Mirror of https://github.com/modelcontextprotocol/java-sdk — The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI
- Java 100%
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629464b1d6* McpSyncClient: introduce McpTransportContext - McpSyncClient should be considered thread-agnostic, and therefore consumers cannot rely on thread locals to propagate "context", e.g. pass down the Servlet request reference in a server context. - This PR introduces a mechanism for populating an McpTransportContext before executing client operations, and reworks the HTTP request customizers to leverage that McpTransportContext. - Move McpTransportContext from server to common package for shared client/server usage - Make McpTransportContext immutable by removing put() and copy() methods - Add static create() factory method for creating contexts with predefined data - Update McpTransportContextExtractor to return context instead of modifying one - Replace DefaultMcpTransportContext mutable implementation with immutable version - Update all transport implementations to use McpTransportContext.EMPTY as default - Rename *HttpRequestCustomizer -> *HttpClientRequestCustomizer - Add end-to-end McpTransportContextIntegrationTests - This PR introduces a breaking change to the Sync/Async request customizers. Signed-off-by: Daniel Garnier-Moiroux <git@garnier.wf> |
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MCP Java SDK
A set of projects that provide Java SDK integration for the Model Context Protocol. This SDK enables Java applications to interact with AI models and tools through a standardized interface, supporting both synchronous and asynchronous communication patterns.
📚 Reference Documentation
MCP Java SDK documentation
For comprehensive guides and SDK API documentation
- Features - Overview the features provided by the Java MCP SDK
- Architecture - Java MCP SDK architecture overview.
- Java Dependencies / BOM - Java dependencies and BOM.
- Java MCP Client - Learn how to use the MCP client to interact with MCP servers.
- Java MCP Server - Learn how to implement and configure a MCP servers.
Spring AI MCP documentation
Spring AI MCP extends the MCP Java SDK with Spring Boot integration, providing both client and server starters. Bootstrap your AI applications with MCP support using Spring Initializer.
Development
Building from Source
./mvnw clean install -DskipTests
Running Tests
To run the tests you have to pre-install Docker and npx.
./mvnw test
Contributing
Contributions are welcome! Please follow the Contributing Guidelines.
Team
- Christian Tzolov
- Dariusz Jędrzejczyk
Links
License
This project is licensed under the MIT License.