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Add support context propagation

enhancementNew feature or requestNew feature or request

Status: Closed (completed).

Enhancement

#225 In modelcontextprotocol/java-sdk;

· by He-Pin was closed on Feb 17, 2026

Add OutputSchema to Tool and CallToolResult.structuredContent

enhancementNew feature or requestNew feature or request

P1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested feature

Status: Closed (completed).

Enhancement

#285 In modelcontextprotocol/java-sdk;

· by pantanurag555 was closed on Feb 18, 2026

Add support for structured output

duplicateThis issue or pull request already existsThis issue or pull request already exists

enhancementNew feature or requestNew feature or request

P1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested feature

Status: Duplicate of an existing item.

Enhancement

#278 In modelcontextprotocol/java-sdk;

· by He-Pin was closed on Feb 18, 2026

· Duplicate

refactor: deprecate tool spec's arguments-only handler in favor of CallToolRequest

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 375

#375 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 11, 2025

Feature: Add completions context

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 369

#369 In modelcontextprotocol/java-sdk;

· by bzsurbhi was closed on Jul 11, 2025

refactor: extract MCP client initialization logic into LifecycleInitializer

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 370

#370 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 11, 2025

Fix non-OK HTTP POST responses handling

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 374

#374 In modelcontextprotocol/java-sdk;

· by chemicL was closed on Jul 11, 2025

fix: improve error handling in HttpClientSseClientTransport and add test

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 391

#391 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 13, 2025

cleanup: Cleaned up some unused imports.

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 358

#358 In modelcontextprotocol/java-sdk;

· by sunyuhan1998 was closed on Jul 14, 2025

refactor: reformat McpSchema.java and reorganize imports

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 392

#392 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 15, 2025

fix: improve compatibility with non-compliant MCP servers

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 413

#413 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 22, 2025

feat: add ignorable JSON-RPC methods support for both client and server

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 417

#417 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 22, 2025

feat: implement HttpClient Streamable HTTP transport

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 337

#337 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 3, 2025

Streamable HTTP Server abstractions and WebFlux transport provider

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 420

#420 In modelcontextprotocol/java-sdk;

· by chemicL was closed on Jul 30, 2025

feat: refactor the tool specifications

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 351

#351 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 5, 2025

feat: add WebMVC and HttpServlet stateless server transports

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 432

#432 In modelcontextprotocol/java-sdk;

· by tzolov was closed on Jul 30, 2025

fix: support freeform stopReason in sampling

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 327

#327 In modelcontextprotocol/java-sdk;

· by LucaButBoring was closed on Jun 24, 2025

fix: resolve duplicate requests caused by concurrent message sending

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 333

#333 In modelcontextprotocol/java-sdk;

· by JooKS-me was closed on Jun 24, 2025

feat: Add client side handlers to handle pagination + fix: Support pagination in tools change notification handler

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 306

#306 In modelcontextprotocol/java-sdk;

· by pantanurag555 was closed on Jun 24, 2025

feat: resource update server notify and client handler

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 264

#264 In modelcontextprotocol/java-sdk;

· by Zizo-Vi was closed on Jun 24, 2025

HttpServlet Streamable HTTP server implementation

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 290

#290 In modelcontextprotocol/java-sdk;

· by ZachGerman was closed on Jul 30, 2025

Sends a heartbeat (ping) to all connected clients to keep connection…

Status: Closed (abandoned).

modelcontextprotocol/java-sdknumber 353

#353 In modelcontextprotocol/java-sdk;

· by FrolikovEA was closed on Jul 30, 2025

Add option for immediate execution in McpSyncServer

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 371

#371 In modelcontextprotocol/java-sdk;

· by Kehrlann was closed on Jul 8, 2025

HttpRequest.Builder customizer for Client transports

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 388

#388 In modelcontextprotocol/java-sdk;

· by Kehrlann was closed on Jul 30, 2025

Fix stdio tests - proper server-everything argument

Status: Merged (completed).

modelcontextprotocol/java-sdknumber 237

#237 In modelcontextprotocol/java-sdk;

· by chemicL was closed on May 14, 2025