Runno vs SandboxAPI

In-depth architectural comparison of the Runno and SandboxAPI MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

Choose Runno when:

• You need dedicated capabilities in the Code Execution domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: MCP access to Runno's sandbox, WebAssembly and WASI-based execution, Python, Ruby, QuickJS, SQLite, C, C++, and PHP CGI runtimes.

Explore Runno Details

Choose SandboxAPI when:

• You need dedicated capabilities in the Code Execution domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
• You have access to required keys: SANDBOXAPI_API_KEY, MCP_API_KEY, MCP_PORT, SANDBOXAPI_URL.
• Primary tools included: execute_code, execute_batch, list_languages.

Feature & Specification Comparison

Specification	Runno Code Execution	SandboxAPI Code Execution
Summary	Sandboxed runtime for programming languages and WASI binaries. Works in the browser, on your server, or via MCP.	Execute code in 8 languages (Python, JS, TS, Go, Java, C++, C, Bash) in gVisor sandboxes.
Category & Scope	Code Execution	Code Execution
Quality signal

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "runno": {
      "command": "npx",
      "args": [
        "@runno/mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "sandboxapi": {
      "url": "https://mcp.sandboxapi.dev/mcp"
    }
  }
}

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