+^^^^^^
+
+Go to the MSB interface with a browser, using the address ``http://${msb-ip}:${msb-port}/iui/microservices/default.html``. Select the "API Service" tab (which is opened by default), then you can see all the registered microservices. Click on the microservice block of which the name is *holmes-rule-mgmt* and the APIs will be displayed in the browser. Select the corresponding interface and details will be expanded. Users could use the interface to send http request to the Holmes server to perform health check or other operations on the rules.
+
+.. image:: images/swagger-gui-for-holmes.png
+
+**Direct calling of the APIs in the engine management module of Holmes is not recommended becasue it would cause data inconsistency between the rule managment module and the engine management module. All rules related operations should be only conducted on the rule management module.**