--- title: "RabbitMQ Events: Changes to Categories " description: The article below will detail what can be seen in the Changes to Categories events in your Content Catalyst RabbitMQ feed. --- [Skip to content](https://guide.contentcatalyst.com/rabbitmq-changes-to-categories#main-content) ![CC logo blue-1 (1)](https://guide.contentcatalyst.com/hs-fs/hubfs/CC%20logo%20blue-1%20(1).png?width=200&height=89&name=CC%20logo%20blue-1%20(1).png) - [Guide & Help](https://guide.contentcatalyst.com/) - [Main Website](https://contentcatalyst.com/) - [Go to Customer Portal](https://guide.contentcatalyst.com/tickets-view) Open main navigation Close main navigation - [Guide & Help](https://guide.contentcatalyst.com/) - [Main Website](https://contentcatalyst.com/) - [Go to Customer Portal](https://guide.contentcatalyst.com/tickets-view) - [Main Website](https://contentcatalyst.com/) [Main Website](https://contentcatalyst.com/) Learn all about the platform - There are no suggestions because the search field is empty. 1. [Guide & Help](https://guide.contentcatalyst.com/?hsLang=en) 2. [RabbitMQ](https://guide.contentcatalyst.com/rabbitmq?hsLang=en) 3. [RabbitMQ: Events](https://guide.contentcatalyst.com/rabbitmq?hsLang=en#rabbitmq-events) # RabbitMQ Events: Changes to Categories  ## The article below will detail what can be seen in the Changes to Categories - related events in your Content Catalyst RabbitMQ feed. ### Changes to Categories ``` category.changes ``` Sent when the category tree changes on the system. The new category tree can be found with a `GET` from **~/api/v1/categories** In order to determine what aspects of the category tree have changed you will need to compare the results of that API call to the results you received previously. Category codes can be used to help identify what changes have been made but be aware that it is possible to change the code of a category. When the category tree structure changes the identifiers of the categories can change and so the identifiers given in the **~/api/v1/libraries/reports/products/{productCode}/categories** endpoint may also change in response to this event. So you will need to refresh any caches of that data in response to this event. This event does not include a message body.   - [Setting Up Your Content Catalyst Subscriber Portal](https://guide.contentcatalyst.com/setting-up-your-content-catalyst-subscriber-portal?hsLang=en#main-content) - [Onboarding](https://guide.contentcatalyst.com/setting-up-your-content-catalyst-subscriber-portal?hsLang=en#onboarding) - [Site Options](https://guide.contentcatalyst.com/setting-up-your-content-catalyst-subscriber-portal?hsLang=en#site-options) - [Showcase Page](https://guide.contentcatalyst.com/setting-up-your-content-catalyst-subscriber-portal?hsLang=en#showcase-page) - [Export Template Customisation & Branding](https://guide.contentcatalyst.com/setting-up-your-content-catalyst-subscriber-portal?hsLang=en#export-template-customisation-branding) - [Site Design & Branding](https://guide.contentcatalyst.com/setting-up-your-content-catalyst-subscriber-portal?hsLang=en#site-design-branding) - [Site Authentication & User Registration](https://guide.contentcatalyst.com/site-authentication-user-registration?hsLang=en#main-content) - [Site Access](https://guide.contentcatalyst.com/site-authentication-user-registration?hsLang=en#site-access) - [User Registration](https://guide.contentcatalyst.com/site-authentication-user-registration?hsLang=en#user-registration) - [SSO](https://guide.contentcatalyst.com/site-authentication-user-registration?hsLang=en#sso) - [Account & User Management](https://guide.contentcatalyst.com/account-user-management?hsLang=en#main-content) - [Account Creation & Management](https://guide.contentcatalyst.com/account-user-management?hsLang=en#account-creation-management) - [User Creation & Management](https://guide.contentcatalyst.com/account-user-management?hsLang=en#user-creation-management) - [Security](https://guide.contentcatalyst.com/account-user-management?hsLang=en#security) - [Account Manager Creation & Management](https://guide.contentcatalyst.com/account-user-management?hsLang=en#account-manager-creation-management) - [Guest Access](https://guide.contentcatalyst.com/account-user-management?hsLang=en#guest-access) - [Licensing & Access Management](https://guide.contentcatalyst.com/licensing-access-management?hsLang=en#main-content) - [Creating & Managing Licenses](https://guide.contentcatalyst.com/licensing-access-management?hsLang=en#creating-managing-licenses) - [Prevent Full Downloads](https://guide.contentcatalyst.com/licensing-access-management?hsLang=en#prevent-full-downloads) - [Remote Access](https://guide.contentcatalyst.com/licensing-access-management?hsLang=en#remote-access) - [Restrict Export Formats](https://guide.contentcatalyst.com/licensing-access-management?hsLang=en#restrict-export-formats) - [Organise, Categorise, and Link Content](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#main-content) - [Creating & Managing Category Trees](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#creating-managing-category-trees) - [Configuring Category Landing Pages](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#configuring-category-landing-pages) - [Category & Report Covers](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#category-report-covers) - [Chapters & Sections](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#chapters-sections) - [Analysts](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#analysts) - [Tags](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#tags) - [Report Series & Linked Reports](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#report-series-linked-reports) - [Promote Categories](https://guide.contentcatalyst.com/organise-categorise-and-link-content?hsLang=en#promote-categories) - [Create & Deliver Content and Data](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#main-content) - [Report Metadata](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#report-metadata) - [Importing Content](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#importing-content) - [Instant Insights/Briefings](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#instant-insights-briefings) - [Interactive Docs](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#interactive-docs) - [DocuViewer](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#docuviewer) - [PDF/SlideViewer](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#pdf-slideviewer) - [Power BI](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#power-bi) - [Video Content](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#video-content) - [External Reports](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#external-reports) - [Publishing Workflow](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#publishing-workflow) - [DataViewer](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#dataviewer) - [RSS Feeds](https://guide.contentcatalyst.com/create-deliver-content-and-data?hsLang=en#rss-feeds) - [Operations & Administration support](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#main-content) - [Domain Configuration](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#domain-configuration) - [Email Deliverability](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#email-deliverability) - [Search Configuration](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#search-configuration) - [Chargeback Codes](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#chargeback-codes) - [Policies & Notices](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#policies-notices) - [API](https://guide.contentcatalyst.com/operations-administration-support?hsLang=en#api) - [Site Extensions & Integrations](https://guide.contentcatalyst.com/site-extensions-integrations?hsLang=en#main-content) - [CRM Integrations](https://guide.contentcatalyst.com/site-extensions-integrations?hsLang=en#crm-integrations) - [Integrations](https://guide.contentcatalyst.com/site-extensions-integrations?hsLang=en#integrations) - [Tracking & Analytics of Subscriber Use](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#main-content) - [General](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#general) - [Report Access](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#report-access) - [Popular Searches](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#popular-searches) - [Tracking Snippets](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#tracking-snippets) - [Account Statistics](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#account-statistics) - [Analytics Sales Leads](https://guide.contentcatalyst.com/tracking-analytics-of-subscriber-use?hsLang=en#analytics-sales-leads) - [Sales & Marketing](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#main-content) - [Email Customisation & Branding](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#email-customisation-branding) - [Buy It Now](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#buy-it-now) - [Instant Access Links](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#instant-access-links) - [Search Engine Verification](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#search-engine-verification) - [Trials](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#trials) - [Personalised Content Notifications](https://guide.contentcatalyst.com/sales-marketing?hsLang=en#personalised-content-notifications) - [Content Discovery](https://guide.contentcatalyst.com/content-discovery?hsLang=en#main-content) - [Site Navigation](https://guide.contentcatalyst.com/content-discovery?hsLang=en#site-navigation) - [End-User Search](https://guide.contentcatalyst.com/content-discovery?hsLang=en#end-user-search) - [Categories & Tags](https://guide.contentcatalyst.com/content-discovery?hsLang=en#categories-tags) - [MyCatalyst](https://guide.contentcatalyst.com/content-discovery?hsLang=en#mycatalyst) - [End-User Actions](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#main-content) - [Share Briefing](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#share-briefing) - [Ask The Analyst](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#ask-the-analyst) - [Collate & Export Content](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#collate-export-content) - [Share](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#share) - [Notes](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#notes) - [Translation](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#translation) - [User Profile](https://guide.contentcatalyst.com/end-user-actions?hsLang=en#user-profile) - [RabbitMQ](https://guide.contentcatalyst.com/rabbitmq?hsLang=en#main-content) - [How to Use Rabbit MQ](https://guide.contentcatalyst.com/rabbitmq?hsLang=en#how-to-use-rabbit-mq) - [RabbitMQ: Events](https://guide.contentcatalyst.com/rabbitmq?hsLang=en#rabbitmq-events) - [Main Website](https://contentcatalyst.com/) - [Go to Customer Portal](https://guide.contentcatalyst.com/tickets-view) - [Release Notes](https://guide.contentcatalyst.com/release-notes) - [Raise a Ticket](https://guide.contentcatalyst.com/tickets-view/new?) [![CC logo blue-1 (1)](https://guide.contentcatalyst.com/hs-fs/hubfs/CC%20logo%20blue-1%20(1).png?width=100&height=44&name=CC%20logo%20blue-1%20(1).png "CC logo blue-1 (1)")](http://contentcatalyst.com) Energise your insights Copyright © 2025, Content Catalyst Ltd.