HubSpot Developer Changelog

The contentType header for JavaScript and HTML in the Files tool is changing

Live: August 17, 2020

The contentType header for JavaScript and HTML served from the default HubSpot File Manager CDN is changing.

Module fields can be nested 4 levels deep, and new require_head tag

Live: August 12, 2020

You are now able to create modules that have fields that have 4 levels of depth. This is an increase from the previous 3 levels. Developers can now provide content creators easier interfaces by using more nested field groups. We're also adding a new...

New CLI features - HubDB, file manager fetch, and webpack serverless

Live: July 16, 2020

The CMS CLI (Command Line Interface) is getting several new features in version 1.1.9. Interact with HubDB, fetch from the file manager, and create webpack-serverless. Use npm install -g @hubspot/cms-cli@latest to update to the latest version.

Theme Field Validation

Live: July 27, 2020

At CMS Hub launch we announced themes. We are rolling out validation for the theme fields.json to help theme developers. Errors in the file will be publish blocking, preventing you from adding invalid code that won't work. This is rolling out in two...

Creation of themes, serverless functions, and access to default themes and modules in the Design Manager

Live: July 8, 2020

The launch of CMS Hub introduced serverless functions, themes, and HubSpot default themes. Creating serverless functions and themes previously required using the CMS CLI. You can now do this through the Design Manager. Please note: serverless...

Drag and drop area styles moved from footer to header

Announced: June 24, 2020

Drag and drop areas produce styles from attributes in the template and page-editor. These styles are output in the standard_footer_includes. Those styles are moving to the standard_header_includes.

The CMS CLI is replacing FTP

Announced: April 29, 2020

FTP is an aging technology from the 1970s that relies on FTP clients we didn't build. To deliver the best developer experience we can, it doesn't make sense to continue investing resources in the maintenance of an experience that you’re not...

CMS Hub Developer Features and Updates

Announced: April 14, 2020

What's happening? The launch of CMS Hub includes several important updates for developers. Nothing needs to be done to existing sites to preserve existing functionality. The changes we're announcing make the HubSpot CMS more powerful for developers...

Google Analytics and the HubSpot cookie banner

Announced: December 12, 2019

What’s happened? On November 1, 2019, we made a change to the Google Analytics integration that will prevent the Google Analytics tracking script from firing until a visitor opts in to cookie tracking via the HubSpot cookie banner.

Sunset: Workflow field for custom modules

Announced: December 5, 2019

The field for allowing users to select a workflow in custom modules is being deprecated on December 5th. You won’t be able to create a workflow field when creating new modules in the design manager UI, CMS-CLI, or FTP.

Breaking Change for v3 Lists API Beta

Live: April 28, 2025

The v3 Lists API beta currently accepts both integers and strings for the ID of public folders used for list segmentation and returns the ID as an integer. We will be updating the IDs to use only strings in order to conform to the HubSpot...

Breaking Change: Enhanced Validations for Non-String Properties in HubSpot's CRMObject APIs

Live: November 10, 2025

Starting November 10th, 2025, HubSpot will implement enhanced validations for non-string property values, including enumeration and multi-value enumeration property values submitted via the CRMObject APIs. This change aims to improve data integrity...

Final Reminder: Sunset of v2 Owners API

Live: March 24, 2025

The v2 Owners API will officially be sunset on March 24th, 2025, with no further extensions. After this date, all v2 Owners API endpoints will be fully sunset and return a 404 error response. This marks the final stage of our transition to the more...

Upcoming Sunset: Growth default theme for the HubSpot CMS

Live: March 15, 2025

Note: This post has been updated to reflect an updated sunset date of March 28. The original date for this was March 15. What’s changing Starting on March 28, 2025, the default CMS Growth theme will no longer be available for new HubSpot portals....

Reminder: Breaking Change for Enhanced Validations for Non-String Properties in HubSpot's CRMObject APIs

Live: November 10, 2025

Starting November 10, 2025, HubSpot will introduce enhanced validation rules for non-string property values, including enumeration and multi-value enumeration submitted via the CRMObject APIs. This change aims to improve data integrity and user...

Breaking Change: Large Export Partitioning and Association Limits for the CRM Export API

Live: April 28, 2025

On April 28th, 2025, we will be updating the CRM Exports API to bring it closer to feature parity with the in-app export tool as well as improve the overall performance of the API allowing for quicker file delivery. Exports that exceed one million...

Breaking Change for DateTime Properties in Marketing Emails

Live: April 16, 2025

Starting April 16th, 2025, any DateTime properties in your HubSpot CRM used as personalization tokens in Marketing Emails will now include both the date and time stored in the property rather than just the date.

Breaking Change: Removed Support for Referencing Custom Object Types by Base Name

Live: April 29, 2025

We are removing the undocumented support for requesting custom object types by their base name (GET/crm/v3/objects/{baseName}) in HubSpot public APIs. All custom object types must be referenced by their unique identifier (object type ID, fully...

Public Beta: Automatic Deactivation of Exposed Tokens

Live: April 7, 2025

To enhance the security of our platform and protect our customers, we are introducing an automatic token deactivation public beta feature on October 8th, 2024, for any HubSpot tokens publicly exposed in GitHub repositories. This update is designed...

Reminder: Upcoming Sunset of v2 Owners API on August 30, 2024

Live: March 24, 2025

In February 2024, we announced the sunset of the v2 Owners API. This is a reminder that on August 30, 2024, we will be sunsetting v2 of the Owners API. To avoid disruptions, we strongly encourage users to migrate to v3 of the Owners API before this...

Update: Legacy CTA Sunset

Live: March 31, 2025

Based on community feedback, we have updated our approach to transitioning from Legacy CTAs to the new CTA editor in HubSpot. In Q1 2025, new CTAs cannot be created by the Legacy CTA editor. Below are more details explaining the plan and changes to...

Upcoming Sunset: V1 Contact Lists API

Live: May 30, 2025

What’s changing? The V1 Contact Lists API will sunset on May 30th, 2025. After this date, calls made to the v1 endpoints will no longer function. We're sunsetting the V1 Contact Lists API to focus our development efforts on the improved V3 Lists...