FastAPI 0.143.4 release confirmed: httpx2 becomes an optional dependency

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FastAPI 0.143.4 release confirmed: httpx2 becomes an optional dependency

The stable GitHub release and PyPI uploads confirm the previously pending PR #16512 candidate. It was actually released on October 18 and is included as an unpublished catch-up item, not an October 19 release.

Announced2026-10-18T14:37:55Z

https://github.com/fastapi/fastapi/releases/tag/0.143.4

https://pypi.org/project/fastapi/0.143.4/

https://github.com/fastapi/fastapi/pull/16512

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