HubSpot Developer Changelog

Bugfix: Update for Webhook Association Events Containing Internal CRM Objects

Announced: April 23, 2025

We've updated our Webhooks execution flow to enhance security by ensuring that association events containing non-public CRM objects are no longer sent to external integrators. This change shouldn’t require immediate action from customers, but it may...

New Global Configuration

Announced: April 15, 2025

We are introducing a new global configuration system to streamline account management for developers using the HubSpot CLI v7.4.0. This change addresses issues related to using multiple account configuration files, often leading to conflicts and...

Custom Channels API Is Now Live

Announced: April 10, 2025

We are excited to announce important updates to the Custom Channels API to enhance flexibility, functionality, and integration capabilities now that it's live. The updates prioritize improvements in webhook functionality, message threading, channel...

March 2025 Rollup

Announced: March 31, 2025

HubSpot's March 2025 update introduces significant developer updates. Providers can now create marketplace listings in any language to enhance global reach, and Custom Workflow Actions now support 14 languages. The Calling Extensions SDK includes...

New Size Limits for App Events and App Event Properties

Announced: March 18, 2025

We have revised the size restrictions for App Events, also referred to as Timeline Events or Integration Events, to ensure seamless integration within the UnifiedEvents ecosystem.

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...

Marketing Email API: v3 released to general availability and upcoming sunset for v1

Live: October 1, 2025

Today we're announcing changes for the two versions of the Marketing Emails API.

Update for Legacy CTA Editor Sunset

Live: November 30, 2025

We have an essential update on the scope and timeline of a previously announced Legacy CTA sunset. Starting September 1st, 2025, all new CTAs must be created using the new CTA editor. Existing Legacy CTAs that have already been created will continue...

Upcoming Sunset of Clearbit’s Free Logo API

Live: December 1, 2025

In December 2023, Clearbit was acquired by HubSpot, marking the beginning of an exciting new chapter for both companies. Since then, the Clearbit team has fully integrated into HubSpot, combining our expertise with HubSpot’s resources to better...

Upcoming Sunset: HubSpot Academy CMS for Developers Certification

Live: May 30, 2025

What’s changing Starting on May 30, 2025, the HubSpot CMS for Developers Certification will no longer be available. The content of this course has been updated over the years but has hit a point that significant revisions are needed to to keep up...

Breaking Change: HubL Function Limits for Marketing Emails

Live: May 28, 2025

Beginning on May 28, 2025, we are enforcing the CMS HubL function limits for all customers using the following functions in their Marketing Emails, per our Software Products, Packaging, and Limits policies.

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...

Upcoming Sunset: Growth default theme for the HubSpot CMS

Live: May 14, 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 May 14, 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...

Update: Legacy CTA Sunset

Live: November 30, 2025

Attention: We've recently revised our timeline on March 25th, 2025. For the most current details regarding this change, please check the latest updates in our changelog. Based on community feedback, we have updated our approach to transitioning from...

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...

Legacy CTA Sunset Timeline and Scope Update

Live: November 30, 2025

Attention: We've recently revised our timeline on March 25th, 2025. For the most current details regarding this change, please check the latest updates in our changelog.

Upcoming Sunset: Legacy CTAs

Live: November 30, 2025

Attention: We've recently revised our timeline on March 25th, 2025. For the most current details regarding this change, please check the latest updates in our changelog. We are sunsetting the Legacy CTAs (Call-To-Action) app and migrating it into a...

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Latest Posts

Bugfix: Update for Webhook Association Events Containing Internal CRM Objects

New Global Configuration

Custom Channels API Is Now Live

March 2025 Rollup

New Size Limits for App Events and App Event Properties

Final Reminder: Sunset of v2 Owners API

Marketing Email API: v3 released to general availability and upcoming sunset for v1

Update for Legacy CTA Editor Sunset

Upcoming Sunset of Clearbit’s Free Logo API

Upcoming Sunset: HubSpot Academy CMS for Developers Certification

Breaking Change: HubL Function Limits for Marketing Emails

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

Upcoming Sunset: Growth default theme for the HubSpot CMS

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

Update: Legacy CTA Sunset

Upcoming Sunset: V1 Contact Lists API

Legacy CTA Sunset Timeline and Scope Update

Upcoming Sunset: Legacy CTAs