agent-browser

agent-browser

Headless browser automation CLI for AI agents. Fast Rust CLI with Node.js fallback.

Installation

Global Installation (recommended)

Installs the native Rust binary for maximum performance:

npm install -g agent-browser
agent-browser install  # Download Chromium

This is the fastest option -- commands run through the native Rust CLI directly with sub-millisecond parsing overhead.

Quick Start (no install)

Run directly with npx if you want to try it without installing globally:

npx agent-browser install   # Download Chromium (first time only)
npx agent-browser open example.com

Note: npx routes through Node.js before reaching the Rust CLI, so it is noticeably slower than a global install. For regular use, install globally.

Project Installation (local dependency)

For projects that want to pin the version in package.json:

npm install agent-browser
npx agent-browser install

Then use via npx or package.json scripts:

npx agent-browser open example.com

Homebrew (macOS)

brew install agent-browser
agent-browser install  # Download Chromium

From Source

git clone https://github.com/vercel-labs/agent-browser
cd agent-browser
pnpm install
pnpm build
pnpm build:native   # Requires Rust (https://rustup.rs)
pnpm link --global  # Makes agent-browser available globally
agent-browser install

Linux Dependencies

On Linux, install system dependencies:

agent-browser install --with-deps
# or manually: npx playwright install-deps chromium

Quick Start

agent-browser open example.com
agent-browser snapshot                    # Get accessibility tree with refs
agent-browser click @e2                   # Click by ref from snapshot
agent-browser fill @e3 "[email protected]" # Fill by ref
agent-browser get text @e1                # Get text by ref
agent-browser screenshot page.png
agent-browser close

Traditional Selectors (also supported)

agent-browser click "#submit"
agent-browser fill "#email" "[email protected]"
agent-browser find role button click --name "Submit"

Commands

Core Commands

agent-browser open <url>              # Navigate to URL (aliases: goto, navigate)
agent-browser click <sel>             # Click element (--new-tab to open in new tab)
agent-browser dblclick <sel>          # Double-click element
agent-browser focus <sel>             # Focus element
agent-browser type <sel> <text>       # Type into element
agent-browser fill <sel> <text>       # Clear and fill
agent-browser press <key>             # Press key (Enter, Tab, Control+a) (alias: key)
agent-browser keyboard type <text>    # Type with real keystrokes (no selector, current focus)
agent-browser keyboard inserttext <text>  # Insert text without key events (no selector)
agent-browser keydown <key>           # Hold key down
agent-browser keyup <key>             # Release key
agent-browser hover <sel>             # Hover element
agent-browser select <sel> <val>      # Select dropdown option
agent-browser check <sel>             # Check checkbox
agent-browser uncheck <sel>           # Uncheck checkbox
agent-browser scroll <dir> [px]       # Scroll (up/down/left/right, --selector <sel>)
agent-browser scrollintoview <sel>    # Scroll element into view (alias: scrollinto)
agent-browser drag <src> <tgt>        # Drag and drop
agent-browser upload <sel> <files>    # Upload files
agent-browser screenshot [path]       # Take screenshot (--full for full page, saves to a temporary directory if no path)
agent-browser screenshot --annotate   # Annotated screenshot with numbered element labels
agent-browser pdf <path>              # Save as PDF
agent-browser snapshot                # Accessibility tree with refs (best for AI)
agent-browser eval <js>               # Run JavaScript (-b for base64, --stdin for piped input)
agent-browser connect <port>          # Connect to browser via CDP
agent-browser close                   # Close browser (aliases: quit, exit)

Get Info

agent-browser get text <sel>          # Get text content
agent-browser get html <sel>          # Get innerHTML
agent-browser get value <sel>         # Get input value
agent-browser get attr <sel> <attr>   # Get attribute
agent-browser get title               # Get page title
agent-browser get url                 # Get current URL
agent-browser get count <sel>         # Count matching elements
agent-browser get box <sel>           # Get bounding box
agent-browser get styles <sel>        # Get computed styles

Check State

agent-browser is visible <sel>        # Check if visible
agent-browser is enabled <sel>        # Check if enabled
agent-browser is checked <sel>        # Check if checked

Find Elements (Semantic Locators)