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MCP server / Casey Hand

Filesystem (cyanheads) MCP Server for Codex

A Model Context Protocol (MCP) server for platform-agnostic file capabilities, including advanced search/replace and directory tree traversal.

Docs reviewedChecked 2026-09-20Runtime not tested

What it adds

A Model Context Protocol (MCP) server for platform-agnostic file capabilities, including advanced search/replace and directory tree traversal

aifilesystemllm-agentsmodel-context-protocolcyanheads

Get set up

  1. Run the install command below to register the server with Codex.
  2. Restart Codex or start a new thread so the tools load.
Read the installation source

Before you install

  • MCP_AUTH_SECRET_KEY
  • OPENROUTER_APP_URL
  • OPENROUTER_API_KEY
  • GEMINI_API_KEY
  • OAUTH_PROXY_AUTHORIZATION_URL

Compatibility & limitations

Documented for ChatGPT desktop app, Codex CLI, Codex IDE extension

Cursor: Not confirmed for Cursor.

    This listing is based on source documentation. We have not installed or runtime-tested this asset.

    How it fits together

    Subagent Driven Development · SkillUse when executing implementation plans with independent tasks in the current session.Finishing a Development Branch · SkillUse when implementation is complete, all tests pass, and you need to decide how to integrate the work.Fetch · MCP serverA Model Context Protocol server that provides web content fetching capabilities.Filesystem · MCP serverNode.js server implementing Model Context Protocol (MCP) for filesystem operations.Memory · MCP serverA basic implementation of persistent memory using a local knowledge graph. This lets Claude remember information about the user across chats.Sequentialthinking · MCP serverAn MCP server implementation that provides a tool for dynamic and reflective problem-solving through a structured thinking process.

    Sources & provenance

    Reviewed 2026-09-20. Source revision: main (mutable; commit not pinned).