# Compiler Explorer (MCP server)

> 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 19,108 GitHub stars, is released under the BSD-2-Clause license and runs as a remote server at https://godbolt.org/mcp.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/compiler-explorer/compiler-explorer |
| GitHub stars | 19,108 |
| License | BSD-2-Clause |
| Language | TypeScript |
| Transport | streamable-http |
| Packages | none (remote only) |
| Remote URL | https://godbolt.org/mcp |
| Needs API key | no |
| Official | yes |
| Works with | Claude Code, Cursor, VS Code, Claude.ai, ChatGPT |
| Category | Developer tools |
| Latest release | none |
| Last commit | Oct 6, 2026 |
| MCP registry name | io.github.compiler-explorer/compiler-explorer |

## Install

### 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

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

### Cursor (.cursor/mcp.json)

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

### VS Code (.vscode/mcp.json)

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

Config formats checked against the official docs on 2026-10-07.

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