mcp -file-modifier

This MCP server provides file modification capabilities accessible via MCP. It allows AI assistants to perform edits on text files by adding content at a specific line, replacing existing content, or deleting content that matches a target. It supports UTF-8 encoded files, enabling reliable handling of various languages and characters. To use it, run the server locally and connect to its MCP endpoints using the supported operations: add, replace, and delete. The server defaults to port 3000, so ensure your client is pointed to http://localhost:3000 (or the configured port) to issue MCP commands. Once running, you can issue an add action to insert content at a given line, a replace action to swap out matching content, or a delete action to remove target content. The tool is designed to integrate with Claude or other AI assistants to streamline content modification workflows within codebases or text documents.

Prerequisites:

• Node.js and npm installed on your system
• Access to a terminal or command prompt

Step-by-step:

1. Install the MCP server globally via npm: npm install -g mcp-server-file-modifier

2. Start the server: mcp-server-file-modifier

3. Verify the server is running by visiting http://localhost:3000 or checking the terminal output for a listening message.

4. Optional: configure environment variables or port if needed (PORT can be changed if your environment requires a different port).

Notes and tips:

• Default port is 3000; adjust PORT as needed via environment variables.
• Ensure target files are UTF-8 encoded to avoid character misinterpretation.
• The API supports three operations: add (insert at a specific line), replace (target-based replacement), and delete (target-based deletion).
• If running behind a firewall or proxy, ensure the MCP endpoints are accessible from your AI assistant integration.
• When integrating with automation, consider wrapping calls with error handling for scenarios where targets are not found or line numbers are out of range.
• Since the server is CLI-based, ensure the executable is in your system PATH when installed globally.