---
title: Multi-factor Authentication (MFA) for browser monitors
description: Multi-factor Authentication (MFA) adds an essential layer of security to applications login processes, protecting against unauthorized access. A very...
url: https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/5399/solutions/observability/synthetics/mfa-for-browser-monitors
products:
  - Elastic Cloud Serverless
  - Elastic Observability
applies_to:
  - Elastic Cloud Serverless: Generally available
  - Elastic Stack: Generally available
---

# Multi-factor Authentication (MFA) for browser monitors
Multi-factor Authentication (MFA) adds an essential layer of security to applications login processes, protecting against unauthorized access. A very common use case in Synthetics is testing user journeys involving websites protected by MFA.
Synthetics supports testing websites secured by Time-based One-Time Password (TOTP), a common MFA method that provides short-lived one-time tokens to enhance security.

## Configuring TOTP for MFA

To test a browser journey that uses TOTP for MFA, first configure the Synthetics authenticator token in the target application. To do this, generate a One-Time Password (OTP) using the Synthetics CLI; refer to [`@elastic/synthetics totp <secret>`](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/5399/solutions/observability/synthetics/cli).
```sh
npx @elastic/synthetics totp <secret>

// prints
OTP Token: 123456
```


## Applying the TOTP Token in Browser Journeys

Once the Synthetics TOTP Authentication is configured in your application, you can now use the OTP token in the synthetics browser journeys using the `mfa` object imported from `@elastic/synthetics`.
```ts
import { journey, step, mfa} from '@elastic/synthetics';

journey('MFA Test', ({ page, params }) => {
  step('Login using TOTP token', async () => {
    // login using username and pass and go to 2FA in next page
    const token = mfa.totp(params.MFA_SECRET);
    await page.getByPlaceholder("token-input").fill(token)
  });
});
```

For monitors created in the Synthetics UI using the Script editor, the `mfa` object can be accessed as shown below:
```ts
step('Login using 2FA', async () => {
  const token = mfa.totp(params.MFA_SECRET);
  await page.getByPlaceholder("token-input").fill(token)
});
```

<note>
  `params.MFA_SECRET` would be the encoded secret that was used for registering the Synthetics Authentication in your web application.
</note>