MCP Server for Snowflake
A Model Context Protocol (MCP) server for performing read-only operations against Snowflake databases. This tool enables Claude to securely query Snowflake data without modifying any information.
Features
- Secure connection to Snowflake using service account authentication with private key
- MCP-compatible handlers for querying Snowflake data
- Read-only operations with security checks to prevent data modification
- Support for Python 3.12+
- Stdio-based MCP server for easy integration with Claude Desktop
Available Tools
The server provides the following tools for querying Snowflake:
- list_databases : List all accessible Snowflake databases
- list_views : List all views in a specified database and schema
- describe_view : Get detailed information about a specific view including columns and SQL definition
- query_view : Query data from a view with an optional row limit
- execute_query : Execute custom read-only SQL queries (SELECT only) with results formatted as markdown tables
Installation
Prerequisites
- Python 3.12 or higher
- A Snowflake account with a configured service account (username + private key)
- uv package manager (recommended)
Steps
Clone this repository:
git clone https://github.com/yourusername/mcp-server-snowflake.git
cd mcp-server-snowflake
Install the package:
uv pip install -e .
Create a .env file based on .env.example with your Snowflake credentials:
SNOWFLAKE_ACCOUNT=youraccount.region
SNOWFLAKE_USER=your_service_account_username
SNOWFLAKE_PRIVATE_KEY_PATH=/absolute/path/to/your/rsa_key.p8
SNOWFLAKE_WAREHOUSE=your_warehouse
SNOWFLAKE_DATABASE=your_database
SNOWFLAKE_SCHEMA=your_schema
SNOWFLAKE_ROLE=your_role
Usage
Running with uv
After installing the package, you can run the server directly with:
uv run snowflake-mcp
This will start the stdio-based MCP server, which can be connected to Claude Desktop or any MCP client that supports stdio communication.
Claude Desktop Integration
In Claude Desktop, go to Settings → MCP Servers
Add a new server with the full path to your uv executable:
"snowflake-mcp-server": {
"command": "uv",
"args": [
"--directory",
"//mcp-server-snowflake",
"run",
"snowflake-mcp"
]
}
- You can find your uv path by running
which uv in your terminal
- Save the server configuration
Example Queries
When using with Claude, you can ask questions like:
- "Can you list all the databases in my Snowflake account?"
- "List all views in the MARKETING database"
- "Describe the structure of the CUSTOMER_ANALYTICS view in the SALES database"
- "Show me sample data from the REVENUE_BY_REGION view in the FINANCE database"
- "Run this SQL query: SELECT customer_id, SUM(order_total) as total_spend FROM SALES.ORDERS GROUP BY customer_id ORDER BY total_spend DESC LIMIT 10"
- "Query the MARKETING database to find the top 5 performing campaigns by conversion rate"
Security Considerations
This server:
- Enforces read-only operations (only SELECT statements are allowed)
- Automatically adds LIMIT clauses to prevent large result sets
- Uses service account authentication for secure connections
- Validates inputs to prevent SQL injection
⚠️ Important : Keep your .env file secure and never commit it to version control. The .gitignore file is configured to exclude it.
Development
Static Type Checking
mypy mcp_server_snowflake/
Linting
ruff check .
Formatting
ruff format .
Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
Technical Details
This project uses:
