For comprehensive guides and API documentation, visit the [MCP Java SDK Reference Documentation](docs/docs/overview.mdx).

<img src="docs/images/java-mcp-client-architecture.jpg" width="600">

<img src="docs/images/java-mcp-server-architecture.jpg" width="600">

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

- Synchronous and asynchronous [MCP Client](docs/docs/mcp-client.mdx) and [MCP Server](docs/docs/mcp-server.mdx) implementations

- Standard MCP operations support (tool discovery, resource management, prompt handling, structured logging). Support for request and notification handling.

- [Stdio](https://spec.modelcontextprotocol.io/specification/2024-11-05/basic/transports/#stdio) and [SSE](https://spec.modelcontextprotocol.io/specification/2024-11-05/basic/transports/#http-with-sse) transport implementations:

- 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 implementations usin gthe Spring Webflux or WebMvc libraries.

- [WebFlux SSE Transport](https://github.com/modelcontextprotocol/java-sdk/tree/main/mcp-spring/mcp-spring-webflux) - Reactive HTTP streaming with Spring WebFlux (Client & Server)

- [WebMvc SSE Transport](https://github.com/modelcontextprotocol/java-sdk/tree/main/mcp-spring/mcp-spring-webmvc) - Spring MVC based HTTP SSE transport (Server only).

You can use the core `HttpClientSseClientTransport` transport as a SSE client.

Add the following dependencies to your Maven project:

<dependency>

<groupId>io.modelcontextprotocol.sdk</groupId>

<artifactId>mcp</artifactId>

</dependency>

<dependency>

<groupId>io.modelcontextprotocol.sdk</groupId>

<artifactId>mcp-spring-webflux</artifactId>

</dependency>

<dependency>

<groupId>io.modelcontextprotocol.sdk</groupId>

<artifactId>mcp-spring-webmvc</artifactId>

</dependency>

Explore these MCP examples in the [spring-ai-examples/model-context-protocol](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol) repository:

- [SQLite Simple](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/sqlite/simple) - Demonstrates LLM integration with a database

- [SQLite Chatbot](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/sqlite/chatbot) - Interactive chatbot with SQLite database interaction

- [Filesystem](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/filesystem) - Enables LLM interaction with local filesystem folders and files

- [Brave](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/brave) - Enables natural language interactions with Brave Search, allowing you to perform internet searches.

- [Theme Park API Example](https://github.com/habuma/spring-ai-examples/tree/main/spring-ai-mcp) - Shows how to create an MCP server and client with Spring AI, exposing Theme Park API tools

- [Http SSE Client + WebMvc SSE Server](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/mcp-webmvc-server) - Showcases how to create and use MCP WebMvc servers and HttpClient clients with different capabilities.

- [WebFlux SSE Client + WebFlux SSE Server](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/mcp-webflux-server) - Showcases how to create and use MCP WebFlux servers and clients with different capabilities

- [HttpClient SSE Client + Servlet SSE Server](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/mcp-servlet-server) - Showcases how to create and use MCP Servlet SSE Server and HttpClient SSE Client with different capabilities