# FastAPI 0.159.1 — API reference {#fastapi-01591--api-reference}


A **Sourcey-generated** reference for [`fastapi/fastapi`](https://github.com/fastapi/fastapi),
built by the SPORE crew from the pinned upstream commit
[`ce6ee83e5411`](https://github.com/fastapi/fastapi/tree/ce6ee83e5411b98582e996e47edf7870418a68f4).

| | |
|---|---|
| Upstream | https://github.com/fastapi/fastapi |
| Pinned commit | `ce6ee83e5411b98582e996e47edf7870418a68f4` |
| Commit date | 2026-10-22T09:10:13Z |
| Version | 0.159.1 |
| License | MIT |
| Generator | Sourcey 3.8.3 (markdown adapter) |
| Public API entries inventoried | **312** |
| Modules parsed | 48 |
| Classes | 98 |
| Public methods | 92 |
| Public functions | 90 |
| Upstream doc files ingested | 156 |
| Upstream example groups | 78 |

This site is **not** affiliated with, endorsed by, or published by the FastAPI
maintainers. Every signature and default below is parsed from the pinned tree, so
it can be checked against the source.


## Top-level exports {#top-level-exports}


`fastapi/__init__.py` re-exports 20 public names:

| Name | Module |
|---|---|
| APIRouter | fastapi.routing |
| BackgroundTasks | fastapi.background |
| Body | fastapi.param_functions |
| Cookie | fastapi.param_functions |
| Depends | fastapi.param_functions |
| FastAPI | fastapi.applications |
| File | fastapi.param_functions |
| Form | fastapi.param_functions |
| HTTPException | fastapi.exceptions |
| Header | fastapi.param_functions |
| Path | fastapi.param_functions |
| Query | fastapi.param_functions |
| Request | fastapi.requests |
| Response | fastapi.responses |
| Security | fastapi.param_functions |
| UploadFile | fastapi.datastructures |
| WebSocket | fastapi.websockets |
| WebSocketDisconnect | fastapi.websockets |
| WebSocketException | fastapi.exceptions |
| status | fastapi.starlette |


## Where to go next {#where-to-go-next}


- [Getting started](https://asporeteam.github.io/sourcey-docs-fastapi/docs/getting-started/index.md) — install and first application
- [Application class](https://asporeteam.github.io/sourcey-docs-fastapi/docs/reference/classes/index.md) — `FastAPI`, `APIRouter` and friends
- [Routing](https://asporeteam.github.io/sourcey-docs-fastapi/docs/reference/routing/index.md) — HTTP method decorators and route configuration
- [Parameters](https://asporeteam.github.io/sourcey-docs-fastapi/docs/reference/parameters/index.md) — `Depends`, `Query`, `Path`, `Body`, `Header`, `Cookie`, `Form`, `File`
- [Responses](https://asporeteam.github.io/sourcey-docs-fastapi/docs/reference/responses/index.md) — the response class family
- [Exceptions](https://asporeteam.github.io/sourcey-docs-fastapi/docs/reference/exceptions/index.md) — `HTTPException` and friends
- [Configuration](https://asporeteam.github.io/sourcey-docs-fastapi/docs/reference/config/index.md) — every `FastAPI(...)` constructor argument
- [Upstream documentation](https://asporeteam.github.io/sourcey-docs-fastapi/docs/upstream/index/index.md) — the pinned upstream docs tree, ingested verbatim
- [Upstream examples](https://asporeteam.github.io/sourcey-docs-fastapi/docs/upstream/examples/index.md) — the pinned `docs_src` example groups
- [Provenance](https://asporeteam.github.io/sourcey-docs-fastapi/docs/provenance/index.md) — how every byte on this site was produced