---
title: Hermes Messaging Service system properties
description: These system properties control the behavior of the Hermes Messaging Service.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-properties.html
release: australia
product: Multi-Instance Framework - Hermes
classification: multi-instance-framework-hermes
topic_type: reference
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Reference, Hermes Messaging Service, Manage service capabilities, Extend ServiceNow AI Platform capabilities]
---

# Hermes Messaging Service system properties

These system properties control the behavior of the Hermes Messaging Service.

To set Hermes Messaging Service system properties, navigate to the System Properties \[sys\_properties\] table and add the property.

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Encoding format for message payload in the Hermes Messaging Service topic inspector

 `glide.hermes.topic.inspector.payload.format`

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By default, messages in the **Payload** column are displayed as strings in UTF8. You can display binary data using base-64 encoding by adding this system property and setting the value to binary.-   string: display message payload in UTF8
-   binary: display message payload in base64

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Encoding format for message keys in the Hermes Messaging Service topic inspector

 `glide.hermes.topic.inspector.key.format`

</td><td>

By default, identifiers in the **Keys** column are displayed as strings in UTF8. You can display binary data using base-64 encoding by adding this system property and setting the value to binary.-   string: display keys in UTF8
-   binary: display keys in base64

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</table>**Parent Topic:**[Hermes Messaging Service reference](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/multi-instance-framework-hermes/hermes-messaging-service-reference.md)

**Related topics**  


[Hermes Messaging Service components]()

[Hermes Messaging Service security model]()

[Hermes background jobs]()

[Hermes Messaging Service roles]()

[Hermes Messaging Service domain separation]()