Issues

Issues

• DefaultJsonSchemaValidator caches schemas by hashCode(), so a tool's input can be validated against another tool's schema

  modelcontextprotocol/java-sdk#1328 · opened on Nov 11, 2026
  1

• Make ToolsFeature building blocks reusable

  Enhancement

  modelcontextprotocol/java-sdk#1320 · opened on Nov 9, 2026 · 2.2.0-M3

• Completions follow-ups

  modelcontextprotocol/java-sdk#1318 · opened on Nov 7, 2026
  1

• Forward Mcp-Name header in the McpTransportContext for extension validation

  Enhancement

  modelcontextprotocol/java-sdk#1317 · opened on Nov 6, 2026 · 2.2.0-M3
  3

• Add authorization examples in documentation

  Enhancement

  modelcontextprotocol/java-sdk#1315 · opened on Nov 5, 2026
  1

• Authorize resourceSubscriptions on subscriptions/listen

  Enhancement

  modelcontextprotocol/java-sdk#1307 · opened on Nov 2, 2026 · 2.2.0-M3
  3

• Docs: document the new io.modelcontextprotocol.modern stateless server package

  Enhancement

  modelcontextprotocol/java-sdk#1273 · opened on Oct 24, 2026 · 2.2.0-M3
  3

• Proposal: expose tool-contract pinning helpers (verify a server's tool surface hasn't drifted between sessions)

  Enhancement

  modelcontextprotocol/java-sdk#1272 · opened on Oct 24, 2026
  6

• HttpClientStreamableHttpTransport: a late 404 for an old session invalidates the current, healthy session and fails its in-flight requests

  Bug

  modelcontextprotocol/java-sdk#1270 · opened on Oct 24, 2026
  3

• Validate x-mcp-header in tool input schema

  Enhancement

  modelcontextprotocol/java-sdk#1269 · opened on Oct 23, 2026 · 2.2.0-M3
  3

• 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-M3
  1

• Simplify registering tools, resources and prompts on the modern server

  Enhancement

  modelcontextprotocol/java-sdk#1200 · opened on Oct 20, 2026 · 2.2.0-M3
  2

• Allow injecting a notifier factory for notification filtering and checks

  Enhancement

  modelcontextprotocol/java-sdk#1197 · opened on Oct 20, 2026 · 2.2.0-M3

• Reject subscriptions/listen without notifications

  Bug

  modelcontextprotocol/java-sdk#1196 · opened on Oct 20, 2026 · 2.2.0-M3
  1

• Name the supported protocol versions when rejecting a legacy initialize

  Enhancement

  modelcontextprotocol/java-sdk#1195 · opened on Oct 20, 2026 · 2.2.0-M3
  1

• Upgrade mvnw to 3.10.x

  modelcontextprotocol/java-sdk#1189 · opened on Oct 15, 2026

• StdioServerTransportProvider stops reading after malformed JSON

  modelcontextprotocol/java-sdk#1172 · opened on Oct 12, 2026
  1

• Stdio client stops processing responses after rejecting a malformed response

  modelcontextprotocol/java-sdk#1157 · opened on Oct 2, 2026
  1

• Java client accepts responses with jsonrpc: "1.0"

  modelcontextprotocol/java-sdk#1156 · opened on Oct 2, 2026

• Allow strict validation of CallToolResult.content during deserialization

  modelcontextprotocol/java-sdk#1148 · opened on Sep 29, 2026

• SEP-2640: Skills Extension

  modelcontextprotocol/java-sdk#1140 · opened on Sep 22, 2026

• McpClientSession/McpServerSession: pending response entries leak when a request times out or is cancelled

  Bug

  modelcontextprotocol/java-sdk#1133 · opened on Sep 13, 2026
  1

• Client request handlers that complete empty send no JSON-RPC response

  Bug

  modelcontextprotocol/java-sdk#1124 · opened on Sep 3, 2026
  5

• ServerCapabilities.logging is added unconditionally, overriding the caller's explicit capabilities

  Bug

  modelcontextprotocol/java-sdk#1086 · opened on Aug 11, 2026
  1

• listTools() and the other no-arg list*() methods follow the cursor chain without any bound

  Bug

  modelcontextprotocol/java-sdk#1084 · opened on Aug 10, 2026
  1