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Local Memory Hub MCP Server with stdio transport for ZenCoder and MCP clients

Project description

Memory Hub MCP Server (UV/UVX)

A local memory hub for AI agents with MCP integration, designed for ZenCoder and other MCP clients using stdio transport.

Quick Start with UVX

Installation & Usage

# Install and run directly with uvx
uvx memory-hub-mcp

# Or install locally first
uv pip install memory-hub-mcp
memory-hub-mcp

For ZenCoder Integration

In ZenCoder's custom MCP server configuration, you must now provide the URLs for the dependent services (Qdrant and LM Studio).

Command: uvx

Arguments:

[
    "memory-hub-mcp",
    "--qdrant-url",
    "http://<ip_address_of_qdrant>:6333",
    "--lm-studio-url",
    "http://<ip_address_of_lm_studio>:1234/v1"
]

Note: Replace <ip_address_...> with the actual IP addresses where your services are running. If they are on the same machine, the IP will be the same for both.

Development Setup

# Clone and setup
git clone <your-repo>
cd memory-hub
uv venv
source .venv/bin/activate
uv pip install -e .

# Run in development
memory-hub-mcp --log-level DEBUG --qdrant-url http://localhost:6333 --lm-studio-url http://localhost:1234/v1

Publishing to PyPI

To publish a new version of the package to PyPI:

  1. Update the Version: Increment the version number in pyproject.toml. PyPI does not allow re-uploading the same version.

    # pyproject.toml
    [project]
    name = "memory-hub-mcp"
    version = "0.1.2" # Increment this
    
  2. Clean and Rebuild: Remove old builds and create the new distributions.

    rm -rf dist/
    uv build
    
  3. Publish with an API Token:

    The recommended way to publish is to use a PyPI API token. You can provide it directly to the command via an environment variable for security.

    # Replace <your_pypi_token> with your actual token
    UV_PUBLISH_TOKEN=<your_pypi_token> uv publish dist/*
    

Available Tools

  • add_memory: Store content with hierarchical metadata (app_id, project_id, ticket_id)
  • search_memories: Semantic search with keyword enhancement and LLM synthesis
  • get_project_memories: Retrieve ALL memories for a specific app_id/project_id without search queries
  • update_memory: Update existing memories with automatic version incrementing
  • get_recent_memories: Retrieve memories from the last N hours (perfect for resuming work)
  • list_app_ids: List all application IDs
  • list_project_ids: List all project IDs
  • list_ticket_ids: List all ticket IDs
  • list_memory_types: List memory types currently in use (with counts and metadata)
  • get_memory_type_guide: Get the recommended memory type conventions
  • health_check: Server health status

Configuration

The server expects:

  • Qdrant: Vector database running (see docker-compose.yml)
  • LM Studio: For embeddings and chat completions
  • Environment: Standard .env configuration

Key File & Directory Locations

  • pyproject.toml: Defines project metadata, dependencies, and the memory-hub-mcp script entry point.
  • src/memory_hub/: The main Python package source code.
  • src/memory_hub/cli.py: The command-line interface logic that launches the server.
  • src/memory_hub/mcp_server.py: Core stdio server implementation and tool registration.
  • src/memory_hub/core/handlers/: Contains the implementation for each MCP tool (e.g., add_memory, search_memories).
  • src/memory_hub/core/services.py: Handles communication with external services like Qdrant and LM Studio.
  • src/memory_hub/core/models.py: Pydantic models defining the data structures used throughout the application.
  • docker-compose.yml: Defines the Qdrant service dependency.

Architecture

  • stdio transport: Direct MCP protocol communication
  • No HTTP dependencies: Lightweight, focused on MCP clients
  • Hierarchical memory: Flexible app/project/ticket organization
  • Hybrid search: Vector similarity + keyword matching + LLM synthesis
  • Version management: Automatic versioning for memory updates
  • Time-based retrieval: Query recent memories by hours

Agent Usage Guide

Saving Agent Progress

# Save initial work
add_memory(
    content="Implemented user authentication with JWT tokens...",
    metadata={
        "app_id": "eatzos",
        "project_id": "next",
        "type": "feature_implementation"
    }
)

# Update existing memory
update_memory(
    app_id="eatzos",
    project_id="next", 
    memory_type="feature_implementation",
    new_content="Completed authentication with JWT tokens and added refresh token logic..."
)

Resuming Agent Work

# Get ALL context for a project (no search guessing!)
get_project_memories(
    app_id="eatzos",
    project_id="next",
    limit=50
)

# See what changed recently
get_recent_memories(
    app_id="eatzos",
    hours=24,
    include_summary=True
)

Differences from HTTP Version

This UV/UVX version:

  • ✅ Uses stdio transport (ZenCoder compatible)
  • ✅ No FastAPI dependencies
  • ✅ Lightweight packaging
  • ✅ Direct MCP protocol
  • ❌ No web interface
  • ❌ No HTTP endpoints

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