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Compiler Explorer

Compiler Explorer is an MCP server that adds developer tools to AI assistants such as Claude Code, Cursor and VS Code. Compile code with thousands of compilers, inspect the assembly, and share godbolt.org links. It has 19,150 GitHub stars, is released under the BSD-2-Clause license and runs as a remote server at https://godbolt.org/mcp.

github.com/compiler-explorer/compiler-explorer (opens in a new tab)

Data as of from the GitHub API and the official MCP registry; description from the project's repository. Report an error

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Install Compiler Explorer

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

Settings > Connectors > Add custom connector
URL: https://godbolt.org/mcp

Remote servers are added as a custom connector, not in claude_desktop_config.json.

Claude Code

claude mcp add --transport http compiler-explorer "https://godbolt.org/mcp"

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "compiler-explorer": {
      "url": "https://godbolt.org/mcp"
    }
  }
}

VS Code

.vscode/mcp.json
{
  "servers": {
    "compiler-explorer": {
      "type": "http",
      "url": "https://godbolt.org/mcp"
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About Compiler Explorer

Compiler Explorer is an interactive compiler exploration website. Edit code in C, C++, C#, F#, Rust, Go, D, Haskell, Swift, Pascal, ispc, Python, Java, or any of the other 30+ supported languages, and see how that code looks after being compiled in real time.

  • rust
  • c-plus-plus
  • go
  • dlang
  • compiler
  • cpp
  • assembly
  • ispc
  • haskell
  • swift

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FAQ

Compiler Explorer FAQ

Still curious? Email info@appsgit.com.

How do I install the Compiler Explorer MCP server?

It is a remote MCP server at https://godbolt.org/mcp. Add it with claude mcp add --transport http in Claude Code, as a url entry in .cursor/mcp.json or .vscode/mcp.json, or as a custom connector in the Claude apps.

Is Compiler Explorer free?

The server is open source under the BSD-2-Clause license, so running it is free. It does not declare any required API key.

Is Compiler Explorer actively maintained?

The most recent commit was on Oct 26, 2026. appsgit only lists MCP servers with a commit in the last six months.