## Get a browser session ID.

`client.browserRendering.devtools.browser.create(BrowserCreateParamsparams, RequestOptionsoptions?): BrowserCreateResponse`

**post** `/accounts/{account_id}/browser-rendering/devtools/browser`

Acquires a browser and returns its session ID and websocket URL. Optionally accepts a JSON body with session guardrails to restrict outbound HTTP/S traffic.

### Parameters

- `params: BrowserCreateParams`

  - `account_id: string`

    Path param: Account ID.

  - `keep_alive?: number`

    Query param: Keep-alive time in milliseconds.

  - `lab?: boolean`

    Query param: Use experimental browser.

  - `liveViewUrlExpiresInMs?: number`

    Query param: How long the live view URL remains valid, in milliseconds (max 60 minutes). Only used when targets is true.

  - `recording?: boolean`

    Query param

  - `targets?: boolean`

    Query param: Include browser targets in response.

  - `guardrails?: Guardrails`

    Body param

    - `allowedDomains?: Array<string>`

      Hostname patterns, max 50. Supports exact hosts (example.com) or a single * wildcard anywhere. Prefer *.example.com (subdomain wildcard) over *example.com (prefix wildcard) to avoid matching overbroad lookalikes like evilexample.com.

    - `allowedDomainSets?: Array<string>`

      Max 4 entries: curated preset names (common-cdns) and/or https URLs of newline-separated hostname lists.

### Returns

- `BrowserCreateResponse`

  - `sessionId: string`

    Browser session ID.

  - `webSocketDebuggerUrl?: string`

    WebSocket URL for the session.

### Example

```typescript
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiToken: process.env['CLOUDFLARE_API_TOKEN'], // This is the default and can be omitted
});

const browser = await client.browserRendering.devtools.browser.create({ account_id: 'account_id' });

console.log(browser.sessionId);
```

#### Response

```json
{
  "sessionId": "sessionId",
  "webSocketDebuggerUrl": "webSocketDebuggerUrl"
}
```