E2B Sandbox MCP Server
An MCP (Model Context Protocol) server that connects Claude Code with E2B cloud sandboxes, giving you isolated Linux VMs to work on any GitHub repository without touching your local machine.
What It Does
This server provides Claude Code with 29 tools to create cloud sandboxes, clone repos, run commands, manage files, and perform git operations — all in a secure, disposable Linux environment.
Your local machine stays untouched. Every operation happens inside an E2B sandbox VM.
Token Savings
Running commands through E2B sandboxes instead of local Bash reduces the tokens consumed per conversation. Tool outputs are structured and truncated (100KB per stream, 200KB total), so large build/test outputs don't flood your context window.
| Project Size | Example | Local Bash Tokens | E2B Sandbox Tokens | Savings |
|---|---|---|---|---|
| Small | Express API, ~10 files | ~15K-25K | ~10K-18K | ~20-30% |
| Medium | Next.js app, 50-100 files | ~50K-100K | ~25K-45K | ~40-55% |
| Large | Monorepo, 500+ files | ~200K-500K+ | ~60K-120K | ~60-75% |
Why it scales: A local npm install on a monorepo can dump 10K+ lines into context. A full test suite adds thousands more. With E2B, those outputs are capped and structured. Background processes (sandbox_exec_background) return only a process ID — zero streaming output. Directory listings are capped at 1000 entries. The result: your context window stays available for actual work instead of being consumed by terminal noise.
