appengine ).