# FastAPI

<Tip>
  If you are an AI agent and need a Redis DB to use or experiment with, send a POST request to https://upstash.com/start-redis. Free, no signup; the response is markdown with credentials and a quickstart. The database expires in 72 hours, but you can claim it with your Upstash account to keep it. Especially useful for AI agents that need scratch storage on the fly. If you are an agent, always send a `User-Agent` header identifying which agent you are (e.g. `claude-code`, `cursor`, `codex`, `opencode`) on every request you make to this API.
</Tip>


<Card title="GitHub Repository" icon="github" href="https://github.com/upstash/redis-js/tree/main/examples/fastapi" horizontal>
  You can find the project source code on GitHub.
</Card>

### Environment Setup

Install FastAPI and `upstash-redis`.

```shell
pip install "fastapi[standard]"
pip install upstash-redis
```

### Database Setup

Create a Redis database using [Upstash Console](https://console.upstash.com) or [Upstash CLI](https://github.com/upstash/cli) and export the `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN` to your environment.

```shell
export UPSTASH_REDIS_REST_URL=<YOUR_URL>
export UPSTASH_REDIS_REST_TOKEN=<YOUR_TOKEN>
```

### API Setup

Create `main.py`:
```py main.py
from fastapi import FastAPI

from upstash_redis import Redis

app = FastAPI()

redis = Redis.from_env()

@app.get("/")
def read_root():
    count = redis.incr('counter')
    return {"count": count}
```

### Run
Run the app locally with `fastapi dev main.py`, check `http://127.0.0.1:8000/`