docs: improve getting started experience

README.md

@@ -87,6 +87,14 @@ Use your Atlas API Service Accounts credentials. Must follow all the steps in [A
 }
 ```
 
+### Option 3: Standalone Service using command arguments
+
+Start Server using npx command:
+
+```shell
+ npx -y mongodb-mcp-server --apiClientId="your-atlas-service-accounts-client-id" --apiClientSecret="your-atlas-service-accounts-client-secret" --logPath=dev-logs
+```
+
 #### Other options
 
 Alternatively you can use environment variables in the config file or set them and run the server via npx.