diff --git a/src/main/java/com/eactive/apim/portal/obp/repository/ObpGwMetricRepository.java b/src/main/java/com/eactive/apim/portal/obp/repository/ObpGwMetricRepository.java
new file mode 100644
index 0000000..17fbecc
--- /dev/null
+++ b/src/main/java/com/eactive/apim/portal/obp/repository/ObpGwMetricRepository.java
@@ -0,0 +1,44 @@
+package com.eactive.apim.portal.obp.repository;
+
+import com.eactive.apim.portal.obp.entity.ObpGwMetric;
+import com.eactive.eai.data.jpa.BaseRepository;
+import com.eactive.eai.rms.data.EMSDataSource;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * ObpGwMetric Repository
+ * API Gateway 시간별 거래량 지표 조회/저장
+ */
+@EMSDataSource
+public interface ObpGwMetricRepository extends BaseRepository<ObpGwMetric, String> {
+
+    /**
+     * UPSERT 판단을 위한 기존 데이터 조회
+     * Unique Key: (timeslice, api_id, client_id, hostname, org_id)
+     */
+    Optional<ObpGwMetric> findByTimesliceAndApiIdAndClientIdAndHostnameAndOrgId(
+            LocalDateTime timeslice,
+            String apiId,
+            String clientId,
+            String hostname,
+            String orgId
+    );
+
+    /**
+     * 특정 시간대의 모든 지표 조회 (REST API 용)
+     */
+    List<ObpGwMetric> findByTimeslice(LocalDateTime timeslice);
+
+    /**
+     * 특정 시간대 범위의 지표 조회
+     */
+    List<ObpGwMetric> findByTimesliceBetween(LocalDateTime startTime, LocalDateTime endTime);
+
+    /**
+     * API ID로 지표 조회
+     */
+    List<ObpGwMetric> findByApiIdAndTimeslice(String apiId, LocalDateTime timeslice);
+}