How to integrate Browser tool MCP with Codex

Connect Codex to Browser tool MCP. Copy highlighted text from this webpage, drag and drop a file to upload section, and more using natural language, with authentication handled for you.

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Browser tool is a virtual browser integration that lets AI agents interact with the web programmatically. It enables automated browsing, scraping, and action-taking from any AI workflow.

5 Tools

Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With the Browser tool MCP integration, Codex can run browser tasks, watch them in real time, download task files, and stop running tasks, all without leaving the terminal or the app, whichever you prefer.

For exact tool slugs and parameter tables, see the tool catalog in the Composio docs.

Also integrate Browser tool with

Why use Composio?

Apart from a managed and hosted MCP server, you will get:

  • CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool responses: Handle them to minimise context rot.
  • Dynamic just-in-time access to 20,000 tools across 1700+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.

How to install Browser tool MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(Optional) Authenticate with OAuth

To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.

bash
codex mcp login composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. Restart and verify if it's there in .codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }

Try it

Ask Codex for a Browser tool task. The first time, Composio asks you to connect your Browser tool account.

For example, ask it to:

  • "Copy highlighted text from this webpage"
  • "Drag and drop a file to upload section"
  • "Fetch and summarize main page content"

What is the Browser tool MCP server, and what's possible with it?

The Browser Tool MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to Browser Tool. It provides structured and secure access to AI-powered browser tasks and sessions, so your agent can automate web interactions, monitor task progress, watch sessions, retrieve generated files, and stop tasks on your behalf.

  • AI-powered browser automation: Have your agent navigate websites, extract data, complete forms, monitor pages, or run automated website tests.
  • Task progress monitoring: Let the agent follow an active browser task until its results are ready.
  • Live session viewing: Direct your agent to provide a live browser session link so you can watch the task in real time.
  • Generated file retrieval: Instruct your agent to retrieve a downloadable file created during a browser task.
  • Task and session control: Have your agent stop a running browser task and end its session when it is no longer needed.

Conclusion

You've successfully integrated Browser tool with Codex using Composio's MCP server. Now you can interact with Browser tool directly from your terminal, VS Code, or the Codex App using natural language commands.

Key benefits of this setup:

  • Seamless integration across CLI, VS Code, and standalone app
  • Natural language commands for Browser tool operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1700+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Browser tool operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities
TOOLS

Supported Tools

Every Browser tool action and event your agent gets out of the box.

Run Browser Task

Run an AI-powered browser automation task in a new or existing cloud browser session.

Download Task File

Get a download URL for a file generated by a task.

Get Session Live URL

Get session status and, when available, a live URL for watching a browser session.

Stop Browser Task

Kill a browser task and its session.

Watch Browser Task

Poll a browser task for progress and results, returning on a terminal status or after up to 30 seconds of polling.

FAQ

Frequently asked questions

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