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MCP server · Data

SandboxAPI

· github.com/sandboxapi/sandboxapi-mcp

Execute code in 8 languages (Python, JS, TS, Go, Java, C++, C, Bash) in gVisor sandboxes.

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About SandboxAPI

SandboxAPI is an MCP server in the Data category: execute code in 8 languages (Python, JS, TS, Go, Java, C++, C, Bash) in gVisor sandboxes. It has been installed 0 times through Conduid.

Install

Clone
git clone https://github.com/sandboxapi/sandboxapi-mcp

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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README

SandboxAPI MCP Server

MCP Languages License

Give your AI agent the ability to execute code in 8 programming languages, safely.

SandboxAPI MCP Server connects any MCP-compatible AI client (Claude, Cursor, VS Code, Windsurf, etc.) to secure code execution. Every execution runs inside a gVisor-sandboxed Docker container with no network access, strict resource limits, and ephemeral filesystems.

Quick Start

Option 1: Remote Server (No Setup)

Connect directly to the hosted endpoint. No local installation required.

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "sandboxapi": {
      "url": "https://mcp.sandboxapi.dev/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

VS Code (.vscode/mcp.json):

{
  "servers": {
    "sandboxapi": {
      "url": "https://mcp.sandboxapi.dev/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json):

{
  "mcpServers": {
    "sandboxapi": {
      "url": "https://mcp.sandboxapi.dev/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Option 2: Docker

docker run -d \
  -p 8081:8081 \
  -e SANDBOXAPI_API_KEY=your_sandboxapi_key \
  -e MCP_API_KEY=your_mcp_auth_key \
  sandboxapi/mcp:latest

Then point your client to http://localhost:8081/mcp.

Option 3: Build from Source

git clone https://github.com/sandboxapi/sandboxapi-mcp.git
cd sandboxapi-mcp
go build -o sandboxapi-mcp .

export SANDBOXAPI_API_KEY=your_key
export MCP_API_KEY=optional_auth_key
./sandboxapi-mcp

Available Tools

execute_code

Execute code in a sandboxed container.

Parameter Type Required Description
language string Yes python3, javascript, typescript, bash, java, cpp, c, go
code string Yes Source code to execute (max 1MB)
timeout number No Timeout in seconds (default: 10, max: 300)
stdin string No Standard input to pass to the program

execute_batch

Execute multiple code snippets. Each runs in its own isolated sandbox.

Parameter Type Required Description
executions array Yes Array of {language, code, timeout?, stdin?} objects

list_languages

List all supported programming languages with versions and example code. No parameters.

Supported Languages

Language Version Aliases
Python 3.12 python3, python, py
JavaScript Node 22 javascript, js, node
TypeScript 5.4 typescript, ts
Go 1.22 go, golang
Java 21 java, jdk
C++ GCC 14 cpp, c++
C GCC 14 c, gcc
Bash 5.2 bash, sh, shell

Environment Variables

Variable Required Description
SANDBOXAPI_API_KEY Yes API key for the SandboxAPI backend
MCP_API_KEY No Auth key for the MCP endpoint (omit for open access)
MCP_PORT No Port to listen on (default: 8081)
SANDBOXAPI_URL No API base URL (default: https://api.sandboxapi.dev)

Security

Every code execution is isolated with defense-in-depth:

  • gVisor (runsc) — User-space kernel intercepts all syscalls
  • Network isolation — Executed code cannot make outbound connections
  • Resource limits — CPU, memory, and disk usage are capped
  • Ephemeral containers — Destroyed immediately after execution
  • Read-only filesystem — No persistent writes between executions
  • Code size limits — Source code capped at 1MB
  • Timeout enforcement — Hard kill after configured timeout

API Key

Get your API key at sandboxapi.dev or through RapidAPI.

Links

License

MIT

README mirrored from the source repository 5 months ago. The original is authoritative.

Questions

About SandboxAPI

How do I install SandboxAPI?

Run git clone https://github.com/sandboxapi/sandboxapi-mcp, then add the server to your MCP client's configuration. Conduid has recorded 0 installs, so the command is known to work with current clients.

Is SandboxAPI safe to use with an AI agent?

Its trust score is 34 out of 100 (low). Conduid hasn't run static security checks on this repository yet, so review the source yourself before granting it credentials. It has no ConduID identity yet, so agent calls to it are not receipted.

Is SandboxAPI still maintained?

Conduid hasn't recorded a commit date for this repository yet. Check the repository directly for recent activity.