HubSpot Developer Changelog

Deprecation of Node v18 in all serverless functions and CLI

Announced: April 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...

CDN path for static assets (CSS & JavaScript) changing

Live: February 12, 2025

We're updating the paths for design manager assets, including CSS and JS files. The paths will change from hs-fs/hub/* to hs-fs/hubfs/*.

CRM Imports API - New validation for Required Properties

Live: January 20, 2025

CRM objects often have properties that are required for creating records of that object type. For example Deals, require a Deal Name. When using the CRM Imports API, we're going to start validating that the provided import Request contains the...

Sandboxes and CLI sandbox commands

Live: September 10, 2024

To prepare foundational work needed to deliver reliable and scalable upcoming sandbox features, we're making changes to the CLI's standard sandboxes and development sandboxes creation and sync experience in the CLI (Command Line Interface) and UI...

August 2024 Rollup

Announced: August 29, 2024

It's the last rollup before INBOUND! This month we have CLI updates, new contact properties, UI Extension beta updates, and email subscription API updates. HubSpot CLI v5.4

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...

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,...

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....

Deprecation of Node v16 in all serverless functions

Announced: April 12, 2024

Node.js v16 reached end of life on September 11th, 2023. To make sure HubSpot systems stay up to date on security and reliability, we will be ending support for Node.js v16 on July 12, 2024. After this date, any existing functions using v16 will...

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 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...

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: 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...

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

Deprecation of Node v18 in all serverless functions and CLI

CDN path for static assets (CSS & JavaScript) changing

CRM Imports API - New validation for Required Properties

Sandboxes and CLI sandbox commands

August 2024 Rollup

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

CLI now requires Node v18 or higher

Changes to HubL Time Filters - Handling Null Values

Long-standing HubL Limits will now be properly enforced

Deprecation of Node v16 in all serverless functions

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 for v3 Lists API Beta

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

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

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

Update: Legacy CTA Sunset

Upcoming Sunset: V1 Contact Lists API

Legacy CTA Sunset Timeline and Scope Update

Upcoming Sunset: Legacy CTAs