TabzChrome MCP Tools

TabzChrome provides 71 MCP tools for browser automation via Chrome Extension APIs.

Quick Start

# Always check schema first (MANDATORY)
mcp-cli info tabz/tabz_screenshot

# Then call the tool
mcp-cli call tabz/tabz_screenshot '{}'

Tool Categories (71 Tools)

Category	Tools	Purpose
Tab Management	`tabz_list_tabs`, `tabz_switch_tab`, `tabz_rename_tab`	Navigate tabs, accurate active detection
Tab Groups	`tabz_list_groups`, `tabz_create_group`, `tabz_update_group`, `tabz_add_to_group`, `tabz_ungroup_tabs`	Organize tabs into groups
Claude Group	`tabz_claude_group_add`, `tabz_claude_group_remove`, `tabz_claude_group_status`	Highlight tabs Claude is working with
Windows	`tabz_list_windows`, `tabz_create_window`, `tabz_update_window`, `tabz_close_window`	Manage browser windows
Displays	`tabz_get_displays`, `tabz_tile_windows`, `tabz_popout_terminal`	Multi-monitor layouts, tiling
Screenshots	`tabz_screenshot`, `tabz_screenshot_full`	Capture viewport or full page
Interaction	`tabz_click`, `tabz_fill`, `tabz_get_element`, `tabz_execute_script`	Click, fill forms, run JS
Downloads	`tabz_download_image`, `tabz_download_file`, `tabz_get_downloads`, `tabz_cancel_download`, `tabz_save_page`	Download files, save pages
Bookmarks	`tabz_get_bookmark_tree`, `tabz_search_bookmarks`, `tabz_save_bookmark`, `tabz_create_folder`, `tabz_move_bookmark`, `tabz_delete_bookmark`	Organize bookmarks
Network	`tabz_enable_network_capture`, `tabz_get_network_requests`, `tabz_clear_network_requests`	Monitor API calls
Inspection	`tabz_get_page_info`, `tabz_get_console_logs`	Debug, inspect pages
Debugger	`tabz_get_dom_tree`, `tabz_profile_performance`, `tabz_get_coverage`	DOM tree, metrics, coverage
Audio/TTS	`tabz_speak`, `tabz_list_voices`, `tabz_play_audio`	Text-to-speech, audio playback
History	`tabz_history_search`, `tabz_history_visits`, `tabz_history_recent`, `tabz_history_delete_url`, `tabz_history_delete_range`	Search and manage history
Sessions	`tabz_sessions_recently_closed`, `tabz_sessions_restore`, `tabz_sessions_devices`	Recover tabs, synced devices
Cookies	`tabz_cookies_get`, `tabz_cookies_list`, `tabz_cookies_set`, `tabz_cookies_delete`, `tabz_cookies_audit`	Debug auth, audit trackers
Emulation	`tabz_emulate_device`, `tabz_emulate_clear`, `tabz_emulate_geolocation`, `tabz_emulate_network`, `tabz_emulate_media`, `tabz_emulate_vision`	Responsive testing, accessibility
Notifications	`tabz_notification_show`, `tabz_notification_update`, `tabz_notification_clear`, `tabz_notification_list`	Desktop alerts with progress

Visual Feedback

Interaction tools show visual feedback when targeting elements:

Tool	Glow Color
`tabz_click`	Green (action completed)
`tabz_fill`	Blue (input focused)
`tabz_get_element`	Purple (inspecting)

Elements pulse twice and auto-scroll into view.

Getting CSS Selectors

Right-click any element on a webpage "Send Element to Chat" to capture:

Unique CSS selector (with :nth-of-type() for siblings)
Tag, ID, classes, text content
Useful attributes (data-testid, aria-label, role)

Common Workflows

Screenshot a Page

mcp-cli info tabz/tabz_screenshot
mcp-cli call tabz/tabz_screenshot '{}'            # Viewport
mcp-cli call tabz/tabz_screenshot_full '{}'       # Full scrollable page

Fill and Submit Form

mcp-cli call tabz/tabz_fill '{"selector": "#username", "value": "user@example.com"}'
mcp-cli call tabz/tabz_fill '{"selector": "#password", "value": "secret"}'
mcp-cli call tabz/tabz_click '{"selector": "button[type=submit]"}'

Debug API Issues

mcp-cli call tabz/tabz_enable_network_capture '{}'
# Trigger the action
mcp-cli call tabz/tabz_get_network_requests '{}'
mcp-cli call tabz/tabz_get_network_requests '{"filter": "/api/users"}'

Organize Tabs into Groups

mcp-cli call tabz/tabz_create_group '{"title": "Research", "color": "blue"}'
mcp-cli call tabz/tabz_add_to_group '{"groupId": 123, "tabIds": [456, 789]}'

Text-to-Speech

mcp-cli call tabz/tabz_list_voices '{}'
mcp-cli call tabz/tabz_speak '{"text": "Build complete"}'
mcp-cli call tabz/tabz_speak '{"text": "Alert!", "priority": "high"}'

Download Images

mcp-cli call tabz/tabz_download_image '{"selector": "img.hero-image"}'
mcp-cli call tabz/tabz_download_image '{"url": "https://example.com/image.png"}'

Tab Targeting (Critical)

Chrome tab IDs are large integers (e.g., 1762561083), NOT sequential like 1, 2, 3.

Always List Tabs First

mcp-cli call tabz/tabz_list_tabs '{}'

Returns:

{
  "claudeCurrentTabId": 1762561083,
  "tabs": [
    {"tabId": 1762561065, "url": "...", "active": false},
    {"tabId": 1762561083, "url": "...", "active": true}
  ]
}

Use Explicit tabId

# DON'T rely on implicit current tab
mcp-cli call tabz/tabz_screenshot '{}'  # May target wrong tab!

# DO use explicit tabId
mcp-cli call tabz/tabz_screenshot '{"tabId": 1762561083}'

Parallel Worker Isolation

When multiple Claude workers use tabz tools simultaneously, they MUST isolate tabs.

Required Pattern: Own Tab Group

# 1. Create unique group for this worker
SESSION_ID=$(tmux display-message -p '#{session_name}' 2>/dev/null || echo "worker-$$")
mcp-cli call tabz/tabz_create_group "{\"title\": \"$SESSION_ID\", \"color\": \"blue\"}"

# 2. Open tabs IN that group
mcp-cli call tabz/tabz_open_url '{"url": "https://example.com", "groupId": <group_id>}'

# 3. Always use explicit tabIds from YOUR group

Do's and Don'ts

Do	Don't
Create own tab group at start	Use shared "Claude" group
Store your tabIds after opening	Rely on `active: true` tab
Target tabs by explicit ID	Assume current tab is yours
Clean up group when done	Leave orphaned tabs/groups

MCP Server Configuration

Add to .mcp.json:

{
  "mcpServers": {
    "tabz": {
      "command": "/path/to/TabzChrome/tabz-mcp-server/run-auto.sh",
      "args": [],
      "env": { "BACKEND_URL": "http://localhost:8129" }
    }
  }
}

Limitations

tabz_screenshot cannot capture Chrome sidebar (Chrome limitation)
Always call mcp-cli info tabz/<tool> before mcp-cli call
Tab IDs are real Chrome tab IDs (large integers)
Debugger tools (DOM tree, coverage) show Chrome's debug banner

Reference Documentation

For detailed information:

references/mcp-tools.md - Complete tool reference
references/audio-tts.md - TTS voices, settings, API
references/api-endpoints.md - REST API reference
references/debugging.md - Troubleshooting guide

Resource	Purpose
`tabz-expert` agent	Spawn for complex browser work (user-scope plugin)
`tabz-artist` skill	Generate images (DALL-E) and videos (Sora) - now in TabzChrome

tabz-mcp