diff --git a/x-pack/plugins/actions/server/plugin.ts b/x-pack/plugins/actions/server/plugin.ts
index 69ccd33729f81..5c50417172c0a 100644
--- a/x-pack/plugins/actions/server/plugin.ts
+++ b/x-pack/plugins/actions/server/plugin.ts
@@ -19,7 +19,6 @@ import {
   SavedObjectsServiceStart,
   ElasticsearchServiceStart,
   IClusterClient,
-  ClusterClient,
 } from '../../../../src/core/server';
 
 import {
@@ -300,9 +299,6 @@ export class ActionsPlugin implements Plugin<Promise<PluginSetupContract>, Plugi
       callCluster: elasticsearch.legacy.client.asScoped(request).callAsCurrentUser,
       savedObjectsClient: savedObjects.getScopedClient(request),
       getScopedCallCluster(clusterClient: IClusterClient) {
-        if (!(clusterClient instanceof ClusterClient)) {
-          throw new Error('given clusterClient is not an instance of ClusterClient');
-        }
         return clusterClient.asScoped(request).callAsCurrentUser;
       },
     });
diff --git a/x-pack/plugins/alerting/server/plugin.ts b/x-pack/plugins/alerting/server/plugin.ts
index 9fb6bd41e9ca1..c03d3506a051d 100644
--- a/x-pack/plugins/alerting/server/plugin.ts
+++ b/x-pack/plugins/alerting/server/plugin.ts
@@ -30,7 +30,6 @@ import {
   SharedGlobalConfig,
   ElasticsearchServiceStart,
   IClusterClient,
-  ClusterClient,
 } from '../../../../src/core/server';
 
 import {
@@ -273,9 +272,6 @@ export class AlertingPlugin {
       callCluster: elasticsearch.legacy.client.asScoped(request).callAsCurrentUser,
       savedObjectsClient: savedObjects.getScopedClient(request),
       getScopedCallCluster(clusterClient: IClusterClient) {
-        if (!(clusterClient instanceof ClusterClient)) {
-          throw new Error('given clusterClient is not an instance of ClusterClient');
-        }
         return clusterClient.asScoped(request).callAsCurrentUser;
       },
     });
diff --git a/x-pack/test/alerting_api_integration/common/fixtures/plugins/alerts/index.ts b/x-pack/test/alerting_api_integration/common/fixtures/plugins/alerts/index.ts
index fe0f630830a56..43d533ad3ae14 100644
--- a/x-pack/test/alerting_api_integration/common/fixtures/plugins/alerts/index.ts
+++ b/x-pack/test/alerting_api_integration/common/fixtures/plugins/alerts/index.ts
@@ -14,6 +14,7 @@ export default function(kibana: any) {
     require: ['xpack_main', 'actions', 'alerting', 'elasticsearch'],
     name: 'alerts',
     init(server: any) {
+      const clusterClient = server.newPlatform.start.core.elasticsearch.legacy.client;
       server.plugins.xpack_main.registerFeature({
         id: 'alerting',
         name: 'Alerting',
@@ -165,6 +166,22 @@ export default function(kibana: any) {
           } catch (e) {
             callClusterError = e;
           }
+          // Call scoped cluster
+          const callScopedCluster = services.getScopedCallCluster(clusterClient);
+          let callScopedClusterSuccess = false;
+          let callScopedClusterError;
+          try {
+            await callScopedCluster('index', {
+              index: params.callClusterAuthorizationIndex,
+              refresh: 'wait_for',
+              body: {
+                param1: 'test',
+              },
+            });
+            callScopedClusterSuccess = true;
+          } catch (e) {
+            callScopedClusterError = e;
+          }
           // Saved objects client
           let savedObjectsClientSuccess = false;
           let savedObjectsClientError;
@@ -185,6 +202,8 @@ export default function(kibana: any) {
               state: {
                 callClusterSuccess,
                 callClusterError,
+                callScopedClusterSuccess,
+                callScopedClusterError,
                 savedObjectsClientSuccess,
                 savedObjectsClientError,
               },
@@ -376,6 +395,22 @@ export default function(kibana: any) {
           } catch (e) {
             callClusterError = e;
           }
+          // Call scoped cluster
+          const callScopedCluster = services.getScopedCallCluster(clusterClient);
+          let callScopedClusterSuccess = false;
+          let callScopedClusterError;
+          try {
+            await callScopedCluster('index', {
+              index: params.callClusterAuthorizationIndex,
+              refresh: 'wait_for',
+              body: {
+                param1: 'test',
+              },
+            });
+            callScopedClusterSuccess = true;
+          } catch (e) {
+            callScopedClusterError = e;
+          }
           // Saved objects client
           let savedObjectsClientSuccess = false;
           let savedObjectsClientError;
@@ -396,6 +431,8 @@ export default function(kibana: any) {
               state: {
                 callClusterSuccess,
                 callClusterError,
+                callScopedClusterSuccess,
+                callScopedClusterError,
                 savedObjectsClientSuccess,
                 savedObjectsClientError,
               },
diff --git a/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/execute.ts b/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/execute.ts
index a58e14dd563ef..af8af72d458fd 100644
--- a/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/execute.ts
+++ b/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/execute.ts
@@ -436,11 +436,16 @@ export default function({ getService }: FtrProviderContext) {
               indexedRecord = searchResult.hits.hits[0];
               expect(indexedRecord._source.state).to.eql({
                 callClusterSuccess: false,
+                callScopedClusterSuccess: false,
                 savedObjectsClientSuccess: false,
                 callClusterError: {
                   ...indexedRecord._source.state.callClusterError,
                   statusCode: 403,
                 },
+                callScopedClusterError: {
+                  ...indexedRecord._source.state.callScopedClusterError,
+                  statusCode: 403,
+                },
                 savedObjectsClientError: {
                   ...indexedRecord._source.state.savedObjectsClientError,
                   output: {
@@ -457,6 +462,7 @@ export default function({ getService }: FtrProviderContext) {
               indexedRecord = searchResult.hits.hits[0];
               expect(indexedRecord._source.state).to.eql({
                 callClusterSuccess: true,
+                callScopedClusterSuccess: true,
                 savedObjectsClientSuccess: false,
                 savedObjectsClientError: {
                   ...indexedRecord._source.state.savedObjectsClientError,
diff --git a/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/alerts.ts b/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/alerts.ts
index d8e4f808f5cd2..59cf22b52920c 100644
--- a/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/alerts.ts
+++ b/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/alerts.ts
@@ -469,11 +469,16 @@ instanceStateValue: true
               expect(searchResult.hits.total.value).to.eql(1);
               expect(searchResult.hits.hits[0]._source.state).to.eql({
                 callClusterSuccess: false,
+                callScopedClusterSuccess: false,
                 savedObjectsClientSuccess: false,
                 callClusterError: {
                   ...searchResult.hits.hits[0]._source.state.callClusterError,
                   statusCode: 403,
                 },
+                callScopedClusterError: {
+                  ...searchResult.hits.hits[0]._source.state.callScopedClusterError,
+                  statusCode: 403,
+                },
                 savedObjectsClientError: {
                   ...searchResult.hits.hits[0]._source.state.savedObjectsClientError,
                   output: {
@@ -497,6 +502,7 @@ instanceStateValue: true
               expect(searchResult.hits.total.value).to.eql(1);
               expect(searchResult.hits.hits[0]._source.state).to.eql({
                 callClusterSuccess: true,
+                callScopedClusterSuccess: true,
                 savedObjectsClientSuccess: false,
                 savedObjectsClientError: {
                   ...searchResult.hits.hits[0]._source.state.savedObjectsClientError,
@@ -577,11 +583,16 @@ instanceStateValue: true
               expect(searchResult.hits.total.value).to.eql(1);
               expect(searchResult.hits.hits[0]._source.state).to.eql({
                 callClusterSuccess: false,
+                callScopedClusterSuccess: false,
                 savedObjectsClientSuccess: false,
                 callClusterError: {
                   ...searchResult.hits.hits[0]._source.state.callClusterError,
                   statusCode: 403,
                 },
+                callScopedClusterError: {
+                  ...searchResult.hits.hits[0]._source.state.callScopedClusterError,
+                  statusCode: 403,
+                },
                 savedObjectsClientError: {
                   ...searchResult.hits.hits[0]._source.state.savedObjectsClientError,
                   output: {
@@ -605,6 +616,7 @@ instanceStateValue: true
               expect(searchResult.hits.total.value).to.eql(1);
               expect(searchResult.hits.hits[0]._source.state).to.eql({
                 callClusterSuccess: true,
+                callScopedClusterSuccess: true,
                 savedObjectsClientSuccess: false,
                 savedObjectsClientError: {
                   ...searchResult.hits.hits[0]._source.state.savedObjectsClientError,
diff --git a/x-pack/test/alerting_api_integration/spaces_only/tests/actions/execute.ts b/x-pack/test/alerting_api_integration/spaces_only/tests/actions/execute.ts
index 3faa54ee0b219..715573ef1237e 100644
--- a/x-pack/test/alerting_api_integration/spaces_only/tests/actions/execute.ts
+++ b/x-pack/test/alerting_api_integration/spaces_only/tests/actions/execute.ts
@@ -186,6 +186,7 @@ export default function({ getService }: FtrProviderContext) {
       const indexedRecord = searchResult.hits.hits[0];
       expect(indexedRecord._source.state).to.eql({
         callClusterSuccess: true,
+        callScopedClusterSuccess: true,
         savedObjectsClientSuccess: false,
         savedObjectsClientError: {
           ...indexedRecord._source.state.savedObjectsClientError,
diff --git a/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/alerts_base.ts b/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/alerts_base.ts
index 0d1596a95bfbb..95ccfb897cf54 100644
--- a/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/alerts_base.ts
+++ b/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/alerts_base.ts
@@ -277,6 +277,7 @@ instanceStateValue: true
       )[0];
       expect(alertTestRecord._source.state).to.eql({
         callClusterSuccess: true,
+        callScopedClusterSuccess: true,
         savedObjectsClientSuccess: false,
         savedObjectsClientError: {
           ...alertTestRecord._source.state.savedObjectsClientError,
@@ -332,6 +333,7 @@ instanceStateValue: true
       )[0];
       expect(actionTestRecord._source.state).to.eql({
         callClusterSuccess: true,
+        callScopedClusterSuccess: true,
         savedObjectsClientSuccess: false,
         savedObjectsClientError: {
           ...actionTestRecord._source.state.savedObjectsClientError,