MCP Java SDK

Set of projects that provide Java SDK integration for the Model Context Protocol. It enables Java applications to interact with AI models and tools through a standardized interface, supporting both synchronous and asynchronous communication patterns.

📚 Reference Documentation

For comprehensive guides and API documentation, visit the MCP Java SDK Reference Documentation.

Projects

MCP

Java implementation of the Model Context Protocol specification. It includes:

• Synchronous and asynchronous MCP Client and MCP Server implementations
• Standard MCP operations support (tool discovery, resource management, prompt handling, structured logging). Support for request and notification handling.
• Stdio and SSE transport implementations.

MCP Spring

Core Transports

• Stdio-based (StdioClientTransport, StdioServerTransport) for process-based communication
• Java HttpClient-based SSE client (HttpClientSseClientTransport) for HTTP streaming
• Servlet-based SSE server (HttpServletSseServerTransport) for HTTP SSE Server streaming using traditional Servlet API

Optional SSE Transports

• WebFlux SSE Transport - Reactive HTTP streaming with Spring WebFlux (Client & Server)
• WebMvc SSE Transport - Spring MVC based HTTP SSE transport (Server only). You can use the core HttpClientSseClientTransport transport as a SSE client.

Installation

Add the following dependencies to your Maven project:

<!-- Core MCP -->
<dependency>
    <groupId>io.modelcontextprotocol.sdk</groupId>
    <artifactId>mcp</artifactId>
</dependency>

<!-- Optional: WebFlux SSE transport -->
<dependency>
    <groupId>io.modelcontextprotocol.sdk</groupId>
    <artifactId>mcp-spring-webflux</artifactId>
</dependency>

<!-- Optional: WebMVC SSE transport -->
<dependency>
    <groupId>io.modelcontextprotocol.sdk</groupId>
    <artifactId>mcp-spring-webmvc</artifactId>
</dependency>

Example Demos

Explore these MCP examples in the spring-ai-examples/model-context-protocol repository:

• SQLite Simple - Demonstrates LLM integration with a database
• SQLite Chatbot - Interactive chatbot with SQLite database interaction
• Filesystem - Enables LLM interaction with local filesystem folders and files
• Brave - Enables natural language interactions with Brave Search, allowing you to perform internet searches.
• Theme Park API Example - Shows how to create an MCP server and client with Spring AI, exposing Theme Park API tools
• Http SSE Client + WebMvc SSE Server - Showcases how to create and use MCP WebMvc servers and HttpClient clients with different capabilities.
• WebFlux SSE Client + WebFlux SSE Server - Showcases how to create and use MCP WebFlux servers and clients with different capabilities
• HttpClient SSE Client + Servlet SSE Server - Showcases how to create and use MCP Servlet SSE Server and HttpClient SSE Client with different capabilities

Documentation

• Java MCP SDK documentation
  • Reference documentation

Development

• Building from Source

mvn clean install

• Running Tests

mvn test

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Submit a Pull Request

Team

• Christian Tzolov
• Dariusz Jędrzejczyk

Links

• GitHub Repository
• Issue Tracker
• CI/CD

License

This project is licensed under the MIT.