Chrome DevTools MCP

Overview

This skill enables browser debugging and automation using Chrome DevTools through MCP. It provides access to Chrome DevTools features including page interaction, network analysis, console inspection, and performance tracing.

When to Use This Skill

• Debugging web page issues
• Analyzing network requests and responses
• Inspecting console messages and errors
• Performance profiling and tracing
• Automated page interaction and testing
• Taking screenshots and snapshots

Quick Start Workflow

1. List pages: list_pages
2. Select a page: select_page
3. Take snapshot: take_snapshot
4. Interact using uids from snapshot

Core Tools

Page Management

list_pages - Get all open pages

mcp__chrome-devtools__list_pages({})

select_page - Select a page for operations

mcp__chrome-devtools__select_page({ pageIdx: 0 })

new_page - Create a new page

mcp__chrome-devtools__new_page({ url: "https://example.com" })

close_page - Close a page

mcp__chrome-devtools__close_page({ pageIdx: 1 })

navigate_page - Navigate the selected page

mcp__chrome-devtools__navigate_page({ type: "url", url: "https://example.com" })
mcp__chrome-devtools__navigate_page({ type: "back" })
mcp__chrome-devtools__navigate_page({ type: "reload", ignoreCache: true })

Snapshots and Screenshots

take_snapshot - Get accessibility tree (preferred for interaction)

mcp__chrome-devtools__take_snapshot({})

take_screenshot - Capture visual screenshot

mcp__chrome-devtools__take_screenshot({
  format: "png",
  fullPage: true,
  filePath: "./screenshot.png"
})

Element Interaction

click - Click an element

mcp__chrome-devtools__click({ uid: "element-uid" })
mcp__chrome-devtools__click({ uid: "element-uid", dblClick: true })

fill - Fill input or select option

mcp__chrome-devtools__fill({ uid: "input-uid", value: "text" })

fill_form - Fill multiple form elements

mcp__chrome-devtools__fill_form({
  elements: [
    { uid: "username-uid", value: "user" },
    { uid: "password-uid", value: "pass" }
  ]
})

hover - Hover over an element

mcp__chrome-devtools__hover({ uid: "element-uid" })

drag - Drag and drop

mcp__chrome-devtools__drag({ from_uid: "source", to_uid: "target" })

Debugging Tools

list_console_messages - Get console messages

mcp__chrome-devtools__list_console_messages({})
mcp__chrome-devtools__list_console_messages({ types: ["error", "warn"] })

get_console_message - Get specific message details

mcp__chrome-devtools__get_console_message({ msgid: 1 })

list_network_requests - Get network requests

mcp__chrome-devtools__list_network_requests({})
mcp__chrome-devtools__list_network_requests({ resourceTypes: ["fetch", "xhr"] })

get_network_request - Get request details

mcp__chrome-devtools__get_network_request({ reqid: 1 })

Performance Tools

performance_start_trace - Start performance trace

mcp__chrome-devtools__performance_start_trace({
  reload: true,
  autoStop: true
})

performance_stop_trace - Stop performance trace

mcp__chrome-devtools__performance_stop_trace({})

performance_analyze_insight - Analyze performance insight

mcp__chrome-devtools__performance_analyze_insight({
  insightSetId: "insight-set-id",
  insightName: "LCPBreakdown"
})

Advanced Tools

evaluate_script - Execute JavaScript

mcp__chrome-devtools__evaluate_script({
  function: "() => document.title"
})

press_key - Press keyboard key

mcp__chrome-devtools__press_key({ key: "Enter" })
mcp__chrome-devtools__press_key({ key: "Control+A" })

emulate - Emulate conditions

mcp__chrome-devtools__emulate({
  networkConditions: "Slow 3G",
  cpuThrottlingRate: 4
})

handle_dialog - Handle browser dialog

mcp__chrome-devtools__handle_dialog({ action: "accept" })

wait_for - Wait for text

mcp__chrome-devtools__wait_for({ text: "Loading complete" })

Best Practices

1. Always snapshot first: Use take_snapshot before interacting to get uids
2. Select page first: Use select_page before page-specific operations
3. Check console for errors: Use list_console_messages for debugging
4. Inspect network: Use list_network_requests to debug API issues
5. Use emulation: Test with throttling for performance issues

References

For complete tool parameters, see references/tools.md.