How to connect E2b to Claude

Connect Claude Web, Desktop and Cowork 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.

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E2b

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.

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Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your E2b account to Claude via Composio Connect, enabling it to run a Python script to analyze CSV data, execute JavaScript code to validate user input, start a sandbox and list installed packages, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Connecting E2b to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash

https://connect.composio.dev/mcp

Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your E2b account

Back in Claude, ask it to connect to E2b or give it any E2b-related task.

For example, ask Claude to:

"Run a Python script to analyze CSV data"
"Execute JavaScript code to validate user input"
"Start a sandbox and list installed packages"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your E2b account is ready to use.

What is the E2b Claude Connector, 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.

Troubleshooting

1. Why does Claude not use the Composio connector for E2b?

The connector can show as connected, but Claude must use it in each E2b conversation.

Click + at the lower left of the chat, or type /.
Hover Connectors.
Turn on Composio.
Ask Claude to connect to E2b again.

2. Why does Claude show an MCP server error before E2b connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for E2b.

Check that the connector URL is https://connect.composio.dev/mcp.
Connectors run from Anthropic's cloud, so your device network is usually not the problem.
Add the connector again from Customize > Connectors, then ask Claude to connect E2b.
If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the E2b authorization link not work?

The Composio connector is one server. Your E2b account connects separately when Claude asks for it.

If the browser does not open, or the link expires, ask Claude to retry the E2b connection.
Composio creates a fresh E2b authorization link.
Open that link in your browser and finish the E2b sign-in.

4. Why do E2b actions fail after they worked before?

The E2b connection can expire or lose permission.

Ask Claude to inspect the E2b connection.
If the connection is unhealthy, disconnect it when Claude prompts you.
Reconnect the E2b account and retry the action.
If Claude shows a permission prompt, approve it before Claude changes data in E2b.
If the action still fails with a permission error, check that the connected account has that permission in E2b itself.

5. How do I switch to a different E2b account?

Claude can manage the E2b connection for you.

Ask Claude to disconnect or delete the current E2b account.
Ask Claude to connect E2b again.
Open the new Composio authorization link for E2b.
Sign in with the other E2b account in the browser.
After the account connects, ask Claude to retry the E2b task.

6. Why is my E2b connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your E2b connection works in Claude Web, Desktop, and Cowork.

In Claude Desktop, open Customize > Connectors.
Next to Composio, click ⋮ and click Clear cache.
If E2b tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect E2b.

TOOLS

Supported Tools

Every E2b action and event your agent gets out of the box.

Connect to Sandbox

Tool to connect to an existing E2B sandbox and retrieve its details.

Create Template

Tool to create a new E2B template with specified configuration.

Create Webhook

Tool to register a new webhook to receive sandbox lifecycle events for the team.

Delete Sandbox

Tool to terminate and permanently delete a running E2B sandbox instance.

Delete Webhook

Tool to unregister a webhook and stop receiving lifecycle events.

Check API Health

Tool to check the health status of the E2B API.

Get Sandbox

Tool to retrieve detailed information about a specific sandbox by its ID.

Get Sandbox Logs

Tool to retrieve logs from a specific E2B sandbox instance.

Get Sandbox Lifecycle Events

Tool to retrieve the latest lifecycle events for a particular sandbox instance.

Get Sandbox Metrics

Tool to retrieve timestamped CPU, memory, and disk usage metrics for a sandbox.

Get Team Metrics

Tool to retrieve timestamped CPU, memory, and disk usage metrics for a team.

Get Team Maximum Metrics

Tool to retrieve the maximum value for a specific team metric in a given interval.

Get Template Build Status

Tool to get the status of a template build.

Get Template Files

Tool to get an upload link for a tar file containing build layer files.

Get Webhook Configuration

Tool to retrieve the current webhook configuration for a specific webhook.

List All Sandboxes

Tool to list all running and paused sandboxes associated with your team.

List Sandboxes Metrics

Tool to retrieve timestamped CPU, memory, and disk usage metrics for multiple sandboxes.

List Team Sandbox Lifecycle Events

Tool to retrieve the latest lifecycle events across all sandboxes associated with the team.

List All Templates

Tool to list all available E2B templates for your team.

List All Webhooks

Tool to retrieve all registered webhooks for your team.

Pause Sandbox

Tool to pause a running E2B sandbox preserving its filesystem and memory state.

Create Sandbox

Tool to create a new E2B sandbox from a template.

Set Sandbox Timeout

Tool to set the timeout for an E2B sandbox.

Refresh Sandbox

Tool to refresh an E2B sandbox and extend its time to live.

Start Template Build

Tool to start a build for an E2B template.

Update Template

Tool to update an E2B template configuration.

Update Webhook Configuration

Tool to update an existing webhook configuration including URL, enabled status, and subscribed events.

FRAMEWORKS

How to build E2b MCP Agent with another framework

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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. Claude Cowork 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.

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How to connect E2b to Claude

Connect E2b without auth hassles

Introduction

Also integrate E2b with

Connecting E2b to Claude Web, Desktop, and Cowork

1. Add with one click

Add manually

2. Authorize in your browser

3. Connect your E2b account

What is the E2b Claude Connector, and what's possible with it?

Troubleshooting

1. Why does Claude not use the Composio connector for E2b?

2. Why does Claude show an MCP server error before E2b connects?

3. Why does the E2b authorization link not work?

4. Why do E2b actions fail after they worked before?

5. How do I switch to a different E2b account?

6. Why is my E2b connection missing in Claude Desktop or on a Team plan?

Supported Tools

How to build E2b MCP Agent with another framework

Claude Code

Cursor

ChatGPT

Antigravity

OpenAI Agents SDK

Claude Agent SDK

Codex

Grok Build

VS Code

OpenCode

OpenClaw

Hermes

Atomic Agent

Pi

DeepSeek Harness

Google ADK

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Pydantic AI

AutoGen

Explore Other Toolkits

Supabase

Composio

Codeinterpreter

GitHub

Frequently asked questions

What are the differences in Tool Router MCP and E2b MCP?+

Can I use Tool Router MCP with Claude Cowork?+

Can I manage the permissions and scopes for E2b while using Tool Router?+

How safe is my data with Composio Tool Router?+

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