HubSpot Developer Changelog (13)

Updated recommendations for storing OAuth access tokens

Announced: December 15, 2023

We're updating our recommendation for storing access tokens to allow tokens to be at least 512 characters in length.

Update to Forms API v3 and the lifecycle stage

Announced: December 12, 2023

This post serves as an update to the previous post on the lifecycle stage in forms. This post covers the details for the Forms API v3, which were missing from the previous post.

Log tracing for UI extensions

Announced: December 11, 2023

Developers building UI Extensions with private apps will now be able to connect front-end and back-end logs with a single trace ID. You can trace and visualize both events in the front-end React layer (e.g. card rendering, button clicks, data entry)...

Increasing the size of contact record IDs

Announced: December 7, 2023

Beginning in March 2024, we'll be updating the system that generates contact record IDs. This will affect the id for the v3 Contacts API, the vid for the legacy Contacts API, and the hs_object_id property returned with either API.

Local Module Development: “host_template_types” property is being replaced with “content_types”

Announced: December 4, 2023

What’s Changing and why? The host_template_types array property for modules is being replaced with the content_types array property. The new content_types property is more robust and will allow for greater specificity regarding where modules can be...

November 2023 Rollup

Announced: November 30, 2023

Developer Updates for November 2023 Raised limits for programmable emails We've increased limits by 5X. Now when you use CRM functions (crm_associations, crm_object, crm_objects) in these type of emails, you'll be able to send them with the...

Developer Projects Platform Version 2023.2

Live: November 21, 2023

If you're using HubSpot Developer Projects - currently used for building UI Extensions and for the CMS React Beta we're introducing a new project version. To get the updates you'll need to update the platform version in your project config file.

Updates to the New Lists API Beta

Live: September 21, 2023

What’s Changing? As mentioned in the original changelog post, the Lists beta was separated into two phases. As of November 20th, 2023, release 2 has been made available for you to explore. With this release, developers are now able to create and...

New Recordings & Transcripts API replaces hs_call_recording_url for call engagements

Live: September 30, 2024

We're releasing a new Recordings & Transcripts API for securely sending call recordings to HubSpot using an authenticated URL. The new API replaces the hs_call_recording_url property for call engagements.

Enhanced Handling of Semicolon-Delimited Property Values

Announced: November 8, 2023

Edit: In response to some customer feedback, we’ll be looking at enabling this feature via a setting instead of opting everybody into this by default and are removing the February 6, 2024 deadline and replacing with 1st half of 2024. What’s...

Additional details returned when generating OAuth access tokens

Live: August 18, 2025

What's changing? We're adding two additional fields to the response when generating an access token using the POST /oauth/v1/token endpoint:

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

Updated recommendations for storing OAuth access tokens

Update to Forms API v3 and the lifecycle stage

Log tracing for UI extensions

Increasing the size of contact record IDs

Local Module Development: “host_template_types” property is being replaced with “content_types”

November 2023 Rollup

Developer Projects Platform Version 2023.2

Updates to the New Lists API Beta

New Recordings & Transcripts API replaces hs_call_recording_url for call engagements

Enhanced Handling of Semicolon-Delimited Property Values

Additional details returned when generating OAuth access tokens

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