Automatic OpenTelemetry exporter setup is now opt-in. If you rely on FastAPI to configure exporters from OTEL_* environment variables, set FASTAPI_OTEL_AUTO_CONFIGURE=true or use FastAPI(telemetry={"auto_configure": True}) to retain the previous behavior.

Applications that configure their own providers and exporters require no changes. FastAPI Cloud enables automatic setup for you.

Breaking Changes

• 💥 Require opt-in for automatic OpenTelemetry exporter setup. PR #16476 by @tiangolo.

Fixes

• 🐛 Isolate FastAPI telemetry for excluded requests. PR #16470 by @tiangolo.

Fixes

• 🐛 Cache OpenTelemetry tracers to preserve warning deduplication. PR #16468 by @tiangolo.

Docs

• 📝 Remove HTML title from newsletter to avoid the tooltip. PR #16461 by @tiangolo.
• 📝 Embed the FastAPI and friends newsletter signup form. PR #16459 by @tiangolo.
• 📝 Update skill, use Asyncer for blocking code in threads. PR #16420 by @tiangolo.

Translations

• 🌐 Update translations for fr (add-missing). PR #16436 by @pr-submit[bot].
• 🌐 Update translations for hi (add-missing). PR #16435 by @pr-submit[bot].
• 🌐 Update translations for tr (add-missing). PR #16434 by @pr-submit[bot].
• 🌐 Update translations for zh (add-missing). PR #16433 by @pr-submit[bot].
• 🌐 Update translations for zh-hant (add-missing). PR #16432 by @pr-submit[bot].
• 🌐 Update translations for pt (add-missing). PR #16431 by @pr-submit[bot].
• 🌐 Update translations for de (add-missing). PR #16430 by @pr-submit[bot].
• 🌐 Update translations for uk (add-missing). PR #16429 by @pr-submit[bot].
• 🌐 Update translations for ja (add-missing). PR #16428 by @pr-submit[bot].
• 🌐 Update translations for ko (add-missing). PR #16425 by @pr-submit[bot].
• 🌐 Update translations for es (add-missing). PR #16426 by @pr-submit[bot].
• 🌐 Update translations for ru (add-missing). PR #16427 by @pr-submit[bot].
• 🌐 Update Russian LLM-prompt. PR #16449 by @YuriiMotov.

Internal

• 👷 Fix deprecated command in bump-pre-commit-hooks workflow. PR #16463 by @YuriiMotov.
• 🔧 Update sponsors: remove Render. PR #16457 by @tiangolo.
• 🔨 Use gpt-6-astra model for translations. PR #16453 by @YuriiMotov.
• ⬆ Bump the python-packages group across 1 directory with 14 updates. PR #16447 by @dependabot[bot].
• ⬆ Bump starlette from 1.6.0 to 1.7.0. PR #16440 by @dependabot[bot].
• ⬆ Bump pyjwt from 2.13.0 to 2.15.0. PR #16423 by @dependabot[bot].
• ⬆ Bump gitpython from 3.1.60 to 3.1.62. PR #16444 by @dependabot[bot].
• 👥 Update FastAPI GitHub topic repositories. PR #16443 by @pr-submit[bot].
• 👥 Update FastAPI People - Sponsors. PR #16437 by @pr-submit[bot].
• ⬆ Bump pre-commit hooks. PR #16442 by @pr-submit[bot].
• ⬆ Bump urllib3 from 2.7.0 to 2.8.0. PR #16445 by @dependabot[bot].
• ⬆ Bump the github-actions group with 3 updates. PR #16438 by @dependabot[bot].

Fixes

• 🐛 Allow startup when automatic OpenTelemetry configuration fails. PR #16418 by @tiangolo.

Fixes

• 🐛 Fix repeated endpoint wrapping in included routers. PR #16414 by @tiangolo.

Features

• ✨ Add native OpenTelemetry support. PR #16403 by @tiangolo.

Refactors

• 📱 Improve mobile responsiveness of conference rail. PR #16196 by @alejsdev.
• ♻️ Remove conf section and add event banner. PR #16193 by @alejsdev.

Docs

• 🔥 Remove unused image. PR #16195 by @alejsdev.
• 🐛 Use buttons for Termynal controls. PR #16132 by @tiangolo.

Translations

• 🌐 Update translations for hi (update-outdated). PR #16212 by @pr-submit[bot].
• 🌐 Update translations for ru (update-outdated). PR #16210 by @pr-submit[bot].
• 🌐 Update translations for zh-hant (update-outdated). PR #16211 by @pr-submit[bot].
• 🌐 Update translations for uk (update-outdated). PR #16208 by @pr-submit[bot].
• 🌐 Update translations for de (update-outdated). PR #16209 by @pr-submit[bot].
• 🌐 Update translations for tr (update-outdated). PR #16207 by @pr-submit[bot].
• 🌐 Update translations for ja (update-outdated). PR #16206 by @pr-submit[bot].
• 🌐 Update translations for fr (update-outdated). PR #16205 by @pr-submit[bot].
• 🌐 Update translations for zh (update-outdated). PR #16204 by @pr-submit[bot].
• 🌐 Update translations for es (update-outdated). PR #16203 by @pr-submit[bot].
• 🌐 Update translations for pt (update-outdated). PR #16202 by @pr-submit[bot].
• 🌐 Update translations for ko (update-outdated). PR #16201 by @pr-submit[bot].
• 🌐 Update translations for ko (update-outdated). PR #16171 by @pr-submit[bot].

Internal

• ✅ Fix frontend test timeout with Starlette Git. PR #16408 by @YuriiMotov.
• 🔧 Update sponsors: remove Permit.io. PR #16406 by @tiangolo.
• ⬆ Bump anyio from 4.12.1 to 4.14.2. PR #16375 by @dependabot[bot].
• ⬆ Bump the python-packages group across 1 directory with 15 updates. PR #16285 by @dependabot[bot].
• ⬆ Bump starlette from 1.3.1 to 1.6.0. PR #16289 by @dependabot[bot].
• ⬆ Bump annotated-doc from 0.0.4 to 0.0.5. PR #16288 by @dependabot[bot].
• ⬆ Bump typing-inspection from 0.4.2 to 0.4.4. PR #16286 by @dependabot[bot].
• ⬆ Bump fastar from 0.11.0 to 0.12.0. PR #16287 by @dependabot[bot].
• ⬆ Bump the github-actions group with 5 updates. PR #16284 by @dependabot[bot].
• ⬆ Bump pre-commit hooks. PR #16290 by @pr-submit[bot].
• 👥 Update FastAPI GitHub topic repositories. PR #16291 by @pr-submit[bot].
• 👥 Update FastAPI People - Sponsors. PR #16282 by @pr-submit[bot].
• ⬆️ Bump Typer min version to 0.26.1. PR #16252 by @YuriiMotov.
• ⬆️ Bump setup-uv action to 10.0.1. PR #16249 by @YuriiMotov.
• 👷 Update translation PR branches with PR Push. PR #16224 by @tiangolo.
• ⏪️ Restore commit_in_place input in translate.yml. PR #16216 by @YuriiMotov.
• 👷 Migrate automatic labels to Latest Changes. PR #16185 by @tiangolo.
• 👷 Fix branch name in zizmor.yml workflow (main -> master). PR #16178 by @YuriiMotov.
• 👷 Remove legacy label check. PR #16180 by @tiangolo.
• ⬆ Bump pymdown-extensions from 11.0 to 11.0.1. PR #16162 by @dependabot[bot].
• ⬆ Bump gitpython from 3.1.57 to 3.1.58. PR #16157 by @dependabot[bot].
• 👥 Update FastAPI People - Sponsors. PR #16175 by @pr-submit[bot].
• 🐛 Fix Sponsors Git authentication. PR #16174 by @tiangolo.
• 👥 Update FastAPI GitHub topic repositories. PR #16173 by @pr-submit[bot].
• 🔐 Use PR Submit for automated updates. PR #16172 by @tiangolo.
• 🔐 Use PR Submit for translations. PR #16168 by @tiangolo.
• ⬆️ Raise pytest-xdist minimum. PR #16170 by @tiangolo.
• 🔐 Use PR Submit for pull requests. PR #16167 by @tiangolo.
• 👷 Use GitHub CLI for Git authentication. PR #16166 by @tiangolo.
• 👷 Use PR Push commit identity. PR #16164 by @tiangolo.
• 🔒 Replace pre-commit PAT with PR Push. PR #16161 by @tiangolo.
• 👷 Disable saving Zensical's .cache in build-docs.yml. PR #16156 by @YuriiMotov.
• 🔥 Remove the old Latest Changes workflow. PR #16148 by @tiangolo.
• ⬆ Bump the python-packages group with 12 updates. PR #16121 by @dependabot[bot].
• ⬆ Bump cryptography from 48.0.1 to 50.0.0. PR #16142 by @dependabot[bot].
• ⬆ Bump gitpython from 3.1.54 to 3.1.57. PR #16141 by @dependabot[bot].
• ⬆ Bump the github-actions group with 6 updates. PR #16120 by @dependabot[bot].
• 👥 Update FastAPI GitHub topic repositories. PR #16122 by @tiangolo.
• 👥 Update FastAPI People - Sponsors. PR #16119 by @tiangolo.

Fixes

• 🐛 Fix support for background tasks and headers from dependencies in app.frontend(). PR #16105 by @tiangolo.

Docs

• 📝 Document FASTAPI_ENV in FastAPI CLI guide. PR #16104 by @tiangolo.

Features

• ✨ Add app.frontend(check_dir="auto"), to make local development more convenient with fastapi dev. PR #16102 by @tiangolo.

Fixes

• 🐛 Fix status_code being ignored for SSE and JSONL streaming endpoints. PR #15937 by @SAURABHSALVE.

Docs

• 📝 Fix format_sse_event docstring rendering of \n\n terminator. PR #15613 by @AshNicolus.
• 📝 Add API reference page for fastapi.sse. PR #15930 by @SAURABHSALVE.

Fixes

• 🐛 Fix line splitting in format_sse_event to comply with SSE spec. PR #15515 by @Zawwarsami16.