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McpTransportContext.create documents an unmodifiable context but stores the caller's map by reference

Status: Open.

#1077In modelcontextprotocol/java-sdk;

· iuliiasobolevska opened on Aug 1, 2026

Add transportContextProvider to McpClient.AsyncSpec

Status: Open.

#1075In modelcontextprotocol/java-sdk;

· iuliiasobolevska opened on Aug 1, 2026

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

Status: Open.

#1074In modelcontextprotocol/java-sdk;

· iuliiasobolevska opened on Aug 1, 2026

Allow composing request customizers on the HTTP client transport builders

Status: Open.

#1073In modelcontextprotocol/java-sdk;

· iuliiasobolevska opened on Aug 1, 2026

[2026-07-28] Java SDK 2.0.0 returns HTTP 500 for OpenAI server/discover requests

Status: Open.

#1072In modelcontextprotocol/java-sdk;

· morad3741 opened on Jul 30, 2026

Disable standalone GET SSE Stream option for Streamable HTTP client transport

Status: Open.

#1068In modelcontextprotocol/java-sdk;

· leo237 opened on Jul 21, 2026

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

Status: Open.

#1067In modelcontextprotocol/java-sdk;

· michaelboyles opened on Jul 19, 2026

Migrate null annotations to jspecify

Status: Open.

#1066In modelcontextprotocol/java-sdk;

· michaelboyles opened on Jul 18, 2026

Un-deprecate/add no-arg builders

Status: Open.

#1065In modelcontextprotocol/java-sdk;

· michaelboyles opened on Jul 18, 2026

Expose API to inspect and remove inactive server sessions

Status: Open.

#1063In modelcontextprotocol/java-sdk;

· ArchForge286 opened on Jul 17, 2026

Stateful streamable server calls listRoots() unconditionally on roots/list_changed, blocking a servlet thread until requestTimeout when no roots consumer is registered

Status: Open.

#1061In modelcontextprotocol/java-sdk;

· mayur9991 opened on Jul 16, 2026

SSE client rejects valid retry: field and ignores reconnection timing (Streamable HTTP)

area/client

area/transport

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

waiting for userWaiting for user feedback or more detailsWaiting for user feedback or more details

Status: Open.

#1047In modelcontextprotocol/java-sdk;

· imankhadiv opened on Jun 30, 2026