Server-Sent Events
conceptprotocol
Overview
Open source✓ Open Source
Use caseserver-to-client event streaming over HTTP for real-time updates
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Server-Sent Events

concept

HTTP-based protocol for server-to-client streaming of events over a single connection

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implemented by

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SafariUnverifiedHighFresh1
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alternative to

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WebSocketUnverifiedHighFresh1

used by

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Model Context ProtocolUnverifiedHighFresh1

open source

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trueUnverifiedHighFresh1

primary use case

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server-to-client event streaming over HTTP for real-time updatesUnverifiedHighFresh1

standardized by

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W3CUnverifiedHighFresh1

governed by

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WHATWG HTML Living StandardUnverifiedHighFresh1

developed by

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WHATWG (Web Hypertext Application Technology Working Group)UnverifiedHighFresh1

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Claim count: 11Last updated: 4/9/2026Edit history