A lightweight MCP (Model Context Protocol) server for ODBC built with FastAPI, pyodbc, and SQLAlchemy. This server is compatible with Virtuoso DBMS and other DBMS backends that implement a SQLAlchemy provider.
- Get Schemas: Fetch and list all schema names from the connected database.
- Get Tables: Retrieve table information for specific schemas or all schemas.
- Describe Table: Generate a detailed description of table structures, including:
- Column names and data types
- Nullable attributes
- Primary and foreign keys
- Search Tables: Filter and retrieve tables based on name substrings.
- Execute Stored Procedures: In the case of Virtuoso, execute stored procedures and retrieve results.
- Execute Queries:
- JSONL result format: Optimized for structured responses.
- Markdown table format: Ideal for reporting and visualization.
-
Install uv:
pip install uv
Or use Homebrew:
brew install uv
-
ODBC DSN Setup: Configure your ODBC Data Source Name (
~/.odbc.ini) for the target database. Example for Virtuoso DBMS:[VOS] Description = OpenLink Virtuoso Driver = /path/to/virtodbcu_r.so Database = Demo Address = localhost:1111 WideAsUTF16 = Yes -
SQLAlchemy URL Binding: Use the format:
virtuoso+pyodbc://user:password@VOS
Clone this repository:
git clone https://github.com/OpenLinkSoftware/mcp-sqlalchemy-server.gitFor Claude Desktop users: Add the following to claude_desktop_config.json:
{ "mcpServers": { "my_database": { "command": "uv", "args": ["--directory", "/path/to/mcp-sqlalchemy-server", "run", "mcp-sqlalchemy-server"], "env": { "DB_URL": "virtuoso+pyodbc://user:password@VOS" } } } }Here are the pyodbc URL examples for connecting to DBMS systems that have been tested using this mcp-server.
| Database | URL Format |
|---|---|
| Virtuoso DBMS | virtuoso+pyodbc://user:password@ODBC_DSN |
| PostgreSQL | postgresql://user:password@localhost/dbname |
| MySQL | mysql+pymysql://user:password@localhost/dbname |
| SQLite | sqlite:///path/to/database.db |
| Once connected, you can interact with your WhatsApp contacts through Claude, leveraging Claude's AI capabilities in your WhatsApp conversations. |
| name | description |
|---|---|
| get_qualifiers | Retrieve and return a list of all database qualifier for the connected DBMS |
| get_schemas | Retrieve and return a list of all schema names from the connected database. |
| get_tables | Retrieve and return a list containing information about tables whose names contain the substring 'q' in the format [{'schema': 'schema_name', 'table': 'table_name'}, {'schema': 'schema_name', 'table': 'table_name'}]. |
| describe_table | Retrieve and return a dictionary containing the definition of a table, including column names, data types, nullable, autoincrement, primary key, and foreign keys |
| filter_table_names | Retrieve and return a list containing information about tables whose names contain the substring 'q' in the format [{'schema': 'schema_name', 'table': 'table_name'}, {'schema': 'schema_name', 'table': 'table_name'}]. |
| query_database | Execute a SQL query and return results in JSONL format. |
| execute_query | Execute a SQL query and return results in JSONL format. |
| execute_query_md | Execute a SQL query and return results in Markdown table format. |
| spasql_query | Execute a SPASQL query and return results. |
| sparql_query | Execute a SPARQL query and return results. |
| virtuoso_support_ai | Interact with the Virtuoso Support Assistant/Agent -- a Virtuoso-specific feature for interacting with LLMs |
For easier troubleshooting:
-
Install the MCP Inspector:
npm install -g @modelcontextprotocol/inspector
-
Start the inspector:
npx @modelcontextprotocol/inspector uv --directory /path/to/mcp-sqlalchemy-server run mcp-sqlalchemy-server
Access the provided URL to troubleshoot server interactions.