modelcontextprotocol

modelcontextprotocol/java-sdk

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

8 good first / help-wanted issues · Java · last activity Jul 2, 2026

3.5K stars 913 forks 3.5K watchers Java MIT License
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8 Open Issues Need Help Last updated: Jul 2, 2026

Open Issues Need Help

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Reject listRoots if not supported by client, without sending any request 18 days ago
enhancement good first issue P3
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
Support cancellation about 2 months ago
enhancement help wanted P1
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
StdioServerTransportProvider uses incorrect Mono.zip operator 3 months ago
bug good first issue ready for work P3
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
Streamable session clean up 3 months ago
bug help wanted area/server feature/session-storage P1
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
Does StdioServerTransportProvider support protocol version 2025-06-18 ? 3 months ago
bug good first issue P1
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
Non initialized McpServerSession hangs and timesout instead of providing helpful error message 4 months ago
enhancement help wanted area/server feature/session-storage
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
io.modelcontextprotocol.util.Utils#resolveUri incorrectly handles nested paths 5 months ago
enhancement help wanted area/client P2
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java
HttpServletStreamableServerTransportProvider does not implement protocol version 2024-11-05 8 months ago
bug good first issue ready for work P3
modelcontextprotocol/java-sdk
3.5K

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

Java