diff --git a/src/main/java/net/onrc/onos/core/intent/runtime/IPathCalcRuntimeService.java b/src/main/java/net/onrc/onos/core/intent/runtime/IPathCalcRuntimeService.java
new file mode 100644
index 0000000..c6aad89
--- /dev/null
+++ b/src/main/java/net/onrc/onos/core/intent/runtime/IPathCalcRuntimeService.java
@@ -0,0 +1,15 @@
+package net.onrc.onos.core.intent.runtime;
+
+import net.floodlightcontroller.core.module.IFloodlightService;
+import net.onrc.onos.core.intent.IntentMap;
+import net.onrc.onos.core.intent.IntentOperationList;
+
+/**
+ * @author Toshio Koide (t-koide@onlab.us)
+ */
+public interface IPathCalcRuntimeService extends IFloodlightService {
+	public IntentOperationList executeIntentOperations(IntentOperationList list);
+	public IntentMap getHighLevelIntents();
+	public IntentMap getPathIntents();
+	public void purgeIntents();
+}