HubSpot Developer Changelog | Hannah Seligson (5)

New Integration of Custom Events with Custom Objects

Announced: April 4, 2024

Starting April 4th, 2024, we are introducing an update to our Custom Objects API that enables the creation and association of Custom Events with Custom Objects. This enhancement allows developers to capture unique business actions directly within...

Introducing New App Certification Submission Limits

Announced: March 29, 2024

Starting Friday, March 29, 2024, significant changes will be made to the app certification submission process for app partners. Aimed at ensuring equitable access to certification resources and improving the efficiency of the review process, we're...

Public beta: New DealSplits API

Announced: March 20, 2024

We are excited to announce the release of the new DealSplits Public API for HubSpot customers, which will be live starting May 28, 2024. This API lets customers list and create deal splits for batches of deals directly through HubSpot's CRM. The...

SSL Certificate Migration Notice

Announced: March 15, 2024

Recently, HubSpot’s CDN provider announced the deprecation of SSL certificates issued by DigiCert. To ensure continued secure service for HubSpot customers, we transitioned to an alternative SSL certificate provider for api.hubapi.com for HubSpot to...

Upcoming Sunset: v2 Owners API

Live: August 30, 2024

On August 30, 2024, we will be sunsetting the v2 of the Owners API.

Bugfix: Webhook AssociationChanges

Live: May 14, 2024

We are pleased to announce an update to our webhook subscriptions handling associationChanges that significantly improves how events for associations between the same object types are fired.

January 2024 Rollup

Announced: January 30, 2024

The January 2024 monthly rollup within the developer changelog of HubSpot includes several updates. These updates are a new Webhooks Export Log for Non-Project Based Private Apps with Higher Call Volumes, Managing Email Variables for...

Upcoming Sunset: JSON Custom Cards

Live: March 31, 2024

Previously, HubSpot released a beta allowing users to utilize private apps and projects to build a custom card with JSON-based components for UI extensibility within the CRM development tools.

Upcoming Change: Email Verification Required for All Marketing Emails

Live: October 26, 2023

Starting October 26th, 2023, any marketing emails, including those manually sent or sent through automation that use a personalization token to populate the "From" address field, will require email verification. If an email address is not verified,...

Update for CRM Development Tools: React Tech Stack for UI Extensions

Announced: September 8, 2023

Today, HubSpot announces a React-based tech stack for building UI extensions (custom cards) within CRM Developer tools for Developers!

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

New Integration of Custom Events with Custom Objects

Introducing New App Certification Submission Limits

Public beta: New DealSplits API

SSL Certificate Migration Notice

Upcoming Sunset: v2 Owners API

Bugfix: Webhook AssociationChanges

January 2024 Rollup

Upcoming Sunset: JSON Custom Cards

Upcoming Change: Email Verification Required for All Marketing Emails

Update for CRM Development Tools: React Tech Stack for UI Extensions

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