1 Release published by 1 person

• v0.11.0

  published Jul 31, 2025

13 Pull requests merged by 6 people

• fix: add backward compatibility for MCP servers returning older protocol versions

  #444 merged Aug 4, 2025

• Fix typo

  #307 merged Aug 1, 2025

• feat: add WebMVC and HttpServlet stateless server transports

  #432 merged Jul 30, 2025

• feat: implement MCP protocol version header support

  #404 merged Jul 30, 2025

• Expose the client initialization result

  #424 merged Jul 30, 2025

• feat: implement MCP-compliant keep-alive functionality for server transports

  #430 merged Jul 30, 2025

• HttpRequest.Builder customizer for Client transports

  #388 merged Jul 30, 2025

• HttpServlet Streamable HTTP server implementation

  #290 merged Jul 30, 2025

• feat: Add Spring WebMVC streamable server transport provider

  #425 merged Jul 30, 2025

• Streamable HTTP Server abstractions and WebFlux transport provider

  #420 merged Jul 30, 2025

• refactor: Replace Map<String, Object> with CallToolRequest in StructuredOutputCallToolHandler

  #408 merged Jul 18, 2025

• fix: improve error handling in HttpClientSseClientTransport and add test

  #391 merged Jul 13, 2025

• Add option for immediate execution in McpSyncServer

  #371 merged Jul 8, 2025

11 Pull requests opened by 7 people

• feat:HttpClientSseClientTransport sendMessage throw McpError when status is not success

  #383 opened Jul 10, 2025

• java-sdk/issues/399: set goal for spring-javaformat to apply

  #418 opened Jul 20, 2025

• Rework MCP error handling

  #422 opened Jul 24, 2025

• "Client failed to initialize by explicit API call" bugfix

  #438 opened Aug 1, 2025

• Initial proposal to for feature request https://github.com/modelcontextprotocol/java-sdk/issues/415

  #439 opened Aug 1, 2025

• default protocol version for streamable should not be 2024-11-05 use 2025-03-26

  #441 opened Aug 2, 2025

• Polish HttpHeaders.MCP_SESSION_ID

  #446 opened Aug 5, 2025

• Use `MCP_PROTOCOL_VERSION` to align with `MCP_SESSION_ID`

  #447 opened Aug 5, 2025

• Remove duplicate header MCP_PROTOCOL_VERSION

  #448 opened Aug 5, 2025

• Use `Last-Event-ID` instead of `last-event-id`

  #449 opened Aug 5, 2025

• Rename `WebFluxSseClientTransport` to `WebClientSseClientTransport`

  #450 opened Aug 5, 2025

15 Issues closed by 7 people

• Unsupported protocol version from the server: 2024-11-05

  #436 closed Aug 4, 2025

• HttpServletStreamableServerTransportProvider seems not to work on subpath contextPath

  #442 closed Aug 2, 2025

• Add protocol version to the release notes

  #250 closed Jul 30, 2025

• Support "Streamable HTTP" transport

  #72 closed Jul 30, 2025

• SSE Server drops client connection at 5 min.

  #414 closed Jul 30, 2025

• The cost of reading and writing data is a bit high for the ChatMemoryRepository API

  #427 closed Jul 29, 2025

• reactor.core.Exceptions$ErrorCallbackNotImplemented: io.modelcontextprotocol.spec.McpError: Received unrecognized SSE event type: null

  #93 closed Jul 25, 2025

• mcp server: get session from exchange

  #213 closed Jul 22, 2025

• Streamable HTTP transport hangs during initialization

  #406 closed Jul 22, 2025

• Add support for ignorable JSON-RPC methods in MCP clients and servers

  #416 closed Jul 22, 2025

• Support progress flow

  #298 closed Jul 17, 2025

• support tool annotation metadata

  #367 closed Jul 14, 2025

• Any method to match and handle the resource by dynamic uri path?

  #100 closed Jul 10, 2025

• McpSchema.Role need a SYSTEM field

  #380 closed Jul 9, 2025

• The SSE stream subscription was not closed and continues to occupy the port after calling the McpSyncClient.close() method

  #373 closed Jul 7, 2025

29 Issues opened by 29 people

• The value of "additionalProperties" MUST be a valid JSON Schema.

  #445 opened Aug 5, 2025

• Is it possible to support consuming an event stream that includes comments?

  #443 opened Aug 4, 2025

• Adding a prompt with a name that is taken causes a server crash

  #440 opened Aug 2, 2025

• Ability to override RequestHandlers to change Tools definitions

  #437 opened Jul 31, 2025

• Expose request context access in McpServerExchange implementations

  #435 opened Jul 31, 2025

• Looking forward to obtaining the request ID in the McpRequestHandler#handle method

  #434 opened Jul 31, 2025

• Streamablehttp throws exception 'Client failed to initialize by explicit API call'

  #433 opened Jul 31, 2025

• MCP Java SDK with minimal dependencies version

  #429 opened Jul 29, 2025

• Session ID agnostic MCP server example

  #428 opened Jul 28, 2025

• Could we differentiate "Session not found" from a regular HTTP 404 response?

  #426 opened Jul 28, 2025

• In mcp sub-module pom.xml useing deprecated expression ${version}

  #419 opened Jul 20, 2025

• Unix Domain Sockets for MCP transport providers

  #415 opened Jul 19, 2025

• Streamable Http clinet fails for fetching tool list

  #412 opened Jul 17, 2025

• Resolve message endpoint path using request context path

  #400 opened Jul 15, 2025

• Add Checkstyle for Automated Code Style Enforcement

  #399 opened Jul 15, 2025

• When will 2025-03-26 and 2025-06-18 or higher be supported ?

  #398 opened Jul 15, 2025

• In Streamable HTTP transport, the sendNotification calls are getting timed out.

  #396 opened Jul 14, 2025

• Expose Nullable / Nonnull on public properties / methods

  #395 opened Jul 14, 2025

• MCP Prompt Role kust have USER and ASSISTANT two options

  #394 opened Jul 14, 2025

• Initialization errors in McpAsyncClient not emitted immediately

  #393 opened Jul 13, 2025

• Expand InitializeRequestHandler

  #390 opened Jul 12, 2025

• Regarding the client receiving N log messages, there is an issue with the interruption of log message listening.

  #387 opened Jul 11, 2025

• Release 0.11.0

  #386 opened Jul 11, 2025

• Ability to send notification from handler

  #385 opened Jul 11, 2025

• WebMvcMcpSessionTransport multi-threaded safe issues

  #382 opened Jul 10, 2025

• A few minutes after the mcp client connects, the server will be disconnected

  #379 opened Jul 8, 2025

• TCP connections remain in CLOSE_WAIT state after client disconnection in SSE mode

  #378 opened Jul 7, 2025

• Error : No handler registered for notification method: notifications/stderr

  #377 opened Jul 6, 2025

• Proposal: Add client state persistence API to allow MCP clients to survive restarts

  #376 opened Jul 6, 2025

22 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• feat: Add client validation for structuredContent

  #302 commented on Jul 29, 2025 • 2 new comments

• fix(client): sendMessage() should fail immediately when connect() fails

  #323 commented on Aug 1, 2025 • 0 new comments

• Feature: Authorization support

  #297 commented on Jul 23, 2025 • 0 new comments

• Add support for DNS rebinding protections

  #284 commented on Jul 25, 2025 • 0 new comments

• fix: Resolve URIs

  #262 commented on Jul 15, 2025 • 0 new comments

• feat: Add request with context support.

  #226 commented on Jul 10, 2025 • 0 new comments

• Fix transport session id mismatch with sessionId

  #176 commented on Jul 30, 2025 • 0 new comments

• More efficient http #156

  #157 commented on Jul 16, 2025 • 0 new comments

• feat: Add Pagination for server requests

  #140 commented on Jul 29, 2025 • 0 new comments

• Major issue -dependency on reactor, slf4j and netty

  #38 commented on Aug 2, 2025 • 0 new comments

• How can I handle headers?

  #59 commented on Jul 31, 2025 • 0 new comments

• standardize tool metadata by adding annotation classes to sdk

  #224 commented on Jul 29, 2025 • 0 new comments

• Add support context propagation

  #225 commented on Jul 29, 2025 • 0 new comments

• Bug: `resources/list` endpoint incorrectly exposes resource templates

  #319 commented on Jul 23, 2025 • 0 new comments

• Server-side Stateful Sessions

  #129 commented on Jul 22, 2025 • 0 new comments

• ERROR McpServerSession - - No handler registered for notification method: notifications/cancelled

  #130 commented on Jul 18, 2025 • 0 new comments

• HttpClientSseClientTransport Connection Timeout

  #360 commented on Jul 17, 2025 • 0 new comments

• Hope to support java8

  #121 commented on Jul 16, 2025 • 0 new comments

• Bug: McpClientSession - Unexpected response for unknown id [an_id]

  #248 commented on Jul 13, 2025 • 0 new comments

• Add support filter tool/resources

  #301 commented on Jul 9, 2025 • 0 new comments

• Cannot define/invoke a completion

  #322 commented on Jul 9, 2025 • 0 new comments

• Why establish SSE link on the first streamable request

  #362 commented on Jul 9, 2025 • 0 new comments