> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tensor9.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Pub/Sub

> Google Cloud Pub/Sub delivers messages from topics to subscriptions, with optional ordering by key and exactly-once delivery for pull subscriptions.

Pub/Sub is available on Google Cloud only.

[Service Catalog](/service-adapters/catalog).