What are the runtime dependencies?

Node.js is required. Install dependencies with `npm install` and build with `npm run build`. The server runs as a Node process.

Where does Atomic Writer MCP Server store data?

All managed files, journals, locks, trash, and temporary files reside under a user‑specified base directory, inside a `.atomic-writer` subdirectory with standard folders (`files`, `journal`, `locks`, `trash`, `temp`).

What credentials does it need?

It reads `INVALID_PATH` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Atomic Writer MCP Server

🔒 Atomic Writer MCP Server: A secure file operation service that prevents data loss through atomic transactions. Built for AI integrations

Local serverstdioTypeScript

What is the Atomic Writer MCP Server?

🔒 Atomic Writer MCP Server: A secure file operation service that prevents data loss through atomic transactions. Built for AI integrations, collaborative editing

What you get

A secure and atomic file operation service implemented as an MCP (Model Context Protocol) server. This server provides safe, transactional file operations through the MCP protocol.

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
verify-integrity	Check file integrity and initialize tracking for external files
get-status	Get system status
recover-file	Recover from journal
get-file-history	View operation history
get-lock-status	Check file locks
force-release-lock	Release stuck locks
rollback-operation	Rollback changes

How to install the Atomic Writer MCP Server

{
  "mcpServers": {
    "atomic-writer": {
      "command": "node",
      "args": [
        "/absolute/path/to/atomic-writer/build/index.js",
        "/absolute/path/to/base/directory"
      ]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

Variable	Description	Required
INVALID_PATH	Filesystem location the server is allowed to use.	Optional

Example prompts to try

“Use Atomic Writer to verify-integrity.”
“Use Atomic Writer to get-status.”
“Use Atomic Writer to recover-file.”

Frequently asked questions

It prevents destructive operations by design: new content can only be appended, never overwritten; files can only be created if they don’t exist and are empty; all operations are tracked and rollback‑able.