SSE-Starlette

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library 3.3.3 ·python
verified Jun 9, 2026 install

sse-starlette is a production-ready Python library that provides a Server-Sent Events (SSE) plugin for Starlette and FastAPI frameworks. It offers a standards-compliant implementation of the W3C SSE specification, including features like automatic client disconnect detection, graceful shutdown, and thread-safe event management. The current version is 3.3.3, and the library maintains an active release cadence with regular updates and dependency management.

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