OnlineCompiler.io MCP Server: Install & Setup

Install OnlineCompiler.io in Claude Code

Claude Code

claude mcp add --transport http onlinecompiler-io https://api.onlinecompiler.io/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "onlinecompiler-io": {
      "url": "https://api.onlinecompiler.io/mcp"
    }
  }
}

Run Python, Java, C, C++, C#, Go, Rust and 39 more languages, each run in a fresh, offline sandbox.

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Remote. Hosted by the provider. You connect with a URL, nothing to install.

Run: claude mcp add --transport http onlinecompiler-io https://api.onlinecompiler.io/mcp

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