BE SURE TO CLEAN UP SCREEN SHOTS AFTER YOU ARE DONE WITH EVERYTHING

IF THIS NEEDS TO BE INSTALLED

npm install -g agent-browser
agent-browser install # to get chromium downloaded

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 "test@example.com" # 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" "test@example.com" 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 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 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) 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) agent-browser pdf <path> # Save as PDF agent-browser snapshot # Accessibility tree with refs (best for AI) agent-browser eval <js> # Run JavaScript 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

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)

agent-browser find role <role> <action> [value] # By ARIA role agent-browser find text <text> <action> # By text content agent-browser find label <label> <action> [value] # By label agent-browser find placeholder <ph> <action> [value] # By placeholder agent-browser find alt <text> <action> # By alt text agent-browser find title <text> <action> # By title attr agent-browser find testid <id> <action> [value] # By data-testid agent-browser find first <sel> <action> [value] # First match agent-browser find last <sel> <action> [value] # Last match agent-browser find nth <n> <sel> <action> [value] # Nth match

Actions: click, fill, check, hover, text

Examples:

agent-browser find role button click --name "Submit" agent-browser find text "Sign In" click agent-browser find label "Email" fill "test@test.com" agent-browser find first ".item" click agent-browser find nth 2 "a" text

Wait

agent-browser wait <selector> # Wait for element to be visible agent-browser wait <ms> # Wait for time (milliseconds) agent-browser wait --text "Welcome" # Wait for text to appear agent-browser wait --url "**/dash" # Wait for URL pattern agent-browser wait --load networkidle # Wait for load state agent-browser wait --fn "window.ready === true" # Wait for JS condition

Load states: load, domcontentloaded, networkidle Mouse Control

agent-browser mouse move <x> <y> # Move mouse agent-browser mouse down [button] # Press button (left/right/middle) agent-browser mouse up [button] # Release button agent-browser mouse wheel <dy> [dx] # Scroll wheel

Browser Settings

agent-browser set viewport <w> <h> # Set viewport size agent-browser set device <name> # Emulate device ("iPhone 14") agent-browser set geo <lat> <lng> # Set geolocation agent-browser set offline [on|off] # Toggle offline mode agent-browser set headers <json> # Extra HTTP headers agent-browser set credentials <u> <p> # HTTP basic auth agent-browser set media [dark|light] # Emulate color scheme

Cookies & Storage

agent-browser cookies # Get all cookies agent-browser cookies set <name> <val> # 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

Tabs & Windows

agent-browser tab # List tabs agent-browser tab new [url] # New tab (optionally with URL) agent-browser tab <n> # Switch to tab n agent-browser tab close [n] # Close tab agent-browser window new # New window

Frames

agent-browser frame <sel> # 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

Debug

agent-browser trace start [path] # Start recording trace agent-browser trace stop [path] # Stop and save trace 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 <sel> # Highlight element agent-browser state save <path> # Save auth state agent-browser state load <path> # Load auth state

Navigation

agent-browser back # Go back agent-browser forward # Go forward agent-browser reload # Reload page

Setup

agent-browser install # Download Chromium browser agent-browser install --with-deps # Also install system deps (Linux)

Sessions

Run multiple isolated browser instances:

agent-browser --session agent1 open site-a.com agent-browser --session agent2 open site-b.com

AGENT_BROWSER_SESSION=agent1 agent-browser click "#btn"

agent-browser session list

agent-browser session

Each session has its own:

Browser instance
Cookies and storage
Navigation history
Authentication state

Snapshot Options

The snapshot command supports filtering to reduce output size:

agent-browser snapshot # Full accessibility tree agent-browser snapshot -i # Interactive elements only (buttons, inputs, links) agent-browser snapshot -c # Compact (remove empty structural elements) agent-browser snapshot -d 3 # Limit depth to 3 levels agent-browser snapshot -s "#main" # Scope to CSS selector agent-browser snapshot -i -c -d 5 # Combine options

Option Description -i, --interactive Only show interactive elements (buttons, links, inputs) -c, --compact Remove empty structural elements -d, --depth <n> Limit tree depth -s, --selector <sel> Scope to CSS selector Options Option Description --session <name> Use isolated session (or AGENT_BROWSER_SESSION env) --headers <json> Set HTTP headers scoped to the URL's origin --executable-path <path> Custom browser executable (or AGENT_BROWSER_EXECUTABLE_PATH env) --json JSON output (for agents) --full, -f Full page screenshot --name, -n Locator name filter --exact Exact text match --headed Show browser window (not headless) --cdp <port> Connect via Chrome DevTools Protocol --debug Debug output Selectors Refs (Recommended for AI)

Refs provide deterministic element selection from snapshots:

agent-browser snapshot

agent-browser click @e2 # Click the button agent-browser fill @e3 "test@example.com" # Fill the textbox agent-browser get text @e1 # Get heading text agent-browser hover @e4 # Hover the link

Why use refs?

Deterministic: Ref points to exact element from snapshot
Fast: No DOM re-query needed
AI-friendly: Snapshot + ref workflow is optimal for LLMs

CSS Selectors

agent-browser click "#id" agent-browser click ".class" agent-browser click "div > button"

Text & XPath

agent-browser click "text=Submit" agent-browser click "xpath=//button"

Semantic Locators

agent-browser find role button click --name "Submit" agent-browser find label "Email" fill "test@test.com"

Agent Mode

Use --json for machine-readable output:

agent-browser snapshot --json

agent-browser get text @e1 --json agent-browser is visible @e2 --json

Optimal AI Workflow

agent-browser open example.com agent-browser snapshot -i --json # AI parses tree and refs

agent-browser click @e2 agent-browser fill @e3 "input text"

agent-browser snapshot -i --json

Headed Mode

Show the browser window for debugging:

agent-browser open example.com --headed

This opens a visible browser window instead of running headless. Authenticated Sessions

Use --headers to set HTTP headers for a specific origin, enabling authentication without login flows:

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

agent-browser snapshot -i --json agent-browser click @e2

agent-browser open other-site.com

This is useful for:

Skipping login flows - Authenticate via headers instead of UI
Switching users - Start new sessions with different auth tokens
API testing - Access protected endpoints directly
Security - Headers are scoped to the origin, not leaked to other domains

To set headers for multiple origins, use --headers with each open command:

agent-browser open api.example.com --headers '{"Authorization": "Bearer token1"}' agent-browser open api.acme.com --headers '{"Authorization": "Bearer token2"}'

For global headers (all domains), use set headers:

agent-browser set headers '{"X-Custom-Header": "value"}'

Custom Browser Executable

Use a custom browser executable instead of the bundled Chromium. This is useful for:

Serverless deployment: Use lightweight Chromium builds like @sparticuz/chromium (~50MB vs ~684MB)
System browsers: Use an existing Chrome/Chromium installation
Custom builds: Use modified browser builds

CLI Usage

agent-browser --executable-path /path/to/chromium open example.com

AGENT_BROWSER_EXECUTABLE_PATH=/path/to/chromium agent-browser open example.com

Serverless Example (Vercel/AWS Lambda)

import chromium from '@sparticuz/chromium'; import { BrowserManager } from 'agent-browser';

export async function handler() { const browser = new BrowserManager(); await browser.launch({ executablePath: await chromium.executablePath(), headless: true, }); // ... use browser }