mcp-database-tools
MCP server providing SQL and database tools for AI agents. All analysis is performed on SQL text — no actual database connection required.
Tools
sql_format
Format and prettify SQL queries with proper indentation, uppercased keywords, and aligned columns. Supports MySQL, PostgreSQL, and SQLite syntax.
sql_explain
Take a SQL query and explain what it does in plain English, step by step. Identifies query type, tables, columns, conditions, and provides optimization tips.
schema_analyze
Parse CREATE TABLE statements to extract tables, columns, types, constraints, foreign keys, and indexes. Generates an ER diagram in Mermaid format.
query_build
Build SQL queries from natural language descriptions. Supports common patterns like filtering by date, aggregation, joins, ordering, and pagination.
migration_generate
Compare two schemas (old vs new CREATE TABLE statements) and generate ALTER TABLE migration statements. Produces both up (forward) and down (rollback) migrations.
Installation
npm install
npm run build
Usage
With Claude Desktop
Add to your Claude Desktop config (claude_desktop_config.json):
{
"mcpServers": {
"database-tools": {
"command": "node",
"args": ["path/to/mcp-database-tools/dist/index.js"]
}
}
}
Standalone
npm start
Development
npm run build # Compile TypeScript
npm start # Run the server
License
MIT
