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Execute code in 8 languages (Python, JS, TS, Go, Java, C++, C, Bash) in gVisor sandboxes.
About
Execute code in 8 languages (Python, JS, TS, Go, Java, C++, C, Bash) in gVisor sandboxes.
Remote endpoints: streamable-http: https://mcp.sandboxapi.dev/mcp
Security Report
10.0
Low Risk10.0Low RiskValid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.
Endpoint verified · Requires authentication · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"io-github-michielderuiter-sandboxapi-mcp": {
"url": "https://mcp.sandboxapi.dev/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
SandboxAPI MCP Server
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
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