name: agent-browser
description: Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, test web applications, or extract information from web pages.

Browser Automation with agent-browser

Installation

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

Quick Start

agent-browser open <url>        # Navigate to page
agent-browser snapshot -i       # Get interactive elements with refs
agent-browser click @e1         # Click element by ref
agent-browser fill @e2 "text"   # Fill input by ref
agent-browser close             # Close browser

Core Workflow

1. Navigate: agent-browser open <url>
2. Snapshot: agent-browser snapshot -i (returns elements with refs like @e1, @e2)
3. Interact using refs from the snapshot
4. Re-snapshot after navigation or significant DOM changes

Commands

Navigation

agent-browser open <url>      # Navigate to URL (aliases: goto, navigate)
agent-browser back            # Go back
agent-browser forward         # Go forward
agent-browser reload          # Reload page
agent-browser close           # Close browser (aliases: quit, exit)

Snapshot (Page Analysis)

agent-browser snapshot        # Full accessibility tree
agent-browser snapshot -i     # Interactive elements only (recommended)
agent-browser snapshot -c     # Compact output
agent-browser snapshot -d 3   # Limit depth to 3
agent-browser snapshot -s "#main"  # Scope to selector

Interactions (use @refs from snapshot)

agent-browser click @e1           # Click
agent-browser dblclick @e1        # Double-click
agent-browser fill @e2 "text"     # Clear and type
agent-browser type @e2 "text"     # Type without clearing
agent-browser press Enter         # Press key (alias: key)
agent-browser press Control+a     # Key combination
agent-browser keydown Shift       # Hold key down
agent-browser keyup Shift         # Release key
agent-browser hover @e1           # Hover
agent-browser focus @e1           # Focus element
agent-browser check @e1           # Check checkbox
agent-browser uncheck @e1         # Uncheck checkbox
agent-browser select @e1 "value"  # Select dropdown
agent-browser scroll down 500     # Scroll page
agent-browser scrollintoview @e1  # Scroll element into view (alias: scrollinto)
agent-browser drag @e1 @e2        # Drag and drop
agent-browser upload @e1 file.pdf # Upload files

Get Information

agent-browser get text @e1        # Get element text
agent-browser get html @e1        # Get innerHTML
agent-browser get value @e1       # Get input value
agent-browser get attr @e1 href   # Get attribute
agent-browser get title           # Get page title
agent-browser get url             # Get current URL
agent-browser get count ".item"   # Count matching elements
agent-browser get box @e1         # Get bounding box

Check State

agent-browser is visible @e1      # Check if visible
agent-browser is enabled @e1      # Check if enabled
agent-browser is checked @e1      # Check if checked

Screenshots

agent-browser screenshot          # Screenshot to temp file
agent-browser screenshot path.png # Save to file
agent-browser screenshot --full   # Full page
agent-browser screenshot @e1      # Screenshot specific element

Wait

agent-browser wait @e1                     # Wait for element
agent-browser wait 2000                    # Wait milliseconds
agent-browser wait --text "Success"        # Wait for text
agent-browser wait --url "**/dashboard"    # Wait for URL pattern
agent-browser wait --load networkidle      # Wait for network idle
agent-browser wait --fn "window.ready === true"  # Wait for JS condition

Semantic Locators (alternative to refs)

agent-browser find role button click --name "Submit"
agent-browser find text "Sign In" click
agent-browser find label "Email" fill "[email protected]"
agent-browser find placeholder "Search..." fill "query"
agent-browser find first ".item" click
agent-browser find nth 2 "a" text

Actions: click, fill, check, hover, text

Mouse Control

agent-browser mouse move 100 200     # Move mouse
agent-browser mouse down left        # Press button (left/right/middle)
agent-browser mouse up left          # Release button
agent-browser mouse wheel 100        # Scroll wheel

Tabs & Windows

agent-browser tab                 # List tabs
agent-browser tab new [url]       # New tab
agent-browser tab 2               # Switch to tab 2
agent-browser tab close [n]       # Close tab
agent-browser window new          # New window

Frames

agent-browser frame "#iframe"     # Switch to iframe
agent-browser frame main          # Back to main frame

Dialogs

agent-browser dialog accept [text]   # Accept (with optional prompt text)
agent-browser dialog dismiss         # Dismiss

Cookies & Storage

agent-browser cookies                    # Get all cookies
agent-browser cookies set name value     # Set cookie
agent-browser cookies clear              # Clear cookies

agent-browser storage local              # Get all localStorage
agent-browser storage local key          # Get specific key
agent-browser storage local set k v      # Set value
agent-browser storage local clear        # Clear all

agent-browser storage session            # Same for sessionStorage

Network

agent-browser network route <url>              # Intercept requests
agent-browser network route <url> --abort      # Block requests
agent-browser network route <url> --body <json>  # Mock response
agent-browser network unroute [url]            # Remove routes
agent-browser network requests                 # View tracked requests
agent-browser network requests --filter api    # Filter requests

Browser Settings

agent-browser set viewport 1920 1080      # Set viewport size
agent-browser set device "iPhone 14"      # Emulate device
agent-browser set geo 40.7128 -74.0060    # Set geolocation
agent-browser set offline on              # Toggle offline mode
agent-browser set headers '{"X-Custom": "value"}'  # Extra HTTP headers
agent-browser set credentials user pass   # HTTP basic auth
agent-browser set media dark              # Emulate color scheme

Debug

agent-browser --headed open example.com   # Show browser window
agent-browser console                     # View console messages
agent-browser console --clear             # Clear console
agent-browser errors                      # View page errors
agent-browser errors --clear              # Clear errors
agent-browser highlight @e1               # Highlight element
agent-browser trace start [path]          # Start recording trace
agent-browser trace stop [path]           # Stop and save trace
agent-browser eval "document.title"       # Run JavaScript

State Management

agent-browser state save auth.json        # Save auth state
agent-browser state load auth.json        # Load auth state

Sessions (Parallel Browsers)

agent-browser --session test1 open site-a.com
agent-browser --session test2 open site-b.com
agent-browser session list
agent-browser session                     # Show current session

Each session has its own browser instance, cookies, storage, and auth state.

Persistent Profiles

Persist browser state across restarts:

agent-browser --profile ~/.myapp-profile open myapp.com
# Or via env: AGENT_BROWSER_PROFILE=~/.myapp-profile

JSON Output (for parsing)

Add --json for machine-readable output:

agent-browser snapshot -i --json
agent-browser get text @e1 --json
agent-browser is visible @e1 --json

CDP Mode (Connect to Existing Browser)

# Start Chrome with: google-chrome --remote-debugging-port=9222

# Connect once, then run commands
agent-browser connect 9222
agent-browser snapshot
agent-browser close

# Or pass --cdp on each command
agent-browser --cdp 9222 snapshot

# Connect via WebSocket URL
agent-browser --cdp "wss://your-browser-service.com/cdp?token=..." snapshot

Control User's Real Browser via Playwriter

Connect to user's actual Chrome browser using the Playwriter extension.

Setup (one-time)

1. User installs Playwriter extension
2. User starts the relay: bunx playwriter (starts CDP relay automatically)
3. User clicks Playwriter icon on tabs to control (icon turns green)

Usage

agent-browser --cdp 19988 snapshot -i
agent-browser --cdp 19988 fill @e5 "search query"
agent-browser --cdp 19988 click @e3

Authenticated Sessions

Use --headers to set HTTP headers scoped to an origin:

agent-browser open api.example.com --headers '{"Authorization": "Bearer <token>"}'

Headers are scoped to the origin only (safe for navigating to other domains).

Options

Cloud Browser Providers

Browserbase

export BROWSERBASE_API_KEY="your-api-key"
export BROWSERBASE_PROJECT_ID="your-project-id"
agent-browser -p browserbase open https://example.com

Browser Use

export BROWSER_USE_API_KEY="your-api-key"
agent-browser -p browseruse open https://example.com

Kernel

export KERNEL_API_KEY="your-api-key"
agent-browser -p kernel open https://example.com

Optional: KERNEL_HEADLESS, KERNEL_STEALTH, KERNEL_TIMEOUT_SECONDS, KERNEL_PROFILE_NAME

Streaming (Browser Preview)

Stream viewport via WebSocket for live preview:

AGENT_BROWSER_STREAM_PORT=9223 agent-browser open example.com

Connect to ws://localhost:9223 to receive frames and send input events.

Example: Form Submission

agent-browser open https://example.com/form
agent-browser snapshot -i
# Output: textbox "Email" [ref=e1], textbox "Password" [ref=e2], button "Submit" [ref=e3]

agent-browser fill @e1 "[email protected]"
agent-browser fill @e2 "password123"
agent-browser click @e3
agent-browser wait --load networkidle
agent-browser snapshot -i  # Check result

Example: Authentication with Saved State

# Login once
agent-browser open https://app.example.com/login
agent-browser snapshot -i
agent-browser fill @e1 "username"
agent-browser fill @e2 "password"
agent-browser click @e3
agent-browser wait --url "**/dashboard"
agent-browser state save auth.json

# Later sessions
agent-browser state load auth.json
agent-browser open https://app.example.com/dashboard