Somebody reached our site last week by typing “can ai agents login to websites” into Google, which was a little embarrassing, because we have written about logins roughly thirty times on this blog and never answered that question directly. Yes, AI agents can log in to websites. The way they do it varies a lot, though, and the method decides who ends up holding your password, where your logged-in session lives afterward, and how often you get dragged back in to type a 2FA code.

How AI agents log in to websites, in practice

Almost every product out there does one of three things.

  1. You hand it your password. The agent stores your username and password (or pulls them from a password manager) and types them into a browser it controls. Plenty of DIY setups built on Playwright or Browser Use work this way, and so do a lot of hosted agent platforms.
  2. You log in inside its browser. The agent runs a browser on the vendor’s servers, and when it hits a sign-in page it pauses and lets you take the wheel. OpenAI’s ChatGPT Work agent does this.
  3. It uses the logins you already have. The agent runs inside the browser you already use, so it sees the same signed-in Gmail, CRM and ad accounts you do, and when it lands on a login page, Chrome’s password manager fills in the form for it the same way it does for you. That’s how dassi works. (Anthropic’s Claude in Chrome also acts in your own browser.)

They look identical in a demo, which is part of the problem.

The password handoff is the one I’d skip

A password in an agent’s config file is a password sitting somewhere you don’t control, copied out of the vault you picked precisely so it wouldn’t get copied around, and now living wherever that agent vendor keeps its secrets. The password manager companies noticed early. In October 2025, 1Password and Browserbase announced Secure Agentic Autofill: the agent asks for a login, you approve the request in 1Password, and the credential gets injected straight into the form without the model ever seeing it. It’s good engineering, and it fixes the password half of the problem while leaving the session half alone: you still end up with a logged-in browser on someone else’s server, doing things as you while you’re somewhere else, and your approval covered the moment of signing in rather than the next forty minutes of clicking.

Signing in yourself, on their computer

It’s the best of the cloud options, and it still leaves a copy of you on their side.

OpenAI’s version is typical. The agent runs in a cloud browser, stops at the sign-in page, and you take over to type the password yourself, so the model never handles it. And when the OpenAI Developers account announced this in July, the selling point was that “your login persists across sessions, so you only have to sign in once,” which is convenient and also means the session is stored somewhere, in this case inside a browser OpenAI runs.

I wouldn’t lose sleep over that for a newsletter tool. Payroll is another matter, and so is the ad account that spends your company’s money.

Data-center IPs look like bots because they usually are

Cloud browsers sign in from data-center IPs, which is exactly what bot detection hunts for. So you get the CAPTCHA, the “new sign-in from Virginia” email, and sometimes a locked account. More on that here.

dassi works on sites you’re signed into, and signs in when you’re not

That’s the third option, and it’s the one we built dassi around. If you’re signed in to HubSpot, Shopify, Gmail or your Google Ads account in Chrome right now, dassi can work in those tabs right now. No password to hand over, no connector, no API key, no second login.

And when you aren’t signed in, dassi signs in the way you would. It opens the login page, lets Chrome’s password manager (or whatever already autofills your login forms) fill in the saved username and password, and clicks Sign in. Same thing if a session expires halfway through a task. Your passwords stay saved in the password manager where they already live, and it does the filling, so you never paste one into a chat or into dassi’s settings. If the site then asks for a 2FA code, that step stays yours: you tap your phone like always and tell dassi to carry on.

It sidesteps most of the mess above because an agent working inside your own browser inherits the sessions you already have. You signed into Salesforce this morning, on your laptop, with your 2FA, over your home Wi-Fi. Your agent reads that same tab. So there’s no second copy of your session sitting on a vendor’s machine, and the site sees what it always sees, which is you on your usual device.

The agent itself runs locally on your machine instead of in our cloud. You pick the model it thinks with (a hosted provider like OpenAI or Anthropic, in which case your prompts go to them, or a local model if you’d rather keep everything on the laptop). And you approve actions before they happen, because a logged-in agent shouldn’t quietly become an unsupervised one.

The catch: your computer has to be on. A cloud agent can grind through a task at 3 a.m. while your laptop sleeps, and a local one can’t, since it lives where your sessions live. I’d take that deal for anything touching money, customers or email. For scraping ten thousand public product pages, where nobody needs to be signed in, a cloud browser is perfectly fine and I wouldn’t bother fighting it. If you want the longer architectural version, how AI agents connect to your browser walks through what each setup costs.

What I’d check before letting any agent near my accounts

Three things, and none of them are about the model. I want to know where the session lives once I’ve signed in, whether I had to hand my password to anyone to get there, and whether I approve what the agent does after login or only the login. And most vendor docs bury the first answer somewhere near the bottom of a security page, which tells you something.

If you’d like to see it work on the accounts you’re already signed into, dassi is on the Chrome Web Store. Free credits to try dassi, good for 7 days. No card required.

I suspect the login question gets stranger from here. Sites are starting to ask agents to identify themselves (Cloudflare’s signed-agents work is one early version of that), and sooner or later your bank will want to know whether it’s talking to you or to something acting as you. I don’t know how that plays out for agents working inside your own session, which look exactly like you because they are in your session. My guess is the banks find a way to ask anyway, and we all get one more checkbox to click before breakfast.