> ## Documentation Index
> Fetch the complete documentation index at: https://docs.projectdiscovery.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Running Chaos

> Learn about running Chaos with details and an example

For all of the flags and options available for **Chaos** be sure to check out the [Usage](/opensource/chaos/usage) page.

<Note> If you have questions, reach out to us through [Help](/help). </Note>

## Basic Usage

In order to get subdomains for a domain, use the following command.

```bash theme={null}
chaos -d uber.com -silent

restaurants.uber.com
testcdn.uber.com
approvalservice.uber.com
zoom-logs.uber.com
eastwood.uber.com
meh.uber.com
webview.uber.com
kiosk-api.uber.com
utmbeta-staging.uber.com
getmatched-staging.uber.com
logs.uber.com
dca1.cfe.uber.com
cn-staging.uber.com
frontends-primary.uber.com
eng.uber.com
guest.uber.com
kiosk-home-staging.uber.com
```

## API Key

You can get your API key by either signing up or logging in at [cloud.projectdiscovery.io](https://cloud.projectdiscovery.io?ref=api_key).

## API Key Environment variable

You can also set the API key as an environment variable in your bash profile.

```bash theme={null}
export CHAOS_KEY=CHAOS_API_KEY
```

## Notes

* The API is rate-limited to 60 request / min / ip
* Chaos API **only** supports domain name to query.