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Compiler Explorer MCP server

Compiler Explorer is Compiler Explorer's MCP server in the official registry (io.github.compiler-explorer/compiler-explorer). Declared transport: Streamable HTTP (remote).

★ 19,136 GitHub stars · 2026-10-17

Real user ratings coming soon

Transport	Streamable HTTP (remote)
Auth	No secrets declared in registry entry; uses your account with the vendor
Registry name	io.github.compiler-explorer/compiler-explorer · 1.0.0
Source	https://github.com/compiler-explorer/compiler-explorer
Remote endpoints	https://godbolt.org/mcp
Data source	Official MCP Registry
Kind	Community
GitHub stars	19,136 GitHub stars, fetched 2026-10-17
Date checked	2026-10-17
License	BSD-2-Clause
Last commit	2026-10-17

Verified on MCPwell

Verified on MCPwell means a read-only check against the public HTTPS URL on this page returned an initialize result and a tools/list result on 2026-10-17. The check sends those two JSON-RPC methods and nothing else. It does not send tools/call and it does not send a credential. It is the same pair of methods as the tester, run from MCPwell rather than from your browser. A browser test can still fail when the server does not send CORS headers. HTTP 401, a network error, or a missing tools/list result is not verified. The definition is also on the badge page.

Checked 2026-10-17. URL https://godbolt.org/mcp. initialize HTTP 200. tools/list HTTP 200. protocolVersion 2025-06-18; serverInfo name compiler-explorer; serverInfo version gh-19618; capability keys tools. The registry version on this fact sheet is 1.0.0.

Tools in that response

compile. readOnlyHint true.
list_compilers. readOnlyHint true.
list_languages. readOnlyHint true.
list_libraries. readOnlyHint true.
lookup_asm_instruction. readOnlyHint true.
generate_short_url. readOnlyHint false. destructiveHint false.
get_shortlink_info. readOnlyHint true.

Annotation fields on this response, counted only when the server set a boolean. The tools specification says clients must treat tool annotations as untrusted unless they come from a trusted server. A missing field is not counted as false, and it is not a safety claim.

readOnlyHint true: 6. false: 1. omitted: 0.
destructiveHint true: 0. false: 1. omitted: 6.

The tools/list result did not include nextCursor. The names below are what one request with empty params returned.

Maintainer? Add the badge

The image reads “MCPwell · verified 2026-10-17 · 7 tools”. It is generated from this check. It is not a user review and it does not mean the server was tested inside a particular client.

Markdown

[![MCPwell · verified 2026-10-17 · 7 tools](https://mcpwell.com/badge/compiler-explorer.svg)](https://mcpwell.com/servers/compiler-explorer/)

HTML

<a href="https://mcpwell.com/servers/compiler-explorer/"><img src="https://mcpwell.com/badge/compiler-explorer.svg" alt="MCPwell · verified 2026-10-17 · 7 tools" width="380" height="28"></a>

Test this endpoint

Setup guides: Claude Desktop, Claude Code, Cursor, VS Code. Before you connect a server, use the MCP security checklist.

Install

Configs are generated only from packages and remotes on the registry entry. Empty optional flags are listed instead of inserted. Nothing is added that the entry does not declare.

Remote

https://godbolt.org/mcp

Claude Desktop · mcpServers

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

Cursor · mcpServers

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

VS Code · .vscode/mcp.json

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

Claude Code · .mcp.json

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

claude mcp add

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

FAQ

What transport does Compiler Explorer use?

Streamable HTTP (remote).

What credentials are declared for Compiler Explorer?

No secrets declared in registry entry; uses your account with the vendor.

When was this checked, and what is the source?

These facts were checked on 2026-10-17. Registry name: io.github.compiler-explorer/compiler-explorer. Source: https://github.com/compiler-explorer/compiler-explorer.

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