java-sdk
The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI
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Recent PRs & issues
Active · Last activity 1d ago
See all on GitHub →Add explicit UTF-8 charset to InputStreamReader in StdioServerTransportProvider. Resolves #295 Motivation and Context The input stream in StdioServerTransportProvider was missing explicit UTF-8 charset, while the output stream already specifies it. How Has This Been Tested? Added a subprocess-based integration test that spawns a child JVM with and verifies multi-byte UTF-8 characters are preserved through StdioServerTransportProvider. This test fails without the fix and passes with it. Breaking Changes No Types of changes [x] Bug fix (non-breaking change which fixes an issue) [ ] New feature (non-breaking change which adds functionality) [ ] Breaking change (fix or feature that would cause existing functionality to change) [ ] Documentation update Checklist [x] I have read the MCP Documentation [x] My code follows the repository's style guidelines [x] New and existing tests pass locally [x] I have added appropriate error handling [x] I have added or updated documentation as needed Additional context AI tools were used for drafting the PR description.
Recent fixes
https://github.com/modelcontextprotocol/java-sdk/blob/c3a0b1855ab2ac18a2b6120773ac4e5060285d8b/mcp-spring/mcp-spring-webflux/src/main/java/io/modelcontextprotocol/client/transport/WebClientStreamableHttpTransport.java#L204-L207 It currently shows "Session not found" even when the HTTP endpoint doesn't exist, which can be misleading for developers.
Structured data for AI agents
Repository: modelcontextprotocol/java-sdk. Description: The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI Stars: 3205, Forks: 822. Primary language: Java. Languages: Java (100%). License: MIT. Homepage: https://java.sdk.modelcontextprotocol.io/latest/ Latest release: v1.0.0 (5d ago). Open PRs: 100, open issues: 152. Last activity: 1d ago. Community health: 87%. Top contributors: tzolov, chemicL, Kehrlann, markpollack, LucaButBoring, sdelamo, CrazyHZM, jitokim, quaff, codeboyzhou and others.