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Browser Harness

Developer tool

by Browser Use

Browser Harness lets coding agents click, type and read pages in a browser.

Find alternatives to Browser Harness

What it does

• Computer use

Features 5

• Your own ChromeWorks in the Chrome you already use, with your tabs, cookies and logins, after a one-time permission.
• Self-writing helpersWhen a needed tool is missing the agent writes a helper for the site and keeps it for next time.
• Browser Use CLIThe browser-use command is built on Browser Harness and gives an agent your browser from a shell command.
• Tab markerThe tab the agent controls gets a marker at the start of its title and works in the background.
• Cloud browsersCan run on Browser Use cloud browsers with stealth, CAPTCHA solving and proxies when your laptop is closed.

Sources

Pricing

Official documentation · 15 Oct 2026

"local Chrome is free"

Description

Official documentation · 15 Oct 2026

"clicks, types and reads pages"

What it does

Official documentation · 15 Oct 2026

"Direct browser control for coding agents."

Sold within

Official documentation · 15 Oct 2026

"Browser Harness is the standalone open-source repo."

Name

Official documentation · 15 Oct 2026

"Browser Harness is open source"

URL

Official documentation · 15 Oct 2026

"Browser Harness is open source"

Deployment

Official documentation · 15 Oct 2026

"The default local flow attaches to your running Chrome or Chromium through CDP."

Interfaces

Official documentation · 18 Oct 2026

Page: 'The Browser Use CLI (the browser-use command) is built on Browser Harness'.

Also from Browser Use

• Browser Use Agents AI agent

  Hosted web agent, called through Browser Use's cloud API, that takes a task in plain language and carries it out in a remote browser.

• Browser Infrastructure Infrastructure service

  Remote cloud browsers, with stealth, CAPTCHA solving and proxies, that developers rent by the hour to run their own AI agents against the live web.

• Browser Use (open-source library) Agent platform

  MIT-licensed Python library developers use to build agents that control a web browser, run on their own machines with a model of their choice. The same team publishes Browser Harness, a separate open-source tool that gives coding agents such as Claude Code and Cursor a browser.

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