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OnlineCompiler.io

io.onlinecompiler/compiler ยท v1.2.1

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

Connect Remote server

Terminal
claude mcp add --transport http compiler https://api.onlinecompiler.io/mcp --header "Authorization: Bearer <YOUR_API_KEY>"
~/.cursor/mcp.json
{
  "mcpServers": {
    "compiler": {
      "url": "https://api.onlinecompiler.io/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "compiler": {
      "type": "http",
      "url": "https://api.onlinecompiler.io/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://api.onlinecompiler.io/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server asks for a key before it lists its tools. Connect it with your own key to see them.

Headers

NameDescription
Authorization
Optional, secret
Optional: your OnlineCompiler.io API key as a Bearer token. Leave it out to sign in with OAuth instead. Get a free key at https://api.onlinecompiler.io/compilers/api-keys/

Details

Endpointhttps://api.onlinecompiler.io/mcp (Streamable HTTP)
First published7 Nov 2026
Last updated7 Nov 2026
Registry nameio.onlinecompiler/compiler

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