diff --git a/mcp-core/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.java b/mcp-core/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.java
index fc1f8a47c..91e5adc2c 100644
--- a/mcp-core/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.java
+++ b/mcp-core/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.java
@@ -138,7 +138,7 @@ public class McpAsyncServer {
 		this.mcpTransportProvider = mcpTransportProvider;
 		this.jsonMapper = jsonMapper;
 		this.serverInfo = features.serverInfo();
-		this.serverCapabilities = features.serverCapabilities().mutate().logging().build();
+		this.serverCapabilities = features.serverCapabilities();
 		this.instructions = features.instructions();
 		this.tools.addAll(withStructuredOutputHandling(jsonSchemaValidator, features.tools()));
 		this.resources.putAll(features.resources());
@@ -170,7 +170,7 @@ public class McpAsyncServer {
 		this.mcpTransportProvider = mcpTransportProvider;
 		this.jsonMapper = jsonMapper;
 		this.serverInfo = features.serverInfo();
-		this.serverCapabilities = features.serverCapabilities().mutate().logging().build();
+		this.serverCapabilities = features.serverCapabilities();
 		this.instructions = features.instructions();
 		this.tools.addAll(withStructuredOutputHandling(jsonSchemaValidator, features.tools()));
 		this.resources.putAll(features.resources());
diff --git a/mcp-core/src/test/java/io/modelcontextprotocol/server/McpAsyncServerTests.java b/mcp-core/src/test/java/io/modelcontextprotocol/server/McpAsyncServerTests.java
new file mode 100644
index 000000000..f801b4199
--- /dev/null
+++ b/mcp-core/src/test/java/io/modelcontextprotocol/server/McpAsyncServerTests.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2024-2026 the original author or authors.
+ */
+
+package io.modelcontextprotocol.server;
+
+import io.modelcontextprotocol.json.McpJsonMapper;
+import io.modelcontextprotocol.json.schema.JsonSchemaValidator;
+import io.modelcontextprotocol.spec.McpSchema;
+import io.modelcontextprotocol.spec.McpServerTransportProvider;
+import io.modelcontextprotocol.spec.McpStreamableServerTransportProvider;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+class McpAsyncServerTests {
+
+	@Test
+	void singleSessionServerPreservesExplicitCapabilities() {
+		McpSchema.ServerCapabilities capabilities = McpSchema.ServerCapabilities.builder().tools(true).build();
+
+		McpAsyncServer server = McpServer.async(mock(McpServerTransportProvider.class))
+			.capabilities(capabilities)
+			.jsonMapper(mock(McpJsonMapper.class))
+			.jsonSchemaValidator(mock(JsonSchemaValidator.class))
+			.build();
+
+		assertThat(server.getServerCapabilities()).isEqualTo(capabilities);
+	}
+
+	@Test
+	void streamableServerPreservesExplicitCapabilities() {
+		McpSchema.ServerCapabilities capabilities = McpSchema.ServerCapabilities.builder().tools(true).build();
+
+		McpAsyncServer server = McpServer.async(mock(McpStreamableServerTransportProvider.class))
+			.capabilities(capabilities)
+			.jsonMapper(mock(McpJsonMapper.class))
+			.jsonSchemaValidator(mock(JsonSchemaValidator.class))
+			.build();
+
+		assertThat(server.getServerCapabilities()).isEqualTo(capabilities);
+	}
+
+}