# Socket.IO

**Canonical:** https://apis.io/apis/realtime/socket-io/  
**Provider:** Realtime — https://apis.io/providers/realtime/  
**Documentation:** https://socket.io/

Socket.IO is one of 26 APIs that [Realtime](https://apis.io/providers/realtime/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include WebSocket, Open-Source, Framework, and Node.js. The published artifact set on APIs.io includes API documentation.

A widely deployed open-source realtime engine for Node.js (with clients across JavaScript, Java, Swift, Kotlin, .NET, Python) that layers reconnection, rooms, namespaces, and binary support on top of WebSocket (with HTTP long-polling fallback). Powers chat, dashboards, and collaboration in thousands of production apps.

## Machine-readable artifacts (3)

- **Portal** — https://socket.io/
- **Documentation** — https://socket.io/docs/v4/
- **GitHubOrganization** — https://github.com/socketio

## Other Realtime APIs (12)

- [WebSocket](https://apis.io/apis/realtime/websocket/)
- [Server-Sent Events (SSE)](https://apis.io/apis/realtime/server-sent-events/)
- [WebRTC](https://apis.io/apis/realtime/webrtc/)
- [MQTT](https://apis.io/apis/realtime/mqtt/)
- [CoAP](https://apis.io/apis/realtime/coap/)
- [gRPC Streaming](https://apis.io/apis/realtime/grpc-streaming/)
- [GraphQL Subscriptions](https://apis.io/apis/realtime/graphql-subscriptions/)
- [WebTransport](https://apis.io/apis/realtime/webtransport/)
- [Ably](https://apis.io/apis/realtime/ably/)
- [PubNub](https://apis.io/apis/realtime/pubnub/)
- [Pusher](https://apis.io/apis/realtime/pusher/)
- [LiveKit](https://apis.io/apis/realtime/livekit/)

## Tags

WebSocket, Open-Source, Framework, Node.js

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/realtime/socket-io/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/realtime/.