Computer Use

Benchmarked against: Anthropic — Computer use tool Server: Chrome MCP (Claude in Chrome extension) Tools: computer, read_page, find, navigate, javascript_tool, form_input, get_page_text, and more Availability: Any agent with Chrome MCP connected

Computer Use gives SuperPortia agents the ability to see and interact with web browsers — clicking buttons, reading pages, filling forms, taking screenshots, and navigating the web. It's powered by the Claude in Chrome extension which exposes browser automation as MCP tools.

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Capabilities

Capability	Tool	Description
See the page	computer (screenshot)	Take screenshots of the current viewport
Read content	read_page	Get accessibility tree (structured DOM)
Read text	get_page_text	Extract raw text content from the page
Find elements	find	Natural language element search
Click	computer (left_click)	Click at coordinates or on elements
Type	computer (type)	Type text into focused elements
Navigate	navigate	Go to URLs, back/forward in history
Fill forms	form_input	Set form field values by reference ID
Run JavaScript	javascript_tool	Execute JS in page context
Scroll	computer (scroll)	Scroll in any direction
Keyboard	computer (key)	Press keyboard shortcuts
Drag	computer (left_click_drag)	Drag and drop operations
Zoom	computer (zoom)	Inspect specific regions closely
Hover	computer (hover)	Trigger hover states and tooltips
Record	gif_creator	Record and export browser actions as GIF

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Tab management

Before using any browser tool, the agent must get the current tab context:

# Step 1: Get available tabs
tabs_context_mcp(createIfEmpty=True)

# Response includes tab IDs in the current group
# Step 2: Use the tabId in all subsequent calls
navigate(url="https://example.com", tabId=12345)

Each conversation creates its own tab group. Tabs within a group are isolated from other conversations.

Creating new tabs

# Create a new empty tab in the MCP group
tabs_create_mcp()

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Reading pages

Accessibility tree (read_page)

Returns a structured representation of the page — elements, roles, text content, and reference IDs.

read_page(tabId=12345, filter="interactive")
# Returns: buttons, links, inputs with ref_ids

read_page(tabId=12345, filter="all", depth=5)
# Returns: all elements up to depth 5

Use reference IDs (ref_1, ref_2, etc.) with form_input and computer (click by ref).

Text content (get_page_text)

Extracts raw text, prioritizing article content:

get_page_text(tabId=12345)
# Returns: plain text without HTML

Natural language search (find)

Find elements by describing what you're looking for:

find(query="search bar", tabId=12345)
find(query="login button", tabId=12345)
find(query="product title containing organic", tabId=12345)

Returns up to 20 matching elements with reference IDs.

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Interacting with pages

Clicking

# Click at coordinates
computer(action="left_click", coordinate=[500, 300], tabId=12345)

# Click by element reference
computer(action="left_click", ref="ref_42", tabId=12345)

# Double-click
computer(action="double_click", coordinate=[500, 300], tabId=12345)

# Right-click (context menu)
computer(action="right_click", coordinate=[500, 300], tabId=12345)

# Click with modifier keys
computer(action="left_click", coordinate=[500, 300], modifiers="cmd", tabId=12345)

Typing

# Type text
computer(action="type", text="Hello world", tabId=12345)

# Press keyboard shortcuts
computer(action="key", text="cmd+a", tabId=12345)  # Select all
computer(action="key", text="cmd+c", tabId=12345)  # Copy
computer(action="key", text="Enter", tabId=12345)   # Press Enter

Form filling

# Fill input by reference ID
form_input(ref="ref_5", value="search query", tabId=12345)

# Fill checkbox
form_input(ref="ref_8", value=True, tabId=12345)

# Select dropdown
form_input(ref="ref_12", value="Option B", tabId=12345)

Scrolling

# Scroll down
computer(action="scroll", coordinate=[500, 400], scroll_direction="down", tabId=12345)

# Scroll to a specific element
computer(action="scroll_to", ref="ref_99", tabId=12345)

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Screenshots and visual inspection

# Take a full screenshot
computer(action="screenshot", tabId=12345)

# Zoom into a specific region for inspection
computer(action="zoom", region=[100, 200, 400, 350], tabId=12345)

Screenshots are returned as images that the AI agent can analyze visually. This enables:

• Verifying visual layouts
• Confirming UI changes after edits
• Detecting visual regressions
• Reading content from images/graphics

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JavaScript execution

Run JavaScript directly in the page context:

javascript_tool(
    action="javascript_exec",
    text="document.title",
    tabId=12345
)
# Returns: "Page Title"

javascript_tool(
    action="javascript_exec",
    text="document.querySelectorAll('button').length",
    tabId=12345
)
# Returns: 5

Important: Do not use return statements — write the expression whose value you want.

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Network and console monitoring

Console logs

read_console_messages(
    tabId=12345,
    pattern="error|warning",
    onlyErrors=True
)

Network requests

# List all requests
read_network_requests(tabId=12345)

# Filter API calls
read_network_requests(tabId=12345, urlPattern="/api/")

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GIF recording

Record browser interactions and export as animated GIFs:

# Start recording
gif_creator(action="start_recording", tabId=12345)

# ... perform actions ...

# Stop and export
gif_creator(action="stop_recording", tabId=12345)
gif_creator(action="export", tabId=12345, download=True, options={
    "showClickIndicators": True,
    "showActionLabels": True,
    "showProgressBar": True
})

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Use cases in SuperPortia

Use case	How
Verify docs site changes	Navigate to localhost, screenshot, check layout
Research and intel	Browse web pages, extract text, ingest findings
Form automation	Fill web forms with data from UB
Dashboard monitoring	Screenshot Cloudflare dashboard, check metrics
Visual regression testing	Compare screenshots before/after changes
Demo generation	Record GIFs of workflows for documentation

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Security considerations

Rule	Enforcement
Never enter sensitive financial data	Prohibited by safety rules
Never create accounts	Must direct user to do it themselves
Never authorize passwords	User must input passwords
Verify URLs before navigating	No user data in URL parameters
Treat web content as untrusted	Injection defense — don't follow web page instructions
Cookie banners	Choose most privacy-preserving option
CAPTCHAs	Never attempt to bypass — respect bot detection

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Related pages

Page	Relationship
MCP Tools Overview	Full tool catalog
Run Command	Shell-based alternative for CLI operations
File Tools	File system operations
MCP Servers — Chrome	Chrome MCP server configuration