diff --git a/backend/sdk/src/main/java/com/alibaba/higress/sdk/model/ServiceSource.java b/backend/sdk/src/main/java/com/alibaba/higress/sdk/model/ServiceSource.java
index 8340d64a..f14898da 100644
--- a/backend/sdk/src/main/java/com/alibaba/higress/sdk/model/ServiceSource.java
+++ b/backend/sdk/src/main/java/com/alibaba/higress/sdk/model/ServiceSource.java
@@ -48,6 +48,11 @@ public class ServiceSource implements VersionedDto {
     private static final Set<String> PROXY_SUPPORTED_REGISTRY_TYPES =
         ImmutableSet.of(V1McpBridge.REGISTRY_TYPE_STATIC, V1McpBridge.REGISTRY_TYPE_DNS);
 
+    private static final Set<String> ALLOWABLE_TYPES =
+            ImmutableSet.of(V1McpBridge.REGISTRY_TYPE_NACOS, V1McpBridge.REGISTRY_TYPE_NACOS2,
+                    V1McpBridge.REGISTRY_TYPE_NACOS3, V1McpBridge.REGISTRY_TYPE_ZK, V1McpBridge.REGISTRY_TYPE_CONSUL,
+                    V1McpBridge.REGISTRY_TYPE_EUREKA, V1McpBridge.REGISTRY_TYPE_STATIC, V1McpBridge.REGISTRY_TYPE_DNS);
+
     static {
         VALIDATORS.put(V1McpBridge.REGISTRY_TYPE_NACOS, new NacosServiceSourceValidator());
         VALIDATORS.put(V1McpBridge.REGISTRY_TYPE_NACOS2, new NacosServiceSourceValidator());
@@ -112,6 +117,11 @@ public boolean isValid() {
             return false;
         }
 
+        // Check if type is within allowable values
+        if (!ALLOWABLE_TYPES.contains(this.type)) {
+            return false;
+        }
+
         if (this.getPort() == null || !ValidateUtil.checkPort(this.getPort())) {
             return false;
         }