Show HN: MCP server that compresses and serves MySQL schema data

This is a Model Context Protocol (MCP) server that provides compressed schema information for MySQL databases. This MCP server is useful when the schema dump file does not fit in the context size because you are using a large database schema.

• List Tables (list_tables)
  • Lists all table information in the specified database. Includes table name, comment, primary key, unique key, and foreign key information.
  • Parameters
    • dbName: The name of the database to retrieve information from (not required when DB_NAME environment variable is set)
• Describe Tables (describe_tables)
  • Displays detailed information for specific tables in the specified database. Provides formatted information such as column definitions, key constraints, and indexes.
  • Parameters
    • dbName: The name of the database to retrieve information from (not required when DB_NAME environment variable is set)
    • tableNames: An array of table names to retrieve detailed information for

1. Install the command

   go install github.com/shibayu36/mysql-schema-explorer-mcp@latest

2. Configure mcp.json

   { "mcpServers": { "mysql-schema-explorer-mcp": { "command": "/path/to/mysql-schema-explorer-mcp", "env": { "DB_HOST": "127.0.0.1", "DB_PORT": "3306", "DB_USER": "root", "DB_PASSWORD": "root" }, } } }

3. Execute SQL generation using the agent

   Example: Using the structure of the ecshop database, list the names of the 3 most recently ordered products by the user shibayu36.

When accessing only one database, you can set the DB_NAME environment variable to avoid specifying the database name each time.