---
title: "How to handle NTLM authentication"
slug: "how-to-handle-ntlm-authentication"
updated: 2025-11-25T06:28:02Z
published: 2025-11-25T06:28:02Z
canonical: "helpcenter.autify.com/how-to-handle-ntlm-authentication"
---

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

# How to handle NTLM authentication

This page explains how to handle testing on websites that use NTLM (New Technology LAN Manager) authentication.

## Configuration (Playwright Code Step)

To handle NTLM authentication, add a Playwright code step to the beginning of your scenario to configure the automatic provision of credentials via the Chrome DevTools Protocol (CDP).

Please add the following code as a Playwright code step:

```typescript
const username = "username"
const password = "password"

const cdp = await context.newCDPSession(page)

cdp.on("Fetch.requestPaused", ({ requestId }) =>
  cdp.send("Fetch.continueRequest", { requestId })
)
cdp.on("Fetch.authRequired", ({ requestId }) => {
  cdp.send("Fetch.continueWithAuth", {
    requestId,
    authChallengeResponse: {
      response: "ProvideCredentials",
      username,
      password
    }
  })
})
await cdp.send("Fetch.enable", { handleAuthRequests: true })
```

Please replace `username` and `password` on the first and second lines of the code with the actual username and password specified by the customer.

## Notes and Limitations

> **If the username contains a backslash ()** (e.g., `DOMAIN\user`), it must be escaped in the code by writing `\\` (two backslashes).
> 
> (Example: `const username = "DOMAIN\\user"` )

- **Credential Scope:** The username and password set in this code step will be automatically used for all NTLM authentication prompts that occur during this scenario execution.