Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With E2b MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.
- Builders & DevelopersCOMPOSIOFOR YOUGive Claude, codex, or any harness secure access to 1000+ tools
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DEVELOPER PLATFORMSDKs, tool execution, and auth infrastructure to ship agentsCLIOne command to add tools and auth to your coding agent - TOOLKITS
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How to integrate E2b MCP with Codex
Connect Codex to E2b MCP. Run a python script to analyze csv data, execute javascript code to validate user input, and more using natural language, with authentication handled for you.
Api Key
E2b is an open-source platform for running code in secure, sandboxed environments. It enables safe multi-language code execution for AI-powered apps.
27 Tools
Introduction
Also integrate E2b 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 1000+ 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 E2b MCP in Codex
Run the setup command
Run this command in your terminal to add the Composio MCP server to Codex.
It will initiate the authentication in a browser window, authorize Codex to access your Composio account.
(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 composioVerify the connection
Run codex mcp list to confirm Composio appears as a registered MCP server.
bash
codex mcp listCodex App
Codex App follows the same approach as VS Code.
- Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
- Fill the header and Key fields with
{ "x-consumer-api-key" = "ck_*******" }. - The Key is the Composio API key, that you can find on dashboard.composio.dev
- Click on Authenticate and authorize Codex to your Composio account and you're all set.
- 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_*******" }What is the E2b MCP server, and what's possible with it?
The E2b MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your E2b account. It provides structured and secure access so your agent can perform E2b operations on your behalf.
Conclusion
You've successfully integrated E2b with Codex using Composio's MCP server. Now you can interact with E2b 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 E2b operations
- Managed authentication through Composio
- Access to 20,000+ tools across 1000+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various E2b operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities
TOOLS
Supported Tools
Every E2b action and event your agent gets out of the box.
FRAMEWORKS
How to build E2b MCP Agent with another framework
ChatGPT Work
Use E2b MCP with ChatGPT Work
Antigravity
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OpenAI Agents SDK
Use E2b MCP with OpenAI Agents SDK
Claude Agent SDK
Use E2b MCP with Claude Agent SDK
Claude Code
Use E2b MCP with Claude Code
Claude Cowork
Use E2b MCP with Claude Cowork
Grok Build
Use E2b MCP with Grok Build
Cursor
Use E2b MCP with Cursor
VS Code
Use E2b MCP with VS Code
OpenCode
Use E2b MCP with OpenCode
OpenClaw
Use E2b MCP with OpenClaw
Hermes
Use E2b MCP with Hermes
Google ADK
Use E2b MCP with Google ADK
LangChain
Use E2b MCP with LangChain
Vercel AI SDK
Use E2b MCP with Vercel AI SDK
Mastra AI
Use E2b MCP with Mastra AI
LlamaIndex
Use E2b MCP with LlamaIndex
CrewAI
Use E2b MCP with CrewAI
Pydantic AI
Use E2b MCP with Pydantic AI
AutoGen
Use E2b MCP with AutoGen
MORE TOOLKITS
Explore Other Toolkits
Supabase
Oauth2Api Key
Supabase is an open-source backend platform offering scalable Postgres databases, authentication, storage, and real-time APIs. It lets developers build modern apps without managing infrastructure.
Composio
No Auth
Composio is an integration platform that connects AI agents with hundreds of business tools. It streamlines authentication and lets you trigger actions across services—no custom code needed.
Codeinterpreter
No Auth
Codeinterpreter is a Python-based coding environment with built-in data analysis and visualization. It lets you instantly run scripts, plot results, and prototype solutions inside supported platforms.
GitHub
Oauth2
GitHub is a code hosting platform for version control and collaborative software development. It streamlines project management, code review, and team workflows in one place.
FAQ
Frequently asked questions
With a standalone E2b MCP server, the agents and LLMs can only access a fixed set of E2b tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from E2b and many other apps based on the task at hand, all through a single MCP endpoint.
Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right E2b tools.
Yes, absolutely. You can configure which E2b scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.
All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your E2b data and credentials are handled as safely as possible.
Start with E2b.It takes 30 seconds.
Managed auth, hosted MCP servers, and every E2b tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building