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

# Authentication

> Authenticate requests with an API key.

Create API keys in [Arcade Studio](https://studio.arcade.ai/settings/api-keys) under **Settings → API keys**. Send the key as a bearer token:

```bash theme={null}
Authorization: Bearer $ARCADE_API_KEY
```

A key has the same access as your account. Keep keys secret: never commit them or expose them in client-side code.

Requests with a missing, invalid, expired or revoked key fail with `401`. A revoked key stops working immediately.

Keys belong to one environment. Use a key from [staging Studio](https://staging-studio.arcade.ai/settings/api-keys) with `staging-platform.arcade.ai`; a key from the other environment fails with `401`.