Claude Code Explorer MCP
The full source code of Anthropic's Claude Code CLI, leaked on March 31, 2026. Its 13 documented tools cover source, tools, tool, command. It runs locally over stdio via the published package.
People connecting developer tools tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.
VERIFIED ACTIVE
LAST COMMIT 2026-04-22 · ★ 3,263 · #70 OF 139 MAINTAINED DEVELOPER TOOLS · VERIFIED 2026-08-25
NOASSERTION · TypeScript servers · how we verify → /methodology
01 · Install Claude Code Explorer MCP
before you install - you'll need
Set CLAUDE_CODE_SRC_ROOT before connecting.
Claude Code
claude mcp add codeaashu-claude-code -- npx -y @divyesh2000/codemasterClaude Desktop / Cursor / VS Code - add to config
{
"mcpServers": {
"codeaashu-claude-code": {
"command": "npx",
"args": [
"-y",
"@divyesh2000/codemaster"
]
}
}
}Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.
Using another client? Same JSON, different key
Claude Desktop · mcpServers
Cursor · mcpServers
VS Code · servers
Windsurf · mcpServers
Zed · context_servers
Cline · mcpServers
Roo Code · mcpServers
Continue · mcpServers
LibreChat · mcpServers
Gemini CLI · mcpServers
Codex CLI · mcp_servers
Full setup guides: every client.
02 · Evidence
Security posture
What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.
runs as local process (stdio) - runs on your machine with your user's permissions
license no standard license detected - usage rights unclear; check the repo before commercial use
npm package @divyesh2000/codemaster - the @divyesh2000 scope differs from the repo owner (codeaashu); confirm it's the project's official package
registry registry publisher io.github.divu2025 is not the repo owner (codeaashu) - the registry entry was published by someone else
03 · What Claude Code Explorer MCP can do
Prose above is summarized from the project's README and registry record - no invented capabilities.
What you can build
With this server connected, an agent can list all ~40 agent tools with source files, list all ~50 slash commands with source files, read full source of any tool (e.g. BashTool, FileEditTool), and read source of any slash command (e.g. review, mcp).
Capability map
Tools grouped from the project's README - what Claude Code Explorer MCP lets an agent do.
Source
4 tools - e.g. Read full source of any tool (e.g. BashTool, FileEditTool); Read source of any slash command (e.g. review, mcp); Read any file from src/ by path
get_tool_source · get_command_source · read_source_file · search_source
read & search
3 tools - e.g. List all ~40 agent tools with source files; List all ~50 slash commands with source files; Browse src/ directories
list_tools · list_commands · list_directory
Architecture
2 tools - e.g. High-level architecture overview; Guided tour of the full architecture
get_architecture · architecture_overview
Explain
2 tools - e.g. Deep-dive into how a specific tool works; Understand a slash command's implementation
explain_tool · explain_command
How
1 tool - e.g. Explain any subsystem (permissions, MCP, bridge, etc.)
how_does_it_work
Compare
1 tool - e.g. Side-by-side comparison of two tools
compare_tools
04 · Who maintains Claude Code Explorer MCP
Claude Code Explorer MCP is maintained by codeaashu. It's the only MCP server we track from this author; the repo dates to Mar 2026.
05 · Facts
- repository
- github.com/codeaashu/claude-code
- category
- developer tools - ranked #70 of 139 actively-maintained developer tools servers as of 2026-08-25.
- registry
- io.github.divu2025/codemaster (active, first published 2026-04-23)
- packages
- npm:@divyesh2000/codemaster
06 · Claude Code Explorer MCP FAQ
Is Claude Code Explorer MCP still maintained?
Yes - as of 2026-08-25, its last commit was 2026-04-22. We re-verify nightly.
What can Claude Code Explorer MCP do?
With this server connected, an agent can list all ~40 agent tools with source files, list all ~50 slash commands with source files, read full source of any tool (e.g. BashTool, FileEditTool), and read source of any slash command (e.g. review, mcp).
How do I install Claude Code Explorer MCP?
Run `npx -y @divyesh2000/codemaster`. The README documents one environment variable (CLAUDE_CODE_SRC_ROOT) to set first. Set CLAUDE_CODE_SRC_ROOT before connecting. You can also paste the ready-made client config above.
Does Claude Code Explorer MCP run locally?
Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.
07 · Alternatives to Claude Code Explorer MCP
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