SSE
conceptprotocol
Overview
Developed byW3C
Open source✓ Open Source
Use casestreaming LLM responses from server to client over HTTP
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Avg confidence93%
Avg freshness99%
Last updatedUpdated yesterday
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Governance

SSE

concept

Server-Sent Events API for receiving automatic updates from a server via HTTP

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primary use case

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streaming LLM responses from server to client over HTTPUnverifiedHighFresh1

used by

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OpenAI Chat Completions APIUnverifiedHighFresh1
Vercel AI SDKUnverifiedHighFresh1

alternative name for

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Server-Sent EventsUnverifiedHighFresh1

implemented by

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ChromeUnverifiedHighFresh1
FirefoxUnverifiedHighFresh1
SafariUnverifiedHighFresh1

open source

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trueUnverifiedHighFresh1

alternative to

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WebSocketsUnverifiedModerateFresh1
Long pollingUnverifiedModerateFresh1

developed by

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W3CUnverifiedModerateFresh1

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