diff --git a/flint-core/src/main/scala/org/opensearch/flint/core/FlintClient.java b/flint-core/src/main/scala/org/opensearch/flint/core/FlintClient.java
index 8ee4903d1..b4271360c 100644
--- a/flint-core/src/main/scala/org/opensearch/flint/core/FlintClient.java
+++ b/flint-core/src/main/scala/org/opensearch/flint/core/FlintClient.java
@@ -5,12 +5,11 @@
 
 package org.opensearch.flint.core;
 
+import java.util.List;
 import org.opensearch.flint.core.metadata.FlintMetadata;
 import org.opensearch.flint.core.storage.FlintReader;
 import org.opensearch.flint.core.storage.FlintWriter;
 
-import java.io.Writer;
-
 /**
  * Flint index client that provides API for metadata and data operations
  * on a Flint index regardless of concrete storage.
@@ -33,6 +32,14 @@ public interface FlintClient {
    */
   boolean exists(String indexName);
 
+  /**
+   * Retrieve all metadata for Flint index whose name matches the given pattern.
+   *
+   * @param indexNamePattern index name pattern
+   * @return all matched index metadata
+   */
+  List<FlintMetadata> getAllIndexMetadata(String indexNamePattern);
+
   /**
    * Retrieve metadata in a Flint index.
    *
diff --git a/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java b/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java
index bc58a7c5e..4e3c5a76c 100644
--- a/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java
+++ b/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java
@@ -5,9 +5,17 @@
 
 package org.opensearch.flint.core.storage;
 
+import static org.opensearch.common.xcontent.DeprecationHandler.IGNORE_DEPRECATIONS;
+
 import com.amazonaws.auth.AWS4Signer;
 import com.amazonaws.auth.AWSCredentialsProvider;
 import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.stream.Collectors;
 import org.apache.http.HttpHost;
 import org.opensearch.action.admin.indices.delete.DeleteIndexRequest;
 import org.opensearch.client.RequestOptions;
@@ -34,13 +42,6 @@
 import org.opensearch.search.SearchModule;
 import org.opensearch.search.builder.SearchSourceBuilder;
 
-import java.io.IOException;
-import java.lang.reflect.Constructor;
-import java.util.ArrayList;
-import java.util.concurrent.atomic.AtomicReference;
-
-import static org.opensearch.common.xcontent.DeprecationHandler.IGNORE_DEPRECATIONS;
-
 /**
  * Flint client implementation for OpenSearch storage.
  */
@@ -79,6 +80,19 @@ public FlintOpenSearchClient(FlintOptions options) {
     }
   }
 
+  @Override public List<FlintMetadata> getAllIndexMetadata(String indexNamePattern) {
+    try (RestHighLevelClient client = createClient()) {
+      GetMappingsRequest request = new GetMappingsRequest().indices(indexNamePattern);
+      GetMappingsResponse response = client.indices().getMapping(request, RequestOptions.DEFAULT);
+
+      return response.mappings().values().stream()
+          .map(mapping -> new FlintMetadata(mapping.source().string()))
+          .collect(Collectors.toList());
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to get Flint index metadata for " + indexNamePattern, e);
+    }
+  }
+
   @Override public FlintMetadata getIndexMetadata(String indexName) {
     try (RestHighLevelClient client = createClient()) {
       GetMappingsRequest request = new GetMappingsRequest().indices(indexName);
diff --git a/integ-test/src/test/scala/org/opensearch/flint/core/FlintOpenSearchClientSuite.scala b/integ-test/src/test/scala/org/opensearch/flint/core/FlintOpenSearchClientSuite.scala
index 91ec25c24..72fa1e116 100644
--- a/integ-test/src/test/scala/org/opensearch/flint/core/FlintOpenSearchClientSuite.scala
+++ b/integ-test/src/test/scala/org/opensearch/flint/core/FlintOpenSearchClientSuite.scala
@@ -43,6 +43,13 @@ class FlintOpenSearchClientSuite extends AnyFlatSpec with OpenSearchSuite with M
     flintClient.getIndexMetadata(indexName).getContent should matchJson(content)
   }
 
+  it should "get all index metadata with the given index name pattern" in {
+    flintClient.createIndex("flint_test_1_index", new FlintMetadata("{}"))
+    flintClient.createIndex("flint_test_2_index", new FlintMetadata("{}"))
+
+    flintClient.getAllIndexMetadata("flint_*_index") should have size 2
+  }
+
   it should "return false if index not exist" in {
     flintClient.exists("non-exist-index") shouldBe false
   }