Add MySQL support to MCP Database Server

Updated package.json and package-lock.json to include MySQL dependencies. Enhanced README with MySQL usage instructions and configuration details. Modified index.ts to handle MySQL connection parameters and logging. Added MysqlAdapter for database interactions.

package-lock.json

@@ -11,6 +11,7 @@
             "dependencies": {
                 "@modelcontextprotocol/sdk": "1.9.0",
                 "mssql": "11.0.1",
+                "mysql2": "^3.14.1",
                 "pg": "^8.11.3",
                 "sqlite3": "5.1.7"
             },
@@ -639,6 +640,14 @@
                 "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
             }
         },
+        "node_modules/aws-ssl-profiles": {
+            "version": "1.1.2",
+            "resolved": "https://registry.npmjs.org/aws-ssl-profiles/-/aws-ssl-profiles-1.1.2.tgz",
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+            "engines": {
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@@ -1124,6 +1133,14 @@
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             "optional": true
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+        "node_modules/denque": {
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+            "resolved": "https://registry.npmjs.org/denque/-/denque-2.1.0.tgz",
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+            "engines": {
+                "node": ">=0.10"
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@@ -1645,6 +1662,14 @@
                 "node": ">=8"
             }
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+        "node_modules/generate-function": {
+            "version": "2.3.1",
+            "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.3.1.tgz",
+            "integrity": "sha512-eeB5GfMNeevm/GRYq20ShmsaGcmI81kIX2K9XQx5miC8KdHaC6Jm0qQ8ZNeGOi7wYB8OsdxKs+Y2oVuTFuVwKQ==",
+            "dependencies": {
+                "is-property": "^1.0.2"
+            }
+        },
         "node_modules/get-intrinsic": {
             "version": "1.3.0",
             "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.3.0.tgz",
@@ -2032,6 +2057,11 @@
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+        "node_modules/is-property": {
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/is-property/-/is-property-1.0.2.tgz",
+            "integrity": "sha512-Ks/IoX00TtClbGQr4TWXemAnktAQvYB7HzcCxDGqEZU6oCmb2INHuOoKxbtR+HFkmYWBKv/dOZtGRiAjDhj92g=="
+        },
         "node_modules/is-stream": {
             "version": "1.1.0",
             "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
@@ -2180,12 +2210,31 @@
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         },
+        "node_modules/long": {
+            "version": "5.3.2",
+            "resolved": "https://registry.npmjs.org/long/-/long-5.3.2.tgz",
+            "integrity": "sha512-mNAgZ1GmyNhD7AuqnTG3/VQ26o760+ZYBPKjPvugO8+nLbYfX6TVpJPseBvopbdY+qpZ/lKUnmEc1LeZYS3QAA=="
+        },
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             "dev": true
         },
+        "node_modules/lru.min": {
+            "version": "1.1.2",
+            "resolved": "https://registry.npmjs.org/lru.min/-/lru.min-1.1.2.tgz",
+            "integrity": "sha512-Nv9KddBcQSlQopmBHXSsZVY5xsdlZkdH/Iey0BlcBYggMd4two7cZnKOK9vmy3nY0O5RGH99z1PCeTpPqszUYg==",
+            "engines": {
+                "bun": ">=1.0.0",
+                "deno": ">=1.30.0",
+                "node": ">=8.0.0"
+            },
+            "funding": {
+                "type": "github",
+                "url": "https://github.com/sponsors/wellwelwel"
+            }
+        },
         "node_modules/make-fetch-happen": {
             "version": "9.1.0",
             "resolved": "https://registry.npmjs.org/make-fetch-happen/-/make-fetch-happen-9.1.0.tgz",
@@ -2545,6 +2594,44 @@
                 "node": ">=18"
             }
         },
+        "node_modules/mysql2": {
+            "version": "3.14.1",
+            "resolved": "https://registry.npmjs.org/mysql2/-/mysql2-3.14.1.tgz",
+            "integrity": "sha512-7ytuPQJjQB8TNAYX/H2yhL+iQOnIBjAMam361R7UAL0lOVXWjtdrmoL9HYKqKoLp/8UUTRcvo1QPvK9KL7wA8w==",
+            "dependencies": {
+                "aws-ssl-profiles": "^1.1.1",
+                "denque": "^2.1.0",
+                "generate-function": "^2.3.1",
+                "iconv-lite": "^0.6.3",
+                "long": "^5.2.1",
+                "lru.min": "^1.0.0",
+                "named-placeholders": "^1.1.3",
+                "seq-queue": "^0.0.5",
+                "sqlstring": "^2.3.2"
+            },
+            "engines": {
+                "node": ">= 8.0"
+            }
+        },
+        "node_modules/named-placeholders": {
+            "version": "1.1.3",
+            "resolved": "https://registry.npmjs.org/named-placeholders/-/named-placeholders-1.1.3.tgz",
+            "integrity": "sha512-eLoBxg6wE/rZkJPhU/xRX1WTpkFEwDJEN96oxFrTsqBdbT5ec295Q+CoHrL9IT0DipqKhmGcaZmwOt8OON5x1w==",
+            "dependencies": {
+                "lru-cache": "^7.14.1"
+            },
+            "engines": {
+                "node": ">=12.0.0"
+            }
+        },
+        "node_modules/named-placeholders/node_modules/lru-cache": {
+            "version": "7.18.3",
+            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-7.18.3.tgz",
+            "integrity": "sha512-jumlc0BIUrS3qJGgIkWZsyfAM7NCWiBcCDhnd+3NNM5KbBmLTgHVfWBcg6W+rLUsIpzpERPsvwUP7CckAQSOoA==",
+            "engines": {
+                "node": ">=12"
+            }
+        },
         "node_modules/napi-build-utils": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/napi-build-utils/-/napi-build-utils-2.0.0.tgz",
@@ -3413,6 +3500,11 @@
                 "node": ">= 18"
             }
         },
+        "node_modules/seq-queue": {
+            "version": "0.0.5",
+            "resolved": "https://registry.npmjs.org/seq-queue/-/seq-queue-0.0.5.tgz",
+            "integrity": "sha512-hr3Wtp/GZIc/6DAGPDcV4/9WoZhjrkXsi5B/07QgX8tsdc6ilr7BFM6PM6rbdAX1kFSDYeZGLipIZZKyQP0O5Q=="
+        },
         "node_modules/serve-static": {
             "version": "2.2.0",
             "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-2.2.0.tgz",
@@ -3688,6 +3780,14 @@
                 }
             }
         },
+        "node_modules/sqlstring": {
+            "version": "2.3.3",
+            "resolved": "https://registry.npmjs.org/sqlstring/-/sqlstring-2.3.3.tgz",
+            "integrity": "sha512-qC9iz2FlN7DQl3+wjwn3802RTyjCx7sDvfQEXchwa6CWOx07/WVfh91gBmQ9fahw8snwGEWU3xGzOt4tFyHLxg==",
+            "engines": {
+                "node": ">= 0.6"
+            }
+        },
         "node_modules/ssri": {
             "version": "8.0.1",
             "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",

package.json

@@ -25,6 +25,7 @@
     "dependencies": {
         "@modelcontextprotocol/sdk": "1.9.0",
         "mssql": "11.0.1",
+        "mysql2": "^3.14.1",
         "pg": "^8.11.3",
         "sqlite3": "5.1.7"
     },

readme.md

@@ -2,7 +2,7 @@
 
 # MCP Database Server
 
-This MCP (Model Context Protocol) server provides database access capabilities to Claude, supporting SQLite, SQL Server, and PostgreSQL databases.
+This MCP (Model Context Protocol) server provides database access capabilities to Claude, supporting SQLite, SQL Server, PostgreSQL, and MySQL databases.
 
 ## Installation
 
@@ -92,6 +92,25 @@ Optional parameters:
 - `--ssl`: Enable SSL connection (true/false)
 - `--connection-timeout`: Connection timeout in milliseconds (default: 30000)
 
+### MySQL Database
+
+To use with a MySQL database:
+
+```
+node dist/src/index.js --mysql --host <host-name> --database <database-name> [--user <username> --password <password>]
+```
+
+Required parameters:
+- `--host`: MySQL host name or IP address
+- `--database`: Name of the database
+
+Optional parameters:
+- `--user`: Username for MySQL authentication
+- `--password`: Password for MySQL authentication
+- `--port`: Port number (default: 3306)
+- `--ssl`: Enable SSL connection (true/false or object)
+- `--connection-timeout`: Connection timeout in milliseconds (default: 30000)
+
 ## Configuring Claude Desktop
 
 ### Direct Usage Configuration
@@ -132,6 +151,18 @@ If you installed the package globally, configure Claude Desktop with:
         "--user", "your-username",
         "--password", "your-password"
       ]
+    },
+    "mysql": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "@executeautomation/database-server",
+        "--mysql",
+        "--host", "your-host-name",
+        "--database", "your-database-name",
+        "--user", "your-username",
+        "--password", "your-password"
+      ]
     }
   }
 }
@@ -172,6 +203,17 @@ For local development, configure Claude Desktop to use your locally built versio
         "--user", "your-username",
         "--password", "your-password"
       ]
+    },
+    "mysql": {
+      "command": "node",
+      "args": [
+        "/absolute/path/to/mcp-database-server/dist/src/index.js",
+        "--mysql",
+        "--host", "your-host-name",
+        "--database", "your-database-name",
+        "--user", "your-username",
+        "--password", "your-password"
+      ]
     }
   }
 }

src/db/adapter.ts

@@ -54,6 +54,7 @@ export interface DbAdapter {
 import { SqliteAdapter } from './sqlite-adapter.js';
 import { SqlServerAdapter } from './sqlserver-adapter.js';
 import { PostgresqlAdapter } from './postgresql-adapter.js';
+import { MysqlAdapter } from './mysql-adapter.js';
 
 /**
  * Factory function to create the appropriate database adapter
@@ -72,6 +73,8 @@ export function createDbAdapter(type: string, connectionInfo: any): DbAdapter {
     case 'postgresql':
     case 'postgres':
       return new PostgresqlAdapter(connectionInfo);
+    case 'mysql':
+      return new MysqlAdapter(connectionInfo);
     default:
       throw new Error(`Unsupported database type: ${type}`);
   }

src/db/mysql-adapter.ts

@@ -0,0 +1,135 @@
+import { DbAdapter } from "./adapter.js";
+import mysql from "mysql2/promise";
+
+/**
+ * MySQL database adapter implementation
+ */
+export class MysqlAdapter implements DbAdapter {
+  private connection: mysql.Connection | null = null;
+  private config: mysql.ConnectionOptions;
+  private host: string;
+  private database: string;
+
+  constructor(connectionInfo: {
+    host: string;
+    database: string;
+    user?: string;
+    password?: string;
+    port?: number;
+    ssl?: boolean | object;
+    connectionTimeout?: number;
+  }) {
+    this.host = connectionInfo.host;
+    this.database = connectionInfo.database;
+    this.config = {
+      host: connectionInfo.host,
+      database: connectionInfo.database,
+      port: connectionInfo.port || 3306,
+      user: connectionInfo.user,
+      password: connectionInfo.password,
+      connectTimeout: connectionInfo.connectionTimeout || 30000,
+      multipleStatements: true,
+    };
+    if (typeof connectionInfo.ssl === 'object' || typeof connectionInfo.ssl === 'string') {
+      this.config.ssl = connectionInfo.ssl;
+    } else if (connectionInfo.ssl === true) {
+      this.config.ssl = {};
+    }
+  }
+
+  /**
+   * Initialize MySQL connection
+   */
+  async init(): Promise<void> {
+    try {
+      console.error(`[INFO] Connecting to MySQL: ${this.host}, Database: ${this.database}`);
+      this.connection = await mysql.createConnection(this.config);
+      console.error(`[INFO] MySQL connection established successfully`);
+    } catch (err) {
+      console.error(`[ERROR] MySQL connection error: ${(err as Error).message}`);
+      throw new Error(`Failed to connect to MySQL: ${(err as Error).message}`);
+    }
+  }
+
+  /**
+   * Execute a SQL query and get all results
+   */
+  async all(query: string, params: any[] = []): Promise<any[]> {
+    if (!this.connection) {
+      throw new Error("Database not initialized");
+    }
+    try {
+      const [rows] = await this.connection.execute(query, params);
+      return Array.isArray(rows) ? rows : [];
+    } catch (err) {
+      throw new Error(`MySQL query error: ${(err as Error).message}`);
+    }
+  }
+
+  /**
+   * Execute a SQL query that modifies data
+   */
+  async run(query: string, params: any[] = []): Promise<{ changes: number, lastID: number }> {
+    if (!this.connection) {
+      throw new Error("Database not initialized");
+    }
+    try {
+      const [result]: any = await this.connection.execute(query, params);
+      const changes = result.affectedRows || 0;
+      const lastID = result.insertId || 0;
+      return { changes, lastID };
+    } catch (err) {
+      throw new Error(`MySQL query error: ${(err as Error).message}`);
+    }
+  }
+
+  /**
+   * Execute multiple SQL statements
+   */
+  async exec(query: string): Promise<void> {
+    if (!this.connection) {
+      throw new Error("Database not initialized");
+    }
+    try {
+      await this.connection.query(query);
+    } catch (err) {
+      throw new Error(`MySQL batch error: ${(err as Error).message}`);
+    }
+  }
+
+  /**
+   * Close the database connection
+   */
+  async close(): Promise<void> {
+    if (this.connection) {
+      await this.connection.end();
+      this.connection = null;
+    }
+  }
+
+  /**
+   * Get database metadata
+   */
+  getMetadata(): { name: string; type: string; server: string; database: string } {
+    return {
+      name: "MySQL",
+      type: "mysql",
+      server: this.host,
+      database: this.database,
+    };
+  }
+
+  /**
+   * Get database-specific query for listing tables
+   */
+  getListTablesQuery(): string {
+    return "SHOW TABLES";
+  }
+
+  /**
+   * Get database-specific query for describing a table
+   */
+  getDescribeTableQuery(tableName: string): string {
+    return `DESCRIBE \`${tableName}\``;
+  }
+} 

src/index.ts

@@ -45,6 +45,7 @@ if (args.length === 0) {
   logger.error("Usage for SQLite: node index.js <database_file_path>");
   logger.error("Usage for SQL Server: node index.js --sqlserver --server <server> --database <database> [--user <user> --password <password>]");
   logger.error("Usage for PostgreSQL: node index.js --postgresql --host <host> --database <database> [--user <user> --password <password> --port <port>]");
+  logger.error("Usage for MySQL: node index.js --mysql --host <host> --database <database> [--user <user> --password <password> --port <port>]");
   process.exit(1);
 }
 
@@ -120,6 +121,45 @@ else if (args.includes('--postgresql') || args.includes('--postgres')) {
     logger.error("Error: PostgreSQL requires --host and --database parameters");
     process.exit(1);
   }
+}
+// Check if using MySQL
+else if (args.includes('--mysql')) {
+  dbType = 'mysql';
+  connectionInfo = {
+    host: '',
+    database: '',
+    user: undefined,
+    password: undefined,
+    port: undefined,
+    ssl: undefined,
+    connectionTimeout: undefined
+  };
+  // Parse MySQL connection parameters
+  for (let i = 0; i < args.length; i++) {
+    if (args[i] === '--host' && i + 1 < args.length) {
+      connectionInfo.host = args[i + 1];
+    } else if (args[i] === '--database' && i + 1 < args.length) {
+      connectionInfo.database = args[i + 1];
+    } else if (args[i] === '--user' && i + 1 < args.length) {
+      connectionInfo.user = args[i + 1];
+    } else if (args[i] === '--password' && i + 1 < args.length) {
+      connectionInfo.password = args[i + 1];
+    } else if (args[i] === '--port' && i + 1 < args.length) {
+      connectionInfo.port = parseInt(args[i + 1], 10);
+    } else if (args[i] === '--ssl' && i + 1 < args.length) {
+      const sslVal = args[i + 1];
+      if (sslVal === 'true') connectionInfo.ssl = true;
+      else if (sslVal === 'false') connectionInfo.ssl = false;
+      else connectionInfo.ssl = sslVal;
+    } else if (args[i] === '--connection-timeout' && i + 1 < args.length) {
+      connectionInfo.connectionTimeout = parseInt(args[i + 1], 10);
+    }
+  }
+  // Validate MySQL connection info
+  if (!connectionInfo.host || !connectionInfo.database) {
+    logger.error("Error: MySQL requires --host and --database parameters");
+    process.exit(1);
+  }
 } else {
   // SQLite mode (default)
   dbType = 'sqlite';
@@ -178,6 +218,8 @@ async function runServer() {
       logger.info(`Server: ${connectionInfo.server}, Database: ${connectionInfo.database}`);
     } else if (dbType === 'postgresql') {
       logger.info(`Host: ${connectionInfo.host}, Database: ${connectionInfo.database}`);
+    } else if (dbType === 'mysql') {
+      logger.info(`Host: ${connectionInfo.host}, Database: ${connectionInfo.database}`);
     }
     
     // Initialize the database