Arcjet helps developers protect their apps in just a few lines of code. Bot detection. Rate limiting. Email validation. Attack protection. Data redaction. A developer-first approach to security.

This is an example FastAPI application demonstrating how to protect a website from abuse.

• Bot protection shows how the site can be protected from automated clients.
• Rate limiting shows a rate limit configuration that limits the number of requests from a single IP.
• Attack protection demonstrates Arcjet Shield, which detects suspicious behavior, such as SQL injection and cross-site scripting attacks.

1. Register for a free Arcjet account.

2. Install dependencies:

uv sync

3. Rename .env.example to .env and add your Arcjet key.

4. Start the dev server

uv run --env-file .env fastapi dev

5. Open http://localhost:8000/docs in your browser. You will be able to interact with the example routes directly from the OpenAPI docs.

• App: FastAPI
• Security: Arcjet

Check out the docs, contact support, or join our Discord server.

All development for Arcjet examples is done in the arcjet/examples repository.

You are welcome to open an issue here or in arcjet/examples directly. However, please direct all pull requests to arcjet/examples. Take a look at our contributing guide for more information.