Issues

• Java client accepts responses with jsonrpc: "1.0"

  area/clientP3
  modelcontextprotocol/java-sdk#1156 · Filter by author anilloutombam opened on Oct 2, 2026

• HttpServletStreamableServerTransportProvider: GET stream sends no status or headers until the first event

  area/serverarea/transportP3
  modelcontextprotocol/java-sdk#1155 · Filter by author remi-sf opened on Oct 1, 2026

• Allow strict validation of CallToolResult.content during deserialization

  area/clientP3
  modelcontextprotocol/java-sdk#1148 · Filter by author kele5555 opened on Sep 29, 2026

• SEP-2640: Skills Extension

  extensionsP3
  modelcontextprotocol/java-sdk#1140 · Filter by author uc4w6c opened on Sep 22, 2026

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

  bugP3
  Bug

  modelcontextprotocol/java-sdk#1084 · Filter by author harikrishna8121999 opened on Aug 10, 2026
  1

• Request customizers can't tell which connection a request belongs to

  area/clientarea/transportP3waiting for user
  Enhancement

  modelcontextprotocol/java-sdk#1074 · Filter by author iuliiasobolevska opened on Aug 1, 2026
  3

  

• Disable standalone GET SSE Stream option for Streamable HTTP client transport

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#1068 · Filter by author leo237 opened on Jul 21, 2026

• Reject listRoots if not supported by client, without sending any request

  enhancementgood first issueP3
  Enhancement

  modelcontextprotocol/java-sdk#1067 · Filter by author michaelboyles opened on Jul 19, 2026
  1

• Un-deprecate/add no-arg builders

  enhancementneeds confirmationP3
  Enhancement

  modelcontextprotocol/java-sdk#1065 · Filter by author michaelboyles opened on Jul 18, 2026

• Server should handle paginated requests

  area/serverenhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#967 · Filter by author denniskawurek opened on May 17, 2026 · 2.1
  3

• Streamable HTTP server accepts POST requests with non-JSON request Content-Type

  enhancementneeds confirmationP3
  Enhancement

  modelcontextprotocol/java-sdk#961 · Filter by author cclabadmin opened on May 15, 2026

• Add Bulk Operations for tools

  enhancementP3ready for work
  Enhancement

  modelcontextprotocol/java-sdk#941 · Filter by author amaan75 opened on Apr 29, 2026
  1

• Stabilize flaky test: McpCompletionTests.testCompletionErrorOnMissingContext

  needs reproP3tests
  modelcontextprotocol/java-sdk#902 · Filter by author ashakirin opened on Apr 4, 2026
  14

• MCP server in WAR on application server

  enhancementP3waiting for user
  Enhancement

  modelcontextprotocol/java-sdk#763 · Filter by author uhrm opened on Jan 29, 2026
  5

• Add ability to intercept tool call executions.

  enhancementfeature/repositoriesP3
  Enhancement

  modelcontextprotocol/java-sdk#720 · Filter by author 24kpure opened on Dec 12, 2025
  8

• Allow custom or numeric request ID generation (Snowflake MCP server rejects string IDs)

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#703 · Filter by author manasnilorout opened on Nov 27, 2025
  1

• Java MCP Server examples are incomplete and non-runnable

  documentationP3
  Enhancement

  modelcontextprotocol/java-sdk#687 · Filter by author GVLLIFESTYLE opened on Nov 25, 2025
  3

• There are two JsonSchemaValidator

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#666 · Filter by author He-Pin opened on Nov 15, 2025
  2

• Null fields in JsonSchema without @Nullable annotation break serialization with Jackson

  bugP3
  Bug

  modelcontextprotocol/java-sdk#664 · Filter by author stephanlensky opened on Nov 12, 2025

• Support running test cases in offline environments

  enhancementP3tests
  Enhancement

  modelcontextprotocol/java-sdk#636 · Filter by author D-0771 opened on Oct 27, 2025

• Add null-safety validation and safe fallbacks for features / clientCapabilities in McpAsyncClient constructor and feature branches

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#634 · Filter by author King-sNimple opened on Oct 27, 2025

• Refactor McpTransport Abs ,Reduce duplicate code and improve readability

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#581 · Filter by author JunJieLiu51520 opened on Sep 28, 2025
  1

• Add Primitive repository APIs (ResourceRepository, ToolsRepository, ... )

  enhancementfeature/repositoriesP3
  Enhancement

  modelcontextprotocol/java-sdk#578 · Filter by author sdelamo opened on Sep 26, 2025 · 2.2
  20

• Add an ability to trace requests

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#561 · Filter by author tgodzik opened on Sep 19, 2025
  6

• add a configuration option that can ignore illegal format jsonrpc

  enhancementP3
  Enhancement

  modelcontextprotocol/java-sdk#544 · Filter by author colommar opened on Sep 10, 2025
  1