HubSpot Developer Changelog (17)

Asset Marketplace April Rollup - Theme updates required by July 12th, 2023

Announced: April 26, 2023

Modules will be released onto the asset marketplace soon. To prepare, we want to make sure your themes are the best they can be. Read on to review required theme updates, and complete these updates by July 12th, 2023.

Upcoming: Property Validations Rules will be enforced for APIs and Integrations

Live: July 24, 2023

Property Validations allow admins to prevent data quality issues before they start. By setting up property validation rules, admins can control what data can be entered into their system ensuring the entry of clean, reliable, and accurate data.

Upcoming Sunset: Calendar API

Live: July 28, 2023

Note: This post has been updated to reflect an updated sunset date of August 31. The original date for this was July 28. We are sunsetting the Calendar API. Beginning on August 31, the API will no longer function, and data from the marketing...

Amendment to Forms API Submission Validation

Announced: April 17, 2023

Whats Changing? Last year (February 2022), we announced some updates to our form submissions API that would make our customer’s accounts more secure, by requiring all fields be declared on the form definition before we would accept these fields in...

Validation changes to company property - Industry

Live: July 14, 2023

Beginning on July 14th, the industry property on company records will begin correctly validating values when company records are created and updated.

Bug fix: Contact Properties updated to indicate they do not force uniqueness

Live: April 12, 2023

We discovered that it was possible using the API to include hasUniqueValue=true in a Contact property's definition. Currently HubSpot doesn't support unique properties in Contacts. So despite the value showing as true, it was ignored and not...

March 2023 Rollup

Announced: March 29, 2023

March 2023 developer updates include theme-level module updates, SEO filter recommendations, new HubL variables, deprecation of the Gallery Default Module, sandboxes with unlimited resyncs of CRM object definitions, module and theme URL fields...

Deprecating previousCategories in the Cookie Banner API

Live: April 3, 2023

We've discovered that in some situations the previousCategories field within the cookie banner's consent object has incorrect values. The Cookie Banner API provides consent listeners so that developers can properly handle cookies based on the user's...

Changes to Actors and Delivery Identifiers in the Conversations API

Live: April 10, 2023

The Conversations API (currently in beta) is used to read and send HubSpot conversations inbox messages. We're making 2 changes to the message recipient portion of the API response, and one of the changes may require you to make changes if your...

February 2023 Rollup

Announced: February 28, 2023

February 2023 updates include new API endpoints for Goals, Snowflake updates, Multi-Currencies for app listings, and a performance update for the Script Loader.

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

Asset Marketplace April Rollup - Theme updates required by July 12th, 2023

Upcoming: Property Validations Rules will be enforced for APIs and Integrations

Upcoming Sunset: Calendar API

Amendment to Forms API Submission Validation

Validation changes to company property - Industry

Bug fix: Contact Properties updated to indicate they do not force uniqueness

March 2023 Rollup

Deprecating previousCategories in the Cookie Banner API

Changes to Actors and Delivery Identifiers in the Conversations API

February 2023 Rollup

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