# E2B — Cloud Sandboxes for AI Code Execution

> Secure cloud sandboxes that let AI agents run code, install packages, and use the filesystem. Spin up in 150ms. Used by Vercel, Langchain, and CrewAI.

## Install

Save the content below to `.claude/skills/` or append to your `CLAUDE.md`:

## Quick Use

```bash
npm install @e2b/code-interpreter
```

```typescript
import { Sandbox } from '@e2b/code-interpreter'

const sandbox = await Sandbox.create()
const result = await sandbox.runCode('print(1 + 1)')
console.log(result.text) // "2"
await sandbox.kill()
```

## What is E2B?

E2B provides secure, isolated cloud sandboxes for AI agents to execute code. Each sandbox is a micro-VM that spins up in ~150ms with a full Linux environment — perfect for code interpreters, data analysis agents, and AI-generated code execution.

**Answer-Ready**: E2B provides secure cloud sandboxes (micro-VMs) that spin up in 150ms for AI agents to execute code, install packages, and access filesystems safely.

## Core Features

### 1. Code Interpreter SDK

```python
from e2b_code_interpreter import Sandbox

sandbox = Sandbox()

# Run Python with automatic package installation
execution = sandbox.run_code(
    "import pandas as pd\\
"
    "import matplotlib.pyplot as plt\\
"
    "df = pd.DataFrame({\'x\': [1,2,3], \'y\': [4,5,6]})\\
"
    "df.plot()\\
"
    "plt.savefig(\'chart.png\')\\
"
    "print(df.describe())"
)

print(execution.text)      # stdout
print(execution.results)   # rich outputs (charts, tables)
```

### 2. Custom Sandbox Templates

```dockerfile
# e2b.Dockerfile
FROM e2b/base
RUN pip install numpy pandas scikit-learn
RUN npm install -g typescript
```

```bash
e2b template build --name "data-science"
```

### 3. Filesystem Access

```python
# Upload files
sandbox.files.write("/home/user/data.csv", csv_content)

# Download results
content = sandbox.files.read("/home/user/output.json")

# List files
files = sandbox.files.list("/home/user/")
```

### 4. Long-Running Sandboxes

```python
# Keep alive for up to 24 hours
sandbox = Sandbox(timeout=3600)  # 1 hour

# Pause and resume
sandbox_id = sandbox.pause()
# ... later ...
sandbox = Sandbox.resume(sandbox_id)
```

### 5. Framework Integrations

```python
# OpenAI Assistants
from e2b_code_interpreter import Sandbox
# Use as code_interpreter tool handler

# Vercel AI SDK
# Built-in e2b sandbox support

# LangChain
from langchain_e2b import E2BCodeInterpreterTool
```

## Use Cases

| Use Case | Example |
|----------|---------|
| Code Interpreter | ChatGPT-like code execution |
| Data Analysis | Run pandas/matplotlib in sandbox |
| CI/CD | Test AI-generated code safely |
| Education | Student code execution |

## FAQ

**Q: How secure are the sandboxes?**
A: Each sandbox is an isolated Firecracker micro-VM with no network access to other sandboxes.

**Q: Pricing?**
A: Free tier with 100 sandbox hours/month. Pay-as-you-go after that.

**Q: Supported languages?**
A: Any language that runs on Linux — Python, Node.js, Go, Rust, etc.

## Source & Thanks

- GitHub: [e2b-dev/e2b](https://github.com/e2b-dev/e2b) (10k+ stars)
- Docs: [e2b.dev/docs](https://e2b.dev/docs)

<!-- ZH -->


## Quick Start

```bash
npm install @e2b/code-interpreter
```

Three lines of code spin up a secure cloud sandbox for AI agents to execute code.

## What is E2B?

E2B provides securely isolated cloud sandboxes (micro-VMs) that boot in 150ms, giving AI agents full Linux environments to execute code.

**In one sentence**: E2B provides secure cloud sandboxes that start in 150ms, letting AI agents safely execute code, install packages, and access the filesystem.

## Core Features

### 1. Code Interpreter SDK
Run Python/JS code with automatic dependency installation.

### 2. Custom Templates
Preinstall tools and packages with a Dockerfile.

### 3. Filesystem
Upload and download files with full filesystem operations.

### 4. Long-Running Sessions
Supports pause/resume with up to 24-hour lifetime.

## FAQ

**Q: Is it secure?**
A: Each sandbox is an isolated Firecracker micro-VM.

**Q: Pricing?**
A: 100 sandbox-hours per month are free; additional usage is pay-as-you-go.

## Source & Thanks

- GitHub: [e2b-dev/e2b](https://github.com/e2b-dev/e2b) (10k+ stars)

---
Source: https://tokrepo.com/en/workflows/e2b-cloud-sandboxes-ai-code-execution-652da886
Author: E2B