BESSER
Model-context-protocol server implementation for BESSER
What is BESSER?
BESSER is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to model-context-protocol server implementation for besser
Model-context-protocol server implementation for BESSER
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- Model-context-protocol server implementation for BESSER
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx besser-mcp-serverConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use BESSER
The BESSER MCP Server exposes the BESSER (Better Engineering for Software and Systems Requiring Evolution and Reliability) low-code modeling framework through the Model Context Protocol. It provides tools for creating domain models, adding classes, methods, attributes, associations, enumerations, and OCL constraints, then generating production code in SQL, Python, Java, REST API, Pydantic, SQLAlchemy, RDF, and more — all through natural language conversation.
Prerequisites
- Python 3.10+ with pip or uv package manager installed
- Claude Desktop, Cursor IDE, or Cline (VS Code extension) as your MCP client
- Basic familiarity with object-oriented modeling concepts (classes, associations, enumerations)
- Git to clone the repository for development installation
Install BESSER MCP Server via pip
Install both the mcp library and the besser framework. The BESSER MCP Server depends on both packages. Use a virtual environment to keep your Python environment clean.
python -m venv .venv
source .venv/bin/activate
pip install mcp besser
# Or with uv:
uv add mcp besserStart the MCP server
Run the BESSER MCP server. By default it starts in local mode using SSE transport on port 8000. Use the --dist flag to enable collaborative/multi-user mode, and --port to change the port.
# Local mode (default)
python -m besser_mcp_server.server
# Custom port
python -m besser_mcp_server.server --port 9000
# Collaborative (distant) mode
python -m besser_mcp_server.server --dist --port 8000
# Development mode with MCP inspector
mcp dev src/besser_mcp_server/server.pyVerify the server is running
The server listens at http://127.0.0.1:8000/sse once started. You can test the connection by sending a simple request or by checking the inspector UI in development mode.
# Check the SSE endpoint is reachable
curl -N http://127.0.0.1:8000/sseAdd the server to your MCP client
Register the BESSER MCP server in your AI client configuration. Claude Desktop, Cursor, and Cline all use the SSE URL http://127.0.0.1:8000/sse to connect. The server must be running before you open the client.
Create your first domain model
With the server running and your client connected, start a conversation to build a domain model. Ask Claude to create a model, add classes with attributes, define associations, and then generate code in your target language.
BESSER Examples
Client configuration
Configuration for Claude Desktop connecting to the BESSER MCP server over SSE. The server must already be running at port 8000 before Claude Desktop starts.
{
"mcpServers": {
"besser-mcp": {
"type": "sse",
"url": "http://127.0.0.1:8000/sse"
}
}
}Prompts to try
Natural language prompts to build and generate from a BESSER domain model using the available creation, modification, and generation tools.
- "What is BESSER and what can you model with it?"
- "Create a new domain model called 'LibrarySystem'"
- "Add a class named 'Book' with attributes title (String) and isbn (String)"
- "Add a class 'Member' and create a binary association with 'Book' called 'borrows'"
- "Add an enumeration 'BookStatus' with literals Available, Borrowed, Reserved"
- "Generate Python classes from the current domain model"
- "Generate a REST API from the LibrarySystem model"Troubleshooting BESSER
SSE connection refused at http://127.0.0.1:8000/sse
Ensure the BESSER MCP server process is running before opening your AI client. Run `python -m besser_mcp_server.server` in a terminal and leave it running. The server does not start automatically — it must be started manually each session.
ImportError: No module named 'besser' or 'mcp'
Install both required packages: `pip install mcp besser`. If you are using a virtual environment, make sure it is activated before running the server. Check with `pip list | grep -E 'mcp|besser'`.
Code generation tool returns an error or empty output
A model must exist before generation tools can run. First use new_model to create a model, then add at least one class with add_class before calling sql_generation, python_generation, or other generation tools. Use get_model_info to inspect the current model state.
Frequently Asked Questions about BESSER
What is BESSER?
BESSER is a Model Context Protocol (MCP) server that model-context-protocol server implementation for besser It connects AI assistants to external tools and data sources through a standardized interface.
How do I install BESSER?
Follow the installation instructions on the BESSER GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with BESSER?
BESSER works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is BESSER free to use?
Yes, BESSER is open source and available under the MIT license. You can use it freely in both personal and commercial projects.
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Set Up BESSER in Your Editor
Choose your AI client for step-by-step setup instructions.
Quick Config Preview
Add this to your claude_desktop_config.json or .cursor/mcp.json
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