Release version 1.1.2

Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>

ROADMAP.md

@@ -27,7 +27,7 @@ Once we catch up on the most recent MCP specification revision we aim to fully s
 
 ### v1.x Development
 
-The Java SDK is currently in active development as v1.x, following a recent stable 1.0.0 release. The SDK provides:
+The Java SDK is currently in active development as v1.x, following a recent stable 1.1.0 release. The SDK provides:
 
 - MCP protocol implementation
 - Synchronous and asynchronous programming models

conformance-tests/VALIDATION_RESULTS.md

@@ -87,7 +87,7 @@ cd conformance-tests/client-jdk-http-client
 # Run all scenarios
 for scenario in initialize tools_call elicitation-sep1034-client-defaults sse-retry; do
   npx @modelcontextprotocol/conformance client \
-    --command "java -jar target/client-jdk-http-client-1.1.0-SNAPSHOT.jar" \
+    --command "java -jar target/client-jdk-http-client-1.1.1-SNAPSHOT.jar" \
     --scenario $scenario
 done
 ```
@@ -104,7 +104,7 @@ cd conformance-tests/client-spring-http-client
 # Run auth suite
 npx @modelcontextprotocol/conformance@0.1.15 client \
   --spec-version 2025-11-25 \
-  --command "java -jar target/client-spring-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar target/client-spring-http-client-1.1.1-SNAPSHOT.jar" \
   --suite auth
 ```
 

conformance-tests/client-jdk-http-client/README.md

@@ -54,7 +54,7 @@ cd conformance-tests/client-jdk-http-client
 
 This creates an executable JAR at:
 ```
-target/client-jdk-http-client-1.1.0-SNAPSHOT.jar
+target/client-jdk-http-client-1.1.1-SNAPSHOT.jar
 ```
 
 ## Running Tests
@@ -65,19 +65,19 @@ Run a single scenario:
 
 ```bash
 npx @modelcontextprotocol/conformance client \
-  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario initialize
 
 npx @modelcontextprotocol/conformance client \
-  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario tools_call
 
 npx @modelcontextprotocol/conformance client \
-  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario elicitation-sep1034-client-defaults
 
 npx @modelcontextprotocol/conformance client \
-  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario sse-retry
 ```
 
@@ -85,7 +85,7 @@ Run with verbose output:
 
 ```bash
 npx @modelcontextprotocol/conformance client \
-  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario initialize \
   --verbose
 ```
@@ -96,7 +96,7 @@ You can also run the client manually if you have a test server:
 
 ```bash
 export MCP_CONFORMANCE_SCENARIO=initialize
-java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.0-SNAPSHOT.jar http://localhost:3000/mcp
+java -jar conformance-tests/client-jdk-http-client/target/client-jdk-http-client-1.1.1-SNAPSHOT.jar http://localhost:3000/mcp
 ```
 
 ## Test Results

conformance-tests/client-jdk-http-client/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>conformance-tests</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>client-jdk-http-client</artifactId>
 	<packaging>jar</packaging>
@@ -28,7 +28,7 @@
 		<dependency>
 			<groupId>io.modelcontextprotocol.sdk</groupId>
 			<artifactId>mcp</artifactId>
-			<version>1.1.0-SNAPSHOT</version>
+			<version>1.1.2</version>
 		</dependency>
 
 		<!-- Logging -->

conformance-tests/client-spring-http-client/README.md

@@ -67,7 +67,7 @@ cd conformance-tests/client-spring-http-client
 
 This creates an executable JAR at:
 ```
-target/client-spring-http-client-1.1.0-SNAPSHOT.jar
+target/client-spring-http-client-1.1.1-SNAPSHOT.jar
 ```
 
 ## Running Tests
@@ -79,7 +79,7 @@ Run the full auth suite:
 ```bash
 npx @modelcontextprotocol/conformance@0.1.15 client \
   --spec-version 2025-11-25 \
-  --command "java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.1-SNAPSHOT.jar" \
   --suite auth
 ```
 
@@ -88,7 +88,7 @@ Run a single scenario:
 ```bash
 npx @modelcontextprotocol/conformance@0.1.15 client \
   --spec-version 2025-11-25 \
-  --command "java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario auth/metadata-default
 ```
 
@@ -97,7 +97,7 @@ Run with verbose output:
 ```bash
 npx @modelcontextprotocol/conformance@0.1.15 client \
   --spec-version 2025-11-25 \
-  --command "java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.0-SNAPSHOT.jar" \
+  --command "java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.1-SNAPSHOT.jar" \
   --scenario auth/metadata-default \
   --verbose
 ```
@@ -108,7 +108,7 @@ You can also run the client manually if you have a test server:
 
 ```bash
 export MCP_CONFORMANCE_SCENARIO=auth/metadata-default
-java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.0-SNAPSHOT.jar http://localhost:3000/mcp
+java -jar conformance-tests/client-spring-http-client/target/client-spring-http-client-1.1.1-SNAPSHOT.jar http://localhost:3000/mcp
 ```
 
 ## Known Issues

conformance-tests/client-spring-http-client/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>conformance-tests</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>client-spring-http-client</artifactId>
 	<packaging>jar</packaging>

conformance-tests/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>conformance-tests</artifactId>
 	<packaging>pom</packaging>

conformance-tests/server-servlet/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>conformance-tests</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>server-servlet</artifactId>
 	<packaging>jar</packaging>
@@ -28,7 +28,7 @@
 		<dependency>
 			<groupId>io.modelcontextprotocol.sdk</groupId>
 			<artifactId>mcp</artifactId>
-			<version>1.1.0-SNAPSHOT</version>
+			<version>1.1.2</version>
 		</dependency>
 
 		<dependency>

docs/quickstart.md

@@ -123,7 +123,7 @@ Add the BOM to your project:
             <dependency>
                 <groupId>io.modelcontextprotocol.sdk</groupId>
                 <artifactId>mcp-bom</artifactId>
-                <version>1.0.0</version>
+                <version>1.1.0</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -135,7 +135,7 @@ Add the BOM to your project:
 
     ```groovy
     dependencies {
-        implementation platform("io.modelcontextprotocol.sdk:mcp-bom:1.0.0")
+        implementation platform("io.modelcontextprotocol.sdk:mcp-bom:1.1.0")
         //...
     }
     ```

mcp-bom/pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.modelcontextprotocol.sdk</groupId>
         <artifactId>mcp-parent</artifactId>
-        <version>1.1.0-SNAPSHOT</version>
+        <version>1.1.2</version>
     </parent>
 
     <artifactId>mcp-bom</artifactId>

mcp-core/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>mcp-core</artifactId>
 	<packaging>jar</packaging>

mcp-core/src/main/java/io/modelcontextprotocol/client/McpAsyncClient.java

@@ -303,7 +303,7 @@ public class McpAsyncClient {
 				return Mono.empty();
 			}
 
-			return this.listToolsInternal(init, McpSchema.FIRST_PAGE).doOnNext(listToolsResult -> {
+			return this.listToolsInternal(init, McpSchema.FIRST_PAGE, null).doOnNext(listToolsResult -> {
 				listToolsResult.tools()
 					.forEach(tool -> logger.debug("Tool {} schema: {}", tool.name(), tool.outputSchema()));
 				if (enableCallToolSchemaCaching && listToolsResult.tools() != null) {
@@ -645,16 +645,27 @@ public class McpAsyncClient {
 	 * @return A Mono that emits the list of tools result
 	 */
 	public Mono<McpSchema.ListToolsResult> listTools(String cursor) {
-		return this.initializer.withInitialization("listing tools", init -> this.listToolsInternal(init, cursor));
+		return this.initializer.withInitialization("listing tools", init -> this.listToolsInternal(init, cursor, null));
 	}
 
-	private Mono<McpSchema.ListToolsResult> listToolsInternal(Initialization init, String cursor) {
+	/**
+	 * Retrieves a paginated list of tools with optional metadata.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return A Mono that emits the list of tools result
+	 */
+	public Mono<McpSchema.ListToolsResult> listTools(String cursor, Map<String, Object> meta) {
+		return this.initializer.withInitialization("listing tools", init -> this.listToolsInternal(init, cursor, meta));
+	}
+
+	private Mono<McpSchema.ListToolsResult> listToolsInternal(Initialization init, String cursor,
+			Map<String, Object> meta) {
 
 		if (init.initializeResult().capabilities().tools() == null) {
 			return Mono.error(new IllegalStateException("Server does not provide tools capability"));
 		}
 		return init.mcpSession()
-			.sendRequest(McpSchema.METHOD_TOOLS_LIST, new McpSchema.PaginatedRequest(cursor),
+			.sendRequest(McpSchema.METHOD_TOOLS_LIST, new McpSchema.PaginatedRequest(cursor, meta),
 					LIST_TOOLS_RESULT_TYPE_REF)
 			.doOnNext(result -> {
 				// Validate tool names (warn only)
@@ -725,12 +736,30 @@ public class McpAsyncClient {
 	 * @see #readResource(McpSchema.Resource)
 	 */
 	public Mono<McpSchema.ListResourcesResult> listResources(String cursor) {
+		return this.listResourcesInternal(cursor, null);
+	}
+
+	/**
+	 * Retrieves a paginated list of resources provided by the server. Resources represent
+	 * any kind of UTF-8 encoded data that an MCP server makes available to clients, such
+	 * as database records, API responses, log files, and more.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return A Mono that completes with the list of resources result.
+	 * @see McpSchema.ListResourcesResult
+	 * @see #readResource(McpSchema.Resource)
+	 */
+	public Mono<McpSchema.ListResourcesResult> listResources(String cursor, Map<String, Object> meta) {
+		return this.listResourcesInternal(cursor, meta);
+	}
+
+	private Mono<McpSchema.ListResourcesResult> listResourcesInternal(String cursor, Map<String, Object> meta) {
 		return this.initializer.withInitialization("listing resources", init -> {
 			if (init.initializeResult().capabilities().resources() == null) {
 				return Mono.error(new IllegalStateException("Server does not provide the resources capability"));
 			}
 			return init.mcpSession()
-				.sendRequest(McpSchema.METHOD_RESOURCES_LIST, new McpSchema.PaginatedRequest(cursor),
+				.sendRequest(McpSchema.METHOD_RESOURCES_LIST, new McpSchema.PaginatedRequest(cursor, meta),
 						LIST_RESOURCES_RESULT_TYPE_REF);
 		});
 	}
@@ -795,12 +824,30 @@ public class McpAsyncClient {
 	 * @see McpSchema.ListResourceTemplatesResult
 	 */
 	public Mono<McpSchema.ListResourceTemplatesResult> listResourceTemplates(String cursor) {
+		return this.listResourceTemplatesInternal(cursor, null);
+	}
+
+	/**
+	 * Retrieves a paginated list of resource templates provided by the server. Resource
+	 * templates allow servers to expose parameterized resources using URI templates,
+	 * enabling dynamic resource access based on variable parameters.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return A Mono that completes with the list of resource templates result.
+	 * @see McpSchema.ListResourceTemplatesResult
+	 */
+	public Mono<McpSchema.ListResourceTemplatesResult> listResourceTemplates(String cursor, Map<String, Object> meta) {
+		return this.listResourceTemplatesInternal(cursor, meta);
+	}
+
+	private Mono<McpSchema.ListResourceTemplatesResult> listResourceTemplatesInternal(String cursor,
+			Map<String, Object> meta) {
 		return this.initializer.withInitialization("listing resource templates", init -> {
 			if (init.initializeResult().capabilities().resources() == null) {
 				return Mono.error(new IllegalStateException("Server does not provide the resources capability"));
 			}
 			return init.mcpSession()
-				.sendRequest(McpSchema.METHOD_RESOURCES_TEMPLATES_LIST, new McpSchema.PaginatedRequest(cursor),
+				.sendRequest(McpSchema.METHOD_RESOURCES_TEMPLATES_LIST, new McpSchema.PaginatedRequest(cursor, meta),
 						LIST_RESOURCE_TEMPLATES_RESULT_TYPE_REF);
 		});
 	}
@@ -895,8 +942,26 @@ public class McpAsyncClient {
 	 * @see #getPrompt(GetPromptRequest)
 	 */
 	public Mono<ListPromptsResult> listPrompts(String cursor) {
-		return this.initializer.withInitialization("listing prompts", init -> init.mcpSession()
+		return this.listPromptsInternal(cursor, null);
-			.sendRequest(McpSchema.METHOD_PROMPT_LIST, new PaginatedRequest(cursor), LIST_PROMPTS_RESULT_TYPE_REF));
+	}
+
+	/**
+	 * Retrieves a paginated list of prompts with optional metadata.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return A Mono that completes with the list of prompts result.
+	 * @see McpSchema.ListPromptsResult
+	 * @see #getPrompt(GetPromptRequest)
+	 */
+	public Mono<ListPromptsResult> listPrompts(String cursor, Map<String, Object> meta) {
+		return this.listPromptsInternal(cursor, meta);
+	}
+
+	private Mono<ListPromptsResult> listPromptsInternal(String cursor, Map<String, Object> meta) {
+		return this.initializer.withInitialization("listing prompts",
+				init -> init.mcpSession()
+					.sendRequest(McpSchema.METHOD_PROMPT_LIST, new PaginatedRequest(cursor, meta),
+							LIST_PROMPTS_RESULT_TYPE_REF));
 	}
 
 	/**

mcp-core/src/main/java/io/modelcontextprotocol/client/McpSyncClient.java

@@ -5,6 +5,7 @@
 package io.modelcontextprotocol.client;
 
 import java.time.Duration;
+import java.util.Map;
 import java.util.function.Supplier;
 
 import org.slf4j.Logger;
@@ -259,6 +260,18 @@ public class McpSyncClient implements AutoCloseable {
 
 	}
 
+	/**
+	 * Retrieves a paginated list of tools provided by the server.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return The list of tools result containing: - tools: List of available tools, each
+	 * with a name, description, and input schema - nextCursor: Optional cursor for
+	 * pagination if more tools are available
+	 */
+	public McpSchema.ListToolsResult listTools(String cursor, Map<String, Object> meta) {
+		return withProvidedContext(this.delegate.listTools(cursor, meta)).block();
+	}
+
 	// --------------------------
 	// Resources
 	// --------------------------
@@ -282,6 +295,17 @@ public class McpSyncClient implements AutoCloseable {
 
 	}
 
+	/**
+	 * Retrieves a paginated list of resources with optional metadata.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return The list of resources result
+	 */
+	public McpSchema.ListResourcesResult listResources(String cursor, Map<String, Object> meta) {
+		return withProvidedContext(this.delegate.listResources(cursor, meta)).block();
+
+	}
+
 	/**
 	 * Send a resources/read request.
 	 * @param resource the resource to read
@@ -324,6 +348,20 @@ public class McpSyncClient implements AutoCloseable {
 
 	}
 
+	/**
+	 * Resource templates allow servers to expose parameterized resources using URI
+	 * templates. Arguments may be auto-completed through the completion API.
+	 *
+	 * Retrieves a paginated list of resource templates provided by the server.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return The list of resource templates result.
+	 */
+	public McpSchema.ListResourceTemplatesResult listResourceTemplates(String cursor, Map<String, Object> meta) {
+		return withProvidedContext(this.delegate.listResourceTemplates(cursor, meta)).block();
+
+	}
+
 	/**
 	 * Subscriptions. The protocol supports optional subscriptions to resource changes.
 	 * Clients can subscribe to specific resources and receive notifications when they
@@ -370,6 +408,17 @@ public class McpSyncClient implements AutoCloseable {
 
 	}
 
+	/**
+	 * Retrieves a paginated list of prompts provided by the server.
+	 * @param cursor Optional pagination cursor from a previous list request
+	 * @param meta Optional metadata to include in the request (_meta field)
+	 * @return The list of prompts result.
+	 */
+	public ListPromptsResult listPrompts(String cursor, Map<String, Object> meta) {
+		return withProvidedContext(this.delegate.listPrompts(cursor, meta)).block();
+
+	}
+
 	public GetPromptResult getPrompt(GetPromptRequest getPromptRequest) {
 		return withProvidedContext(this.delegate.getPrompt(getPromptRequest)).block();
 	}

mcp-core/src/main/java/io/modelcontextprotocol/client/transport/HttpClientSseClientTransport.java

@@ -241,10 +241,17 @@ public class HttpClientSseClientTransport implements McpClientTransport {
 		}
 
 		/**
-		 * Customizes the HTTP client builder.
+		 * Applies the given consumer to the shared {@link HttpRequest.Builder} <b>once,
+		 * at build time</b>. Any headers set here are frozen into the template and
+		 * <b>cannot be updated</b> after the transport is built.
 		 * @param requestCustomizer the consumer to customize the HTTP request builder
 		 * @return this builder
+		 * @deprecated Use {@link #requestBuilder(HttpRequest.Builder)} for stable
+		 * headers, or {@link #httpRequestCustomizer(McpSyncHttpClientRequestCustomizer)}
+		 * / {@link #asyncHttpRequestCustomizer(McpAsyncHttpClientRequestCustomizer)} for
+		 * dynamic per-request customization.
 		 */
+		@Deprecated
 		public Builder customizeRequest(final Consumer<HttpRequest.Builder> requestCustomizer) {
 			Assert.notNull(requestCustomizer, "requestCustomizer must not be null");
 			requestCustomizer.accept(requestBuilder);
@@ -456,7 +463,7 @@ public class HttpClientSseClientTransport implements McpClientTransport {
 		return Mono.deferContextual(ctx -> {
 			var builder = this.requestBuilder.copy()
 				.uri(requestUri)
-				.header(HttpHeaders.CONTENT_TYPE, "application/json")
+				.header(HttpHeaders.CONTENT_TYPE, "application/json; charset=utf-8")
 				.header(MCP_PROTOCOL_VERSION_HEADER_NAME, MCP_PROTOCOL_VERSION)
 				.POST(HttpRequest.BodyPublishers.ofString(body));
 			var transportContext = ctx.getOrDefault(McpTransportContext.KEY, McpTransportContext.EMPTY);

mcp-core/src/main/java/io/modelcontextprotocol/client/transport/HttpClientStreamableHttpTransport.java

@@ -102,6 +102,8 @@ public class HttpClientStreamableHttpTransport implements McpClientTransport {
 
 	private static final String APPLICATION_JSON = "application/json";
 
+	private static final String APPLICATION_JSON_UTF8 = "application/json; charset=utf-8";
+
 	private static final String TEXT_EVENT_STREAM = "text/event-stream";
 
 	public static int NOT_FOUND = 404;
@@ -298,6 +300,10 @@ public class HttpClientStreamableHttpTransport implements McpClientTransport {
 											"Authorization error connecting to SSE stream",
 											responseEvent.responseInfo()));
 						}
+						else if (statusCode == METHOD_NOT_ALLOWED) {
+							logger.debug("The server does not support SSE streams, using request-response mode.");
+							return Flux.empty();
+						}
 
 						if (!(responseEvent instanceof ResponseSubscribers.SseResponseEvent sseResponseEvent)) {
 							return Flux.<McpSchema.JSONRPCMessage>error(new McpTransportException(
@@ -344,10 +350,6 @@ public class HttpClientStreamableHttpTransport implements McpClientTransport {
 								return Flux.empty();
 							}
 						}
-						else if (statusCode == METHOD_NOT_ALLOWED) { // NotAllowed
-							logger.debug("The server does not support SSE streams, using request-response mode.");
-							return Flux.empty();
-						}
 						else if (statusCode == NOT_FOUND) {
 
 							if (transportSession != null && transportSession.sessionId().isPresent()) {
@@ -477,7 +479,7 @@ public class HttpClientStreamableHttpTransport implements McpClientTransport {
 
 				var builder = requestBuilder.uri(uri)
 					.header(HttpHeaders.ACCEPT, APPLICATION_JSON + ", " + TEXT_EVENT_STREAM)
-					.header(HttpHeaders.CONTENT_TYPE, APPLICATION_JSON)
+					.header(HttpHeaders.CONTENT_TYPE, APPLICATION_JSON_UTF8)
 					.header(HttpHeaders.CACHE_CONTROL, "no-cache")
 					.header(HttpHeaders.PROTOCOL_VERSION,
 							ctx.getOrDefault(McpAsyncClient.NEGOTIATED_PROTOCOL_VERSION,
@@ -738,10 +740,17 @@ public class HttpClientStreamableHttpTransport implements McpClientTransport {
 		}
 
 		/**
-		 * Customizes the HTTP client builder.
+		 * Applies the given consumer to the shared {@link HttpRequest.Builder} <b>once,
+		 * at build time</b>. Any headers set here are frozen into the template and
+		 * <b>cannot be updated</b> after the transport is built.
 		 * @param requestCustomizer the consumer to customize the HTTP request builder
 		 * @return this builder
+		 * @deprecated Use {@link #requestBuilder(HttpRequest.Builder)} for stable
+		 * headers, or {@link #httpRequestCustomizer(McpSyncHttpClientRequestCustomizer)}
+		 * / {@link #asyncHttpRequestCustomizer(McpAsyncHttpClientRequestCustomizer)} for
+		 * dynamic per-request customization.
 		 */
+		@Deprecated
 		public Builder customizeRequest(final Consumer<HttpRequest.Builder> requestCustomizer) {
 			Assert.notNull(requestCustomizer, "requestCustomizer must not be null");
 			requestCustomizer.accept(requestBuilder);

mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletSseServerTransportProvider.java

@@ -286,7 +286,6 @@ public class HttpServletSseServerTransportProvider extends HttpServlet implement
 		response.setCharacterEncoding(UTF_8);
 		response.setHeader("Cache-Control", "no-cache");
 		response.setHeader("Connection", "keep-alive");
-		response.setHeader("Access-Control-Allow-Origin", "*");
 
 		String sessionId = UUID.randomUUID().toString();
 		AsyncContext asyncContext = request.startAsync();

mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletStreamableServerTransportProvider.java

@@ -315,7 +315,6 @@ public class HttpServletStreamableServerTransportProvider extends HttpServlet
 			response.setCharacterEncoding(UTF_8);
 			response.setHeader("Cache-Control", "no-cache");
 			response.setHeader("Connection", "keep-alive");
-			response.setHeader("Access-Control-Allow-Origin", "*");
 
 			AsyncContext asyncContext = request.startAsync();
 			asyncContext.setTimeout(0);
@@ -522,7 +521,6 @@ public class HttpServletStreamableServerTransportProvider extends HttpServlet
 				response.setCharacterEncoding(UTF_8);
 				response.setHeader("Cache-Control", "no-cache");
 				response.setHeader("Connection", "keep-alive");
-				response.setHeader("Access-Control-Allow-Origin", "*");
 
 				AsyncContext asyncContext = request.startAsync();
 				asyncContext.setTimeout(0);

mcp-json-jackson2/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>mcp-json-jackson2</artifactId>
 	<packaging>jar</packaging>
@@ -72,7 +72,7 @@
 		<dependency>
 			<groupId>io.modelcontextprotocol.sdk</groupId>
 			<artifactId>mcp-core</artifactId>
-			<version>1.1.0-SNAPSHOT</version>
+			<version>1.1.2</version>
 		</dependency>
 		<dependency>
 			<groupId>com.networknt</groupId>

mcp-json-jackson3/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>mcp-json-jackson3</artifactId>
 	<packaging>jar</packaging>
@@ -66,7 +66,7 @@
 		<dependency>
 			<groupId>io.modelcontextprotocol.sdk</groupId>
 			<artifactId>mcp-core</artifactId>
-			<version>1.1.0-SNAPSHOT</version>
+			<version>1.1.2</version>
 		</dependency>
 		<dependency>
 			<groupId>tools.jackson.core</groupId>

mcp-test/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>io.modelcontextprotocol.sdk</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>1.1.0-SNAPSHOT</version>
+		<version>1.1.2</version>
 	</parent>
 	<artifactId>mcp-test</artifactId>
 	<packaging>jar</packaging>
@@ -24,7 +24,7 @@
 		<dependency>
 			<groupId>io.modelcontextprotocol.sdk</groupId>
 			<artifactId>mcp-core</artifactId>
-			<version>1.1.0-SNAPSHOT</version>
+			<version>1.1.2</version>
 		</dependency>
 
 		<dependency>
@@ -159,7 +159,7 @@
 				<dependency>
 					<groupId>io.modelcontextprotocol.sdk</groupId>
 					<artifactId>mcp-json-jackson3</artifactId>
-					<version>1.1.0-SNAPSHOT</version>
+					<version>1.1.2</version>
 					<scope>test</scope>
 				</dependency>
 			</dependencies>
@@ -170,7 +170,7 @@
 				<dependency>
 					<groupId>io.modelcontextprotocol.sdk</groupId>
 					<artifactId>mcp-json-jackson2</artifactId>
-					<version>1.1.0-SNAPSHOT</version>
+					<version>1.1.2</version>
 					<scope>test</scope>
 				</dependency>
 			</dependencies>