Memory Bank MCP Server

Fork Notice: This is a fork of the original memory-bank-mcp by Aliosh Pimenta, enhanced with MongoDB-native features and real-time statistics tracking.

A modern Model Context Protocol (MCP) server implementation for MongoDB-powered memory bank management.

Key Features

• 🗄️ MongoDB-powered storage with advanced indexing and search capabilities
• 🏢 Multi-project isolation with automatic project management
• 📊 Real-time statistics tracking for all projects and files
• 🔒 Type-safe operations with Zod validation and error handling
• 🔀 Smart merge functionality with automatic cleanup
• 🚀 Optimized MCP protocol implementation

Prerequisites

• MongoDB Server running locally or remotely (MongoDB 4.4+ recommended)
• Node.js 18+ for running the MCP server
• An MCP-compatible client (Claude Desktop, Cline, Cursor, etc.)

Installation

NPM Installation (Recommended)

npm install -g memory-bank-mcp-mongodb

Manual Installation

git clone https://github.com/Sato-Isolated/memory-mongo-bank-mcp.git
cd memory-mongo-bank-mcp
pnpm install
pnpm run build

Quick Start

1. Start MongoDB:

   # Windows (if installed as service)
   net start MongoDB
   
   # macOS/Linux
   mongod
   
   # Or use Docker
   docker run -d -p 27017:27017 mongo:latest

2. Configure your MCP client (see Configuration section below)

Configuration

Environment Variables

• MONGODB_URL (required): MongoDB connection string (e.g., mongodb://localhost:27017)
• MONGODB_DB (optional): MongoDB database name (defaults to memory_bank)

MCP Client Configuration

VS Code with MCP Extension:

{
  "mcp": {
    "servers": {
      "memory-bank-mongo": {
        "command": "npx",
        "args": ["-y", "memory-bank-mcp-mongodb"],
        "env": {
          "MONGODB_URL": "mongodb://localhost:27017",
          "MONGODB_DB": "memory_bank"
        }
      }
    }
  }
}

Claude Desktop, Cline, Cursor:

{
  "memory-bank": {
    "command": "npx",
    "args": ["-y", "memory-bank-mcp-mongodb"],
    "env": {
      "MONGODB_URL": "mongodb://localhost:27017",
      "MONGODB_DB": "memory_bank"
    }
  }
}

Cursor (Alternative):

env MONGODB_URL=mongodb://localhost:27017 MONGODB_DB=memory_bank npx -y memory-bank-mcp-mongodb

Documentation

This project uses distributed documentation to help you navigate different sections:

📚 Architecture & Code Structure

• Source Code Overview - Architecture patterns and project structure
• Domain Layer - Business entities and core logic
• Data Layer - Repository patterns and use cases
• Presentation Layer - Controllers and API endpoints
• Infrastructure - Database and external services

Available Tools

🎯 Priority Tools (Start Here)

📋 list_projects

[PRIORITY 1 - START HERE] List all projects in the memory bank. ALWAYS use this first to discover available projects before any other operation. Essential for understanding workspace structure.

📁 list_project_files

[PRIORITY 2 - EXPLORE] List all files within a specific project. Use after list_projects to discover what files exist before reading them. Critical for understanding project content.

📖 memory_bank_read

[PRIORITY 3 - READ] Read a memory bank file for a specific project. Primary method to access file content. Use after list_project_files to read specific files.

🔍 memory_bank_search

[HIGH PRIORITY - SEARCH] Search for files containing specific text within a project. Essential for finding relevant files when you don't know exact filenames.

📝 File Management Tools

✏️ memory_bank_write

[CREATE NEW] Create a new memory bank file for a specific project. Use when you need to create brand new files.

🔄 memory_bank_update

[MODIFY EXISTING] Update an existing memory bank file for a specific project. Automatically creates version history.

🔀 memory_bank_merge

[COMPREHENSIVE VIEW] Merge all files from a project into a single formatted document. Excellent for understanding full project context.

🏷️ memory_bank_get_files_by_tags

[SMART FILTER] Find files in a project by their tags. Helpful when you know the type of content you're looking for but not exact filenames.

📊 memory_bank_get_project_stats

[PROJECT OVERVIEW] Get statistics for a project including file count and total size. Use to understand project scope and scale.

🗑️ Deletion Tools (Use with Caution)

🗑️ memory_bank_delete_file

[CAREFUL - DELETE FILE] Delete a specific file from a project. ⚠️ WARNING: This action is permanent and cannot be undone.

💥 memory_bank_delete_project

[DANGER - DELETE PROJECT] Delete an entire project and all its files. ⚠️ EXTREME CAUTION: This action is permanent and cannot be undone.

📚 Version Control Tools

📚 memory_bank_version_history

[VERSION HISTORY] Get complete version history for a specific file. Shows all previous versions with metadata and timestamps.

📄 memory_bank_read_version

[READ SPECIFIC VERSION] Read the content of a specific file version. Use to view historical content of a particular version.

⏪ memory_bank_revert_file_to_version

[RESTORE PREVIOUS VERSION] Restore a file to a previous version. Creates a new version with the old content for safety.

🔍 memory_bank_compare_versions

[COMPARE VERSIONS] Compare two versions of a file to see differences. Use to understand what changed between versions.

🧹 memory_bank_cleanup_old_versions

[MAINTENANCE] Clean up old file versions to save storage space. Keeps recent versions and removes older ones.

🚀 Project Template Tools

📋 memory_bank_get_project_templates

[TEMPLATE DISCOVERY] List available project templates. Essential when starting new projects from predefined structures.

🚀 memory_bank_create_project_from_template

[RAPID PROJECT CREATION] Create a new project using a template. Fastest way to start structured projects.

⚡ memory_bank_install_predefined_templates

[FIRST-TIME SETUP] Install built-in project templates. Run this ONCE when first using the system to add default templates.

MongoDB Setup Examples

Local MongoDB:

MONGODB_URL=mongodb://localhost:27017
MONGODB_DB=memory_bank

MongoDB Atlas (Cloud):

MONGODB_URL=mongodb+srv://username:[email protected]
MONGODB_DB=memory_bank

Troubleshooting

"Failed to connect to MongoDB"

• Ensure MongoDB is running on the specified port
• Check network connectivity and firewall settings
• Verify connection string format and credentials

"MONGODB_URL environment variable is required"

• Set the required environment variables in your MCP client configuration
• Verify the environment variables are properly formatted

Tools not appearing in AI client

• Restart your AI client after configuration changes
• Check that the package is properly installed
• Review client logs for connection errors

License

MIT License - see the LICENSE file for details.

Links

• NPM Package: https://www.npmjs.com/package/memory-bank-mcp-mongodb
• GitHub Repository: https://github.com/Sato-Isolated/memory-mongo-bank-mcp
• Original Project: https://github.com/alioshr/memory-bank-mcp

A modern, MongoDB-powered memory bank solution for AI assistants and development workflows.