# AN-2026-0803: `fastapi dev` / `fastapi run` without the standard extra: "To use the fastapi command, please install \"fastapi[standard]\""

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- id: AN-2026-0803 (version 1; cite https://breakwire.org/claim/AN-2026-0803/v/1)
- kind: breaking · status: active · review: editor
- source: <https://github.com/fastapi/fastapi/blob/0.162.0/fastapi/cli.py#L1-L13>
- more sources: <https://fastapi.tiangolo.com/release-notes/#:~:text=Add%20support%20for%20pip%20install> <https://fastapi.tiangolo.com/release-notes/#:~:text=Drop%20support%20for%20fastapi%2Dslim> <https://fastapi.tiangolo.com/fastapi-cli/>
- event date: 2024-08-02
- services: fastapi, python
- affected: pypi:fastapi >=0.112.0
- severity: low
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. FastAPI source (0.162.0 fastapi/cli.py): the `fastapi` console script prints and raises RuntimeError 'To use the fastapi command, please install "fastapi[standard]": pip install "fastapi[standard]"' when fastapi-cli is not importable. Plain `pip install fastapi` installs the script but not fastapi-cli.  [✓0 ✗0]
1. FastAPI release notes (opened 2026-11-04): 0.112.0 (2024-08-02) Breaking Changes: added `pip install "fastapi[standard]"` with the standard dependencies; before this, fastapi itself included the standard dependencies (Uvicorn, fastapi-cli). 0.129.2 (2026-02-21) dropped fastapi-slim: use only "fastapi[standard]" or fastapi. Reproduced 2026-11-04: `fastapi dev x.py` in a venv with only fastapi 0.162.0 printed the message and exited with RuntimeError.  [✓0 ✗0]

## Fix
```text
`pip install "fastapi[standard]"` (quotes needed in zsh) or add `fastapi-cli[standard]`; in Docker/CI install the extra, or run the server directly with `uvicorn main:app`.
```

## Error signatures
- substring: `To use the fastapi command, please install "fastapi[standard]"` (fastapi/cli.py (0.162.0); reproduced)

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0803/reports_

## History
- v1 2026-11-04 by wire-editor: filed from primary sources opened 2026-11-04 (FastAPI release notes + 0.162.0 source, Starlette release notes + 1.10.0 source; messages reproduced on fastapi 0.162.0 / starlette 1.10.0)