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2.2.0-M2

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•Last updated Oct 31, 2026

25% complete

Add Primitive repository APIs (ResourceRepository, ToolsRepository, ... )
Enhancement
modelcontextprotocol/java-sdk#578 · opened on Sep 26, 2025 · 2.2.0-M2
20
SEP-2243: HTTP Header Standardization for Streamable HTTP Transport
Enhancement
modelcontextprotocol/java-sdk#990 · opened on May 29, 2026 · 2.2.0-M2
3
SEP-1865: MCP Apps - Interactive User Interfaces for MCP
modelcontextprotocol/java-sdk#999 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2106: Tools inputSchema & outputSchema Conform to JSON Schema 2020-12
modelcontextprotocol/java-sdk#1000 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2164: Standardize resource not found error code (-32602)
Enhancement
modelcontextprotocol/java-sdk#1001 · opened on Jun 6, 2026 · 2.2.0-M2
SEP-2260: Require Server requests to be associated with a Client request
Enhancement
modelcontextprotocol/java-sdk#1003 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2322: Multi Round-Trip Requests
Enhancement
modelcontextprotocol/java-sdk#1004 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2352: Clarify authorization server binding and migration
Enhancement
modelcontextprotocol/java-sdk#1007 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2468: Recommend Issuer (iss) Parameter in MCP Auth Responses
Enhancement
modelcontextprotocol/java-sdk#1008 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2549: TTL for List Results
Enhancement
modelcontextprotocol/java-sdk#1009 · opened on Jun 6, 2026 · 2.2.0-M2
1
SEP-2567: Sessionless MCP via Explicit State Handles
Enhancement
modelcontextprotocol/java-sdk#1010 · opened on Jun 6, 2026 · 2.2.0-M2
SEP-2575: Make MCP Stateless
Enhancement
modelcontextprotocol/java-sdk#1011 · opened on Jun 6, 2026 · 2.2.0-M2
11
SEP-2577: Deprecate Roots, Sampling, and Logging
Enhancement
modelcontextprotocol/java-sdk#1012 · opened on Jun 6, 2026 · 2.2.0-M2
SEP-2663: Tasks Extension
Enhancement
modelcontextprotocol/java-sdk#1013 · opened on Jun 6, 2026 · 2.2.0-M2
5
feat(mcp-core): support Mcp-Name header for Streamable HTTP (SEP-2243)
Unread
#994 opened Jun 3, 2026 · Updated Oct 16, 2026
3
fix: standardize resource not found error code
Unread
#1037 opened Jun 24, 2026 · Updated Oct 16, 2026
3
Name the supported protocol versions when rejecting a legacy initialize
Enhancement
modelcontextprotocol/java-sdk#1195 · opened on Oct 20, 2026 · 2.2.0-M2
1
Reject subscriptions/listen without notifications
Bug
modelcontextprotocol/java-sdk#1196 · opened on Oct 20, 2026 · 2.2.0-M2
1
Allow injecting a notifier factory for notification filtering and checks
Enhancement
modelcontextprotocol/java-sdk#1197 · opened on Oct 20, 2026 · 2.2.0-M2
Validate SEP-2243 Mcp-Param-{Name} headers in the modern server
Enhancement
modelcontextprotocol/java-sdk#1199 · opened on Oct 20, 2026 · 2.2.0-M2
1
Simplify registering tools, resources and prompts on the modern server
Enhancement
modelcontextprotocol/java-sdk#1200 · opened on Oct 20, 2026 · 2.2.0-M2
1
Support dual-era servers (legacy + 2026-07-28 on the same endpoint)
Enhancement
modelcontextprotocol/java-sdk#1203 · opened on Oct 20, 2026 · 2.2.0-M2
1
Validate x-mcp-header in tool input schema
Enhancement
modelcontextprotocol/java-sdk#1269 · opened on Oct 23, 2026 · 2.2.0-M2
2
Docs: document the new io.modelcontextprotocol.modern stateless server package
Enhancement
modelcontextprotocol/java-sdk#1273 · opened on Oct 24, 2026 · 2.2.0-M2
1