diff --git a/instrumentation/jmx-metrics/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/jmx/JmxMetricInsightInstaller.java b/instrumentation/jmx-metrics/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/jmx/JmxMetricInsightInstaller.java
index c639cac53f05..267bc031d160 100644
--- a/instrumentation/jmx-metrics/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/jmx/JmxMetricInsightInstaller.java
+++ b/instrumentation/jmx-metrics/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/jmx/JmxMetricInsightInstaller.java
@@ -14,7 +14,7 @@
 import io.opentelemetry.instrumentation.jmx.engine.MetricConfiguration;
 import io.opentelemetry.instrumentation.jmx.yaml.RuleParser;
 import io.opentelemetry.javaagent.extension.AgentListener;
-import io.opentelemetry.javaagent.extension.ConfigPropertiesUtil;
+import io.opentelemetry.javaagent.extension.internal.ConfigPropertiesUtil;
 import io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 import java.io.InputStream;
diff --git a/instrumentation/oshi/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/oshi/OshiMetricsInstaller.java b/instrumentation/oshi/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/oshi/OshiMetricsInstaller.java
index edca2dfdb8dc..028dc7da46ed 100644
--- a/instrumentation/oshi/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/oshi/OshiMetricsInstaller.java
+++ b/instrumentation/oshi/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/oshi/OshiMetricsInstaller.java
@@ -7,7 +7,7 @@
 
 import com.google.auto.service.AutoService;
 import io.opentelemetry.javaagent.extension.AgentListener;
-import io.opentelemetry.javaagent.extension.ConfigPropertiesUtil;
+import io.opentelemetry.javaagent.extension.internal.ConfigPropertiesUtil;
 import io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 import java.lang.reflect.Method;
diff --git a/instrumentation/runtime-telemetry/runtime-telemetry-java8/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/runtimemetrics/java8/JarAnalyzerInstaller.java b/instrumentation/runtime-telemetry/runtime-telemetry-java8/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/runtimemetrics/java8/JarAnalyzerInstaller.java
index 51ac4a7f1bb3..51d18eb32caa 100644
--- a/instrumentation/runtime-telemetry/runtime-telemetry-java8/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/runtimemetrics/java8/JarAnalyzerInstaller.java
+++ b/instrumentation/runtime-telemetry/runtime-telemetry-java8/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/runtimemetrics/java8/JarAnalyzerInstaller.java
@@ -7,7 +7,7 @@
 
 import com.google.auto.service.AutoService;
 import io.opentelemetry.javaagent.bootstrap.InstrumentationHolder;
-import io.opentelemetry.javaagent.extension.ConfigPropertiesUtil;
+import io.opentelemetry.javaagent.extension.internal.ConfigPropertiesUtil;
 import io.opentelemetry.javaagent.tooling.BeforeAgentListener;
 import io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
diff --git a/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/ConfigPropertiesUtil.java b/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/internal/ConfigPropertiesUtil.java
similarity index 87%
rename from javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/ConfigPropertiesUtil.java
rename to javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/internal/ConfigPropertiesUtil.java
index 2e164e71ffb5..914d07d20f36 100644
--- a/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/ConfigPropertiesUtil.java
+++ b/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/internal/ConfigPropertiesUtil.java
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-package io.opentelemetry.javaagent.extension;
+package io.opentelemetry.javaagent.extension.internal;
 
 import io.opentelemetry.api.incubator.config.ConfigProvider;
 import io.opentelemetry.api.incubator.config.DeclarativeConfigProperties;
@@ -11,7 +11,11 @@
 import io.opentelemetry.sdk.autoconfigure.internal.AutoConfigureUtil;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 
-public class ConfigPropertiesUtil {
+/**
+ * This class is internal and is hence not for public use. Its APIs are unstable and can change at
+ * any time.
+ */
+public final class ConfigPropertiesUtil {
   private ConfigPropertiesUtil() {}
 
   /** Resolve {@link ConfigProperties} from the {@code autoConfiguredOpenTelemetrySdk}. */
diff --git a/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/DeclarativeConfigPropertiesBridge.java b/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/internal/DeclarativeConfigPropertiesBridge.java
similarity index 98%
rename from javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/DeclarativeConfigPropertiesBridge.java
rename to javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/internal/DeclarativeConfigPropertiesBridge.java
index 01ad41ef222f..0d4de14c217f 100644
--- a/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/DeclarativeConfigPropertiesBridge.java
+++ b/javaagent-extension-api/src/main/java/io/opentelemetry/javaagent/extension/internal/DeclarativeConfigPropertiesBridge.java
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-package io.opentelemetry.javaagent.extension;
+package io.opentelemetry.javaagent.extension.internal;
 
 import static io.opentelemetry.api.incubator.config.DeclarativeConfigProperties.empty;
 
diff --git a/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/ConfigPropertiesUtilTest.java b/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/internal/ConfigPropertiesUtilTest.java
similarity index 98%
rename from javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/ConfigPropertiesUtilTest.java
rename to javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/internal/ConfigPropertiesUtilTest.java
index 4894b44f6b86..67d2fe5fc568 100644
--- a/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/ConfigPropertiesUtilTest.java
+++ b/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/internal/ConfigPropertiesUtilTest.java
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-package io.opentelemetry.javaagent.extension;
+package io.opentelemetry.javaagent.extension.internal;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.any;
diff --git a/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/DeclarativeConfigPropertiesBridgeTest.java b/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/internal/DeclarativeConfigPropertiesBridgeTest.java
similarity index 99%
rename from javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/DeclarativeConfigPropertiesBridgeTest.java
rename to javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/internal/DeclarativeConfigPropertiesBridgeTest.java
index cd4f032ed187..ba5ca8519352 100644
--- a/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/DeclarativeConfigPropertiesBridgeTest.java
+++ b/javaagent-extension-api/src/test/java/io/opentelemetry/javaagent/extension/internal/DeclarativeConfigPropertiesBridgeTest.java
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-package io.opentelemetry.javaagent.extension;
+package io.opentelemetry.javaagent.extension.internal;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
diff --git a/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/AgentInstaller.java b/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/AgentInstaller.java
index f431334b72c9..d88e6c64dd06 100644
--- a/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/AgentInstaller.java
+++ b/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/AgentInstaller.java
@@ -31,9 +31,9 @@
 import io.opentelemetry.javaagent.bootstrap.internal.AgentInstrumentationConfig;
 import io.opentelemetry.javaagent.bootstrap.internal.ConfiguredResourceAttributesHolder;
 import io.opentelemetry.javaagent.extension.AgentListener;
-import io.opentelemetry.javaagent.extension.ConfigPropertiesUtil;
 import io.opentelemetry.javaagent.extension.ignore.IgnoredTypesConfigurer;
 import io.opentelemetry.javaagent.extension.instrumentation.internal.EarlyInstrumentationModule;
+import io.opentelemetry.javaagent.extension.internal.ConfigPropertiesUtil;
 import io.opentelemetry.javaagent.tooling.asyncannotationsupport.WeakRefAsyncOperationEndStrategies;
 import io.opentelemetry.javaagent.tooling.bootstrap.BootstrapPackagesBuilderImpl;
 import io.opentelemetry.javaagent.tooling.bootstrap.BootstrapPackagesConfigurer;