FastAPI - Upstash Documentation

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.

GitHub Repository

You can find the project source code on GitHub.

Environment Setup

Install FastAPI and upstash-redis.

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

Database Setup

Create a Redis database using Upstash Console or Upstash CLI and export the UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN to your environment.

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

API Setup

Create main.py:

main.py

from fastapi import FastAPIfrom upstash_redis import Redisapp = 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/