codex-browser-bridge

Let Claude Code and other MCP agents control your existing Chrome browser through Codex Desktop's browser bridge.
52 MCP tools. Pure Rust. Single binary. Zero config.

中文

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What It Does

codex-browser-bridge turns your local Codex Desktop + Chrome into an MCP server that any agent can control.

No browser profile copying. No WebDriver. No remote setup. It connects to the Codex browser named pipe that already exists on your machine, speaks the same JSON-RPC protocol, and exposes 52 MCP tools for browser automation.

Your agent can:

• Open, close, and switch browser tabs
• Navigate pages, go back/forward, wait for loads
• Capture screenshots (viewport PNG)
• Read DOM / accessibility trees (including ARIA role+name search)
• Click, type, scroll — via CSS selectors, coordinates, or accessibility node IDs
• Execute arbitrary JavaScript in the page context
• Upload files to <input type=file> elements
• Handle JavaScript dialogs (alert / confirm / prompt)
• Read and set browser cookies
• Run raw CDP commands (Chrome DevTools Protocol escape hatch)
• Self-diagnose with codex_doctor

Useful when an agent needs to work with pages that require a real browser session — dashboards, logged-in web apps, local dev servers, documentation sites.

Quick Install

npm i -g @delicious233/codex-browser-bridge

Or download from GitHub Releases.

Requires: Windows · Chrome · Codex Desktop · Codex Chrome Extension

30-Second Setup (Claude Code)

Add to your Claude Code MCP settings:

{
  "mcpServers": {
    "codex-browser": {
      "command": "codex-browser-bridge",
      "args": ["--mode", "mcp"],
      "transport": "stdio"
    }
  }
}

Restart Claude Code. Then ask:

List my open browser tabs.
Open https://example.com and take a screenshot.
Find the login button and click it.

For Cursor, OpenClaw, Hermes Agent — see examples/.

3. Install the agent skill (recommended)

The npm package includes a skill that teaches agents how to use all 52 tools effectively. After install, copy it to your skills directory:

# Global install → Claude Code skills
cp -r "$(npm root -g)/@delicious233/codex-browser-bridge/skills/codex-browser" ~/.claude/skills/

# Or into a local project
cp -r node_modules/@delicious233/codex-browser-bridge/skills/codex-browser .claude/skills/

👤 For agents reading this: to self-install, run the copy command above against your own skills directory. The skill is at skills/codex-browser/SKILL.md inside the installed npm package.

All 52 MCP Tools

Tab Management [Tabs]

Tool	Description
codex_list_tabs	List tabs owned by this session
codex_create_tab	Create a new blank tab
codex_close_tab	Close a tab by ID
codex_user_tabs	List all browser tabs (including unclaimed)
codex_claim_tab	Claim an existing user tab

Navigation [Navigation]

Tool	Description
codex_navigate	Navigate to URL
codex_reload	Reload current page
codex_navigate_back	Go back one history entry
codex_navigate_forward	Go forward one history entry
codex_wait_for_load	Poll document.readyState until complete
codex_nav_and_wait	Navigate + wait (1 call instead of 2)
codex_wait_for_element	Poll a CSS selector until it matches (SPAs)
codex_wait_for_url	Poll until URL contains a substring (SPA routes)

DOM & Accessibility [DOM]

Tool	Description
codex_dom_snapshot	Full accessibility tree with node IDs
codex_dom_get_visible	Human-readable visible DOM tree
codex_dom_click	Click by accessibility node ID
codex_find_element	Find elements by ARIA role + name
codex_click_element	Click element from codex_find_element result

Page Inspection [Page]

Tool	Description
codex_get_url	Current tab URL
codex_get_title	Current page title
codex_evaluate	Execute JavaScript, return JSON result
codex_page_assets	List page resources (images, CSS, JS, fonts)
codex_console_logs	Capture console output for a window
codex_emulate_device	Emulate mobile viewport (reset=true to clear)
codex_screenshot	Capture viewport PNG screenshot
codex_screenshot_element	Capture a single element by selector
codex_print_pdf	Render page to PDF
codex_bring_to_front	Activate a background tab (fixes screenshot timeouts)
codex_dialog	Handle alert / confirm / prompt
codex_performance_metrics	DOM nodes, JS heap, event listeners (Performance)

Input & Interaction [Input]

Tool	Description
codex_click	Click by CSS selector (JS click)
codex_fill	Fill input by CSS selector
codex_hover	Hover over element (dropdowns, tooltips)
codex_select_option	Set <select> value + fire change
codex_drag	CDP mouse drag (sliders, sortable lists)
codex_cua_click	Click at exact coordinates (CDP mouse events)
codex_cua_type	Type text at current focus
codex_cua_keypress	Press key sequence (Enter, Ctrl+C, etc.)
codex_cua_scroll	Scroll at coordinates by delta
codex_click_and_wait	Click + wait for load (1 call)
codex_form_fill	Fill multiple fields from {selector: value} map
codex_file_input	Upload files to <input type=file>

Network [Network]

Tool	Description
codex_network_cookies	Read cookies (values redacted by default)
codex_network_set_cookie	Set a browser cookie
codex_delete_cookies	Delete cookies by name
codex_storage	Get/set localStorage
codex_network_monitor	Pair request↔response into structured list

CDP Escape Hatch [CDP]

Tool	Description
codex_execute_cdp	Execute any CDP command (allowlist-protected)

Session [Session]

Tool	Description
codex_name_session	Name the current session
codex_finalize	Clean up tabs, release resources
codex_get_info	Get extension backend metadata
codex_doctor	Self-diagnostics (pipe health, latency, version)

CLI Usage

# MCP mode (default)
codex-browser-bridge --mode mcp

# List active pipes
codex-browser-bridge --mode discover

# Interactive REPL for debugging
codex-browser-bridge --mode cli

# With tool profiles
codex-browser-bridge --mode mcp --profile basic     # 33 tools
codex-browser-bridge --mode mcp --profile network   # 50 tools
codex-browser-bridge --mode mcp --profile full      # all 52 (default)

Architecture

MCP Client (Claude Code / Cursor / OpenClaw)
        │ stdio JSON-RPC
        ▼
codex-browser-bridge (Rust binary)
        │ length-prefixed JSON-RPC frames
        ▼
Windows Named Pipe \\.\pipe\codex-browser-use-*
        │
        ▼
Codex Desktop → Chrome Extension → Chrome tabs

Security

This tool gives an agent access to your active browser session.

• Never expose to a network port
• Only run for trusted MCP clients
• Review agent actions before allowing sensitive operations
• Avoid using on pages with passwords, payments, or admin consoles
• Redact tab titles, URLs, DOM text, screenshots before sharing output
• codex_file_input enforces path traversal prevention (canonicalize + prefix check, 10 MB limit)
• Cookie values redacted by default; CDP allowlist blocks dangerous domains

Development

git clone https://github.com/DeliciousBuding/codex-browser-bridge.git
cd codex-browser-bridge

cargo check --locked
cargo test --locked
cargo clippy --locked -- -D warnings
cargo build --locked --release

Source layout:

src/
  mcp/          MCP server (mod, types, schema, handlers, profiles)
  browser.rs    CDP + browser operations
  client.rs     Named pipe transport + sticky attach
  security.rs   URL + file path validation
  doctor.rs     Pipe diagnostics
  cli.rs        Interactive debug REPL
  discovery.rs  Pipe auto-discovery
  protocol.rs   Length-prefixed JSON-RPC frames

Roadmap

See ROADMAP.md. Highlights:

• codex_network_monitor — request/response inspection
• codex_emulate_device — mobile viewport emulation
• codex_storage — localStorage / sessionStorage access
• v2.0.0: Cross-platform (macOS / Linux via Unix domain sockets)

Related

• examples/ — MCP configs for Claude Code, Cursor, OpenClaw, Hermes Agent
• skills/codex-browser/ — Agent skill (LLM usage guide)
• ROADMAP.md — Full roadmap with SUPER scores
• CHANGELOG.md — Release history
• CONTRIBUTING.md — Dev setup and conventions

License

MIT. Maintained independently from Codex / Anthropic / Google.

Acknowledgments

Thanks to LINUX DO for community support and feedback.