---
title: Hermes Messaging Service reference
description: Reference topics provide details on the Hermes Messaging Service components and the security model.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-reference.html
release: australia
product: Multi-Instance Framework - Hermes
classification: multi-instance-framework-hermes
topic_type: concept
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Hermes Messaging Service, Manage service capabilities, Extend ServiceNow AI Platform capabilities]
---

# Hermes Messaging Service reference

Reference topics provide details on the Hermes Messaging Service components and the security model.

-   **[Hermes Messaging Service components](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-components.md)**  
The Hermes Messaging Service architecture is built on the following components.
-   **[Hermes Messaging Service security model](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-security-model.md)**  
The Hermes Messaging Service security model relies on the following capabilities.
-   **[Hermes Messaging Service system properties](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-properties.md)**  
These system properties control the behavior of the Hermes Messaging Service.
-   **[Hermes background jobs](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-settings-background-jobs.md)**  
These background jobs are associated with Hermes settings. The table lists their default run frequencies and descriptions.
-   **[Hermes Messaging Service roles](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-roles.md)**  
Hermes Messaging Service is installed with these roles.
-   **[Hermes Messaging Service domain separation](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-domain-separation.md)**  
Domain separation is supported for the Hermes Messaging Service. Domain separation enables you to separate data, processes, and administrative tasks into logical groupings called domains. You can control several aspects of this separation, including which users can see and access data.

**Parent Topic:**[Manage service capabilities](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/manage-services.md)