Oracle MCP Server

A Model Context Protocol (MCP) server implementation for Oracle database operations, built on top of spring-ai-mcp-server-webmvc-spring-boot-starter. This service provides a set of tools for interacting with Oracle databases through MCP, utilizing Server-Sent Events (SSE) for real-time communication.

Features

• List all tables in the Oracle database
• Describe table structure (columns, data types, constraints)
• Execute SQL statements (SELECT, INSERT, UPDATE, DELETE)
• Secure database connection management
• Real-time communication via SSE
• Built on spring-ai-mcp-server-webmvc-spring-boot-starter

Technology Stack

Core Dependencies

• Spring Boot 3.2.0
• spring-ai-mcp-server-webmvc-spring-boot-starter
• Oracle JDBC Driver
• Model Context Protocol (MCP) Framework
• Lombok

Development Tools

• Java 17
• Maven 3.6+
• Spring Boot Test Framework
• JUnit 5

Getting Started

Prerequisites

• JDK 17
• Maven 3.6+
• Oracle Database instance
• MCP Server environment
• Cursor IDE

Configuration

1. Database Configuration

Create or modify application.properties or application.yml with the following settings:

oracle:
  connectionString: jdbc:oracle:thin:@//your-oracle-host:1521/your-service-name
  username: your-username
  password: your-password

2. Cursor MCP Configuration

In your Cursor IDE, configure the MCP server in the settings:

{
  "mcpServers": {
    "oracle-mcp-server": {
      "url": "http://{server-ip}:{server-port}/sse",
      "enabled": true
    }
  }
}

This configuration:

• Sets the MCP server name as "oracle-mcp-server"
• Configures the server URL to "http://{server-ip}:{server-port}/sse"
  • Replace {server-ip} with your server's IP address
  • Replace {server-port} with your server's port number
• Enables the MCP server for use in Cursor

Building the Project

mvn clean install

Running the Application

mvn spring-boot:run

API Tools

1. List Tables Tool

• Name: list_tables
• Description: Get a list of all tables in Oracle database
• Usage: No parameters required
• Returns: Newline-separated list of table names

2. Describe Table Tool

• Name: describe_table
• Description: Get structure information of specified table
• Parameter: tableName - Name of the table to describe
• Returns: CSV format of table structure including:
  • Column names
  • Data types
  • Nullable status
  • Data length
  • Primary key information

3. Execute SQL Tool

• Name: execute_sql
• Description: Execute Oracle SQL statement
• Parameter: sql - SQL statement to execute
• Returns:
  • For SELECT: CSV format of query results
  • For INSERT/UPDATE/DELETE: Number of affected rows

Implementation Details

Architecture

com.mcp.oracle/
├── config/
│   └── OracleConfig.java         # Database configuration
├── service/
│   └── OracleService.java        # Core service implementation
└── OracleApplication.java        # Application entry point

Key Components

1. OracleConfig

   • Handles database connection configuration
   • Uses Spring's @ConfigurationProperties
   • Secure password management

2. OracleService

   • Implements MCP tools for database operations
   • Manages database connections
   • Handles SQL execution and result formatting
   • Implements error handling and logging

3. Connection Management

   • Uses Oracle's connection pooling
   • Implements auto-closing of resources
   • Handles connection errors gracefully

Security Considerations

• Password encryption in configuration
• Connection pool management
• SQL injection prevention
• Error message sanitization

Testing

The project includes comprehensive unit tests:

mvn test

Test coverage includes:

• Database connection
• Table listing
• Table structure description
• SQL execution
• Error handling

Error Handling

The service implements robust error handling:

• Connection failures
• Invalid SQL statements
• Missing tables/columns
• Permission issues

Contributing

1. Fork the repository
2. Create your feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Support

For support and questions, please create an issue in the repository.