# Reduce real-time cloud spend with Federated Subscriptions support for HTTP Callbacks

DevFeed: [Reduce real-time cloud spend with Federated Subscriptions support for HTTP Callbacks](<https://devfeed.tech/articles/reduce-real-time-cloud-spend-with-federated-subscriptions-support-for-http-callbacks-23492.md>)

Original publisher: [Read original article](<https://www.apollographql.com/blog/reduce-real-time-cloud-spend-with-federated-subscriptions-support-for-http-callbacks>)

Author: Andrew I. Carlson

Published: 2024-02-01T10:00:00Z

Content type: release

Language: en

Sources: [Apollo Blog](<https://devfeed.tech/sources/apollo-blog.md>)

Topics: [GraphQL](<https://devfeed.tech/topics/graphql.md>), [API](<https://devfeed.tech/topics/api.md>), [WebSocket](<https://devfeed.tech/topics/websocket.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>)

Tags: [announcement](<https://devfeed.tech/tags/announcement.md>), [apollo](<https://devfeed.tech/tags/apollo.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [graphql](<https://devfeed.tech/tags/graphql.md>), [release](<https://devfeed.tech/tags/release.md>), [scalability](<https://devfeed.tech/tags/scalability.md>), [websocket](<https://devfeed.tech/tags/websocket.md>)

## AI overview

Apollo announces HTTP callback support in Apollo Router 1.37 for federated GraphQL subscriptions. The feature reduces backend WebSocket connections between the router and subgraphs, improving efficiency and interoperability for real-time applications and potentially reducing cloud spend at scale.

## Source excerpt

Modern apps must support real-time use cases like flight changes, team collaboration, or live score updates for the big game. GraphQL subscriptions push events in a more efficient and performant way compared to traditional client-side polling of RESTful services that try to pull new events every few seconds.