# Streaming GraphQL API

The GraphQL operation type for receiving a stream of updates over a long-lived transport (typically WebSocket via the graphql-ws or graphql-transport-ws sub-protocols, or SSE). Used to push schema- defined deltas to clients.

**Documentation:** https://spec.graphql.org/draft/#sec-Subscription

**References:**

- Documentation: https://spec.graphql.org/draft/#sec-Subscription
- Documentation: https://github.com/enisdenjo/graphql-ws