HubSpot Developer Changelog

Additional rate limit protection being added to Form Submissions API

Live: August 8, 2023

We're adding additional rate limit protection to our Forms Submissions APIs. This new rate limit would only apply after the current standard rate limits are reached.

May 2023 Rollup

Announced: May 30, 2023

May 2023 updates bring updated filtering for blog HubL functions, conditional fields in CMS modules, a new WhatsApp module, updated srcset generation, an updated version of our Calling Extensions SDK, support for custom objects in the new Goals API,...

Changes to fields in the Workflows API

Live: August 10, 2023

We're making some changes to some of the fields used in the Workflows API. Certain optional fields will no longer be included in the response for any workflow and other fields will have static, empty values regardless of how the fields may be set...

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...

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.

Upcoming - Increased validation for contact updates made through APIs

Live: May 22, 2023

Beginning on May 22nd, 2023, we will be updating our APIs to use more strict validation for updates made to contact records.

Bugfix: Update to the Custom Behavioral Events API for unknown event names

Live: January 23, 2023

We're making an update to the Custom Behavioral Events API. Currently, the send event endpoint (POST /events/v3/send) will accept an event with an unknown eventName, but will return an HTTP 204 response. Event data is processed asynchronously, which...

December 2022 rollup

Announced: December 16, 2022

December 2022 updates include new features and APIs for the HubSpot CMS, new activity types for the Engagements API, and a new version of the HubSpot CLI tools.

Bugfix: Update for requests to the Web Analytics API with missing scope

Live: January 4, 2023

Currently, requests to the Web Analytics API that do not have the correct scope return an HTTP 200 response with an empty response body, instead of returning an error. This can result in confusion that data doesn't exist when the actual issue is...

Upcoming: Changes to the Marketing Events API

Live: April 30, 2023

We're releasing some new features for marketing events. These new features include the ability to create contacts from the events, as well as tracking registration and detailed attendance for the events.

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

Additional rate limit protection being added to Form Submissions API

May 2023 Rollup

Changes to fields in the Workflows API

Upcoming Sunset: Calendar API

Validation changes to company property - Industry

Upcoming - Increased validation for contact updates made through APIs

Bugfix: Update to the Custom Behavioral Events API for unknown event names

December 2022 rollup

Bugfix: Update for requests to the Web Analytics API with missing scope

Upcoming: Changes to the Marketing Events API

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