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Run Python, Java, C, C++, C#, Go, Rust and 39 more languages, each run in a fresh, offline sandbox.
npx @getmcp/cli add io.onlinecompiler/compilerRequires Node.js 18+. Community-contributed server. Review source before installing.
AuthorizationYour OnlineCompiler.io API key as a Bearer token. Get a free key at https://api.onlinecompiler.io/compilers/api-keys/
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io.onlinecompiler/compiler": {
"url": "https://api.onlinecompiler.io/mcp",
"transport": "streamable-http",
"headers": {
"Authorization": "Bearer {api_key}"
}
}
}
}