MCP Alchemy connects Claude Desktop directly to your databases, allowing it to help explore database structure, assist with SQL queries, display table relationships, and analyze large datasets. It works with PostgreSQL, MySQL, MariaDB, SQLite, Oracle, MS SQL Server, CrateDB, and other SQLAlchemy-compatible databases.
Ensure you have uv installed:
# Install uv if you haven't already
curl -LsSf https://astral.sh/uv/install.sh | sh
Add MCP Alchemy to your claude_desktop_config.json
file. You'll need to specify the appropriate database driver in the --with
parameter.
{
"mcpServers": {
"my_sqlite_db": {
"command": "uvx",
"args": ["--from", "mcp-alchemy==2025.5.2.210242",
"--refresh-package", "mcp-alchemy", "mcp-alchemy"],
"env": {
"DB_URL": "sqlite:////absolute/path/to/database.db"
}
}
}
}
{
"mcpServers": {
"my_postgres_db": {
"command": "uvx",
"args": ["--from", "mcp-alchemy==2025.5.2.210242", "--with", "psycopg2-binary",
"--refresh-package", "mcp-alchemy", "mcp-alchemy"],
"env": {
"DB_URL": "postgresql://user:password@localhost/dbname"
}
}
}
}
{
"mcpServers": {
"my_mysql_db": {
"command": "uvx",
"args": ["--from", "mcp-alchemy==2025.5.2.210242", "--with", "pymysql",
"--refresh-package", "mcp-alchemy", "mcp-alchemy"],
"env": {
"DB_URL": "mysql+pymysql://user:password@localhost/dbname"
}
}
}
}
{
"mcpServers": {
"my_mssql_db": {
"command": "uvx",
"args": ["--from", "mcp-alchemy==2025.5.2.210242", "--with", "pymssql",
"--refresh-package", "mcp-alchemy", "mcp-alchemy"],
"env": {
"DB_URL": "mssql+pymssql://user:password@localhost/dbname"
}
}
}
}
{
"mcpServers": {
"my_oracle_db": {
"command": "uvx",
"args": ["--from", "mcp-alchemy==2025.5.2.210242", "--with", "cx_oracle",
"--refresh-package", "mcp-alchemy", "mcp-alchemy"],
"env": {
"DB_URL": "oracle+cx_oracle://user:password@localhost/dbname"
}
}
}
}
{
"mcpServers": {
"my_cratedb": {
"command": "uvx",
"args": ["--from", "mcp-alchemy==2025.5.2.210242", "--with", "sqlalchemy-cratedb>=0.42.0.dev1",
"--refresh-package", "mcp-alchemy", "mcp-alchemy"],
"env": {
"DB_URL": "crate://user:password@localhost:4200/?schema=testdrive"
}
}
}
}
For connecting to CrateDB Cloud, use a URL like crate://user:[email protected]:4200?ssl=true
.
DB_URL
: SQLAlchemy database URL (required)CLAUDE_LOCAL_FILES_PATH
: Directory for full result sets (optional)EXECUTE_QUERY_MAX_CHARS
: Maximum output length (optional, default 4000)Returns all table names in the database as a comma-separated list.
users, orders, products, categories
Finds tables matching a substring.
Input: q
(string)
Returns matching table names:
Input: "user"
Returns: "users, user_roles, user_permissions"
Gets detailed schema for specified tables.
Input: table_names
(string[])
Returns table definitions including column details and relationships:
users:
id: INTEGER, primary key, autoincrement
email: VARCHAR(255), nullable
created_at: DATETIME
Relationships:
id -> orders.user_id
Executes SQL query with vertical output format.
Inputs:
query
(string): SQL queryparams
(object, optional): Query parametersReturns results in clean vertical format:
1. row
id: 123
name: John Doe
created_at: 2024-03-15T14:30:00
email: NULL
Result: 1 rows
Features:
When claude-local-files is configured:
The integration automatically activates when CLAUDE_LOCAL_FILES_PATH
is set.
There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json
file so that it is available in all of your projects.
If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json
file.
To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".
When you click that button the ~/.cursor/mcp.json
file will be opened and you can add your server like this:
{
"mcpServers": {
"cursor-rules-mcp": {
"command": "npx",
"args": [
"-y",
"cursor-rules-mcp"
]
}
}
}
To add an MCP server to a project you can create a new .cursor/mcp.json
file or add it to the existing one. This will look exactly the same as the global MCP server example above.
Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.
The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.
You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.