HubSpot Developer Changelog (9)

Updates to Enumeration Properties in Custom Quotes and how to fetch labels and internal values

Announced: July 19, 2024

We are updating the JSON returned for custom enumeration properties to include BOTH the internal value as well as the external label. For CMS Developers, we have updated the crm_property_definition function to be available outside of gated content.

Sites using polyfill.io on HubSpot were rewritten to use Cloudflare's version

Live: July 15, 2024

URLs for a popular polyfill service (polyfill.io) began serving malicious code after years of serving safe polyfill scripts. Web developers use polyfills to add backward compatibility for newer browser APIs. None of HubSpot's default assets use...

Marketing Email API Migration to ILS Lists

Live: July 15, 2024

With the migration process from List IDs to ILS List IDs, the Marketing Email API is being updated to include the ILS List ID in the response and accept ILS IDs in the request. On October 31st, 2024 the contactLists object will no longer function...

June 2024 Rollup

Announced: June 25, 2024

For the month of June, HubSpot's recent updates for developers highlight enhancements for passing data in custom code, custom workflow actions and webhook actions. The UIE Extensions Beta has added new UI Components and introduced a new API update...

CLI now requires Node v18 or higher

Live: September 10, 2024

Version 6 of the HubSpot CLI drops support for Node v16. Node.js v16 reached end of life on September 11th, 2023. To ensure security and reliability for developers building with the CLI, we will be ending support for Node.js v16 on September 10th,...

Defaulting hs_timestamp to Meeting Start Time in Meetings Engagement API

Live: November 12, 2024

In our continuous effort to enhance the usability and accuracy of the Meetings Engagement API, we're introducing a change to handling the hs_timestamp property for MEETING_EVENT objects starting November 12, 2024. This update aims to improve the...

New Beta Version of the Automation API released

Announced: June 10, 2024

Today we're releasing a new version of the Automation API into public beta. This new API includes updated support for all current workflows functionality, and also brings the API up to our modern API design standards.

Changes to HubL Time Filters - Handling Null Values

Live: September 30, 2024

The datetimetformat, between_times, unixtimestamp, format_date, format_datetime and format_time HubL filters and functions now display warnings if they are called with a null argument. Currently, when a null argument is passed to them, the current...

Long-standing HubL Limits will now be properly enforced

Live: November 4, 2024

Starting June 10th, 2024, we will begin to enforce the CMS HubL limits for all net-new HubSpot accounts and accounts not currently exceeding the limits using the affected functions, in accordance with our Software Products, Packaging, and Limits....

Introducing New Participant State API

Announced: June 4, 2024

We are excited to announce today, June 4th, 2024, that we are releasing a new Participant State API and the new Marketing Event Attendance State CRM object. This API is designed to enhance the management and analysis of participant data at marketing...

Ending Support for HubSpot CLI Versions Below 6.0.0

Live: October 1, 2025

We will be officially ending support for all HubSpot CLI versions below 6.0.0. This will improve security, reliability, and compatibility with our developer platform and other developer tooling for our developer community.

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.

Deprecation of Node v18 in all serverless functions and CLI

Live: October 1, 2025

Node.js v18 will reach end of life on April 30th, 2025. To make sure HubSpot systems stay up to date on security and reliability, we will be ending support for Node.js v18 on Oct 1, 2025. After this date, any existing functions using v18 will...

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...

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...

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: September 30, 2025

Edit: we have extended the sunset date from May 30, 2025 to September 30, 2025 to allow more time for migrations. The below has been updated to reflect this change. What’s changing? The V1 Contact Lists API will sunset on September 30, 2025. After...

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

Updates to Enumeration Properties in Custom Quotes and how to fetch labels and internal values

Sites using polyfill.io on HubSpot were rewritten to use Cloudflare's version

Marketing Email API Migration to ILS Lists

June 2024 Rollup

CLI now requires Node v18 or higher

Defaulting hs_timestamp to Meeting Start Time in Meetings Engagement API

New Beta Version of the Automation API released

Changes to HubL Time Filters - Handling Null Values

Long-standing HubL Limits will now be properly enforced

Introducing New Participant State API

Ending Support for HubSpot CLI Versions Below 6.0.0

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

Deprecation of Node v18 in all serverless functions and CLI

Update for Legacy CTA Editor Sunset

Upcoming Sunset of Clearbit’s Free Logo API

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

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