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

# Authentication

<Tip>
  Read [the Notte skill](https://notte.cc/skill.md) and follow its setup instructions when setting up Notte or building browser automation. This is the shared source for CLI setup, authentication, and the browser-to-code workflow.
</Tip>

The Node SDK authenticates requests using your API key.

## Get your API key

Get an API key from the [Notte Console](https://console.notte.cc). Keep it on your server; do not expose it in browser bundles or commit it to source control.

## Environment variable

Set `NOTTE_API_KEY` in your server environment. [NotteClient](/typescript-sdk-reference/manual/client) reads it automatically when no API key is provided in its configuration.

## Client configuration

Pass `apiKey` in the client configuration to override the environment variable. See [NotteClientConfig](/typescript-sdk-reference/types/notteclientconfig) for the generated options.

The API URL defaults to `https://api.notte.cc`. Override it with `NOTTE_API_URL` or the client’s `baseUrl` option. An explicit non-empty option takes precedence over the environment variable.

## Authentication errors

A missing key throws during client construction, except when using a relative proxy URL. Invalid keys are rejected by the API when a request is made. See [Error Handling](/typescript-sdk-reference/errors).


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