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

# Browserbase

> Run Libretto sessions on Browserbase's managed browser infrastructure.

Browserbase is a managed browser provider. Use it when you want Libretto's local CLI and workflow runtime, but want Browserbase to host the browser session.

## Configure Browserbase

Create a Browserbase API key and project, then add both values to the repo root `.env` file. Libretto loads `.env` automatically before running CLI commands.

```dotenv theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
# inside .env
BROWSERBASE_API_KEY=<browserbase-api-key>
BROWSERBASE_PROJECT_ID=<browserbase-project-id>
```

`BROWSERBASE_ENDPOINT` is only needed if Browserbase gives you a custom API endpoint.

Then set Browserbase as the workspace's default browser provider in `.libretto/config.json`:

```json theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
{
  "version": 1,
  "provider": "browserbase"
}
```

You can also use `--provider browserbase` on a single command instead of changing the config file.

## Open a session

Open a page with the configured Browserbase provider:

```bash theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
npx libretto open https://example.com --session browserbase-demo
```

If you did not set `provider` in `.libretto/config.json`, pass it for this command instead:

```bash theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
npx libretto open https://example.com --provider browserbase --session browserbase-demo
```

After the session is open, use the normal Libretto commands:

```bash theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
npx libretto snapshot --session browserbase-demo
npx libretto exec --session browserbase-demo "await page.title()"
npx libretto close --session browserbase-demo
```

## Run a workflow

Run workflows normally when `provider` is set in `.libretto/config.json`:

```bash theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
npx libretto run ./workflow.ts --headless
```

Or pass the provider for a single run:

```bash theme={null} theme={"theme":{"light":"github-light","dark":"github-dark"}}
npx libretto run ./workflow.ts --provider browserbase --headless
```

The workflow code does not need to change. Libretto creates the Browserbase browser session, connects to it over CDP, runs the workflow, and releases the provider session when the run finishes.

## When to use Browserbase

Choose Browserbase when you want a managed browser runtime and already use Browserbase for browser sessions. If you need to own the container runtime, scheduler, network, and secrets layer yourself, use [GCP](/alternative-providers/gcp) or [AWS](/alternative-providers/aws) instead.