Developer Changelog

Updated SDKs for Date-based Versioning

Brooke Bond — Wed, 10 Jun 2026 17:22:49 GMT

We’ve improved our SDK releases to support date-based API versioning, the new /YYYY-MM/ format introduced across HubSpot’s APIs. Generated from a centrally managed API specification, SDKs now cover more endpoints across multiple languages and release faster, so your clients stay aligned with the APIs you're building on.

May 2026 Rollup

aswebster@hubspot.com (Ashley Webster) — Thu, 28 May 2026 16:26:35 GMT

This month brings a set of updates aimed at making everyday building better. Breeze Assistant steps further into your workflows, a new useCrmSearch hook shipped for UI extensions, stage calculated properties available for custom objects and the HubSpot CLI got a fresh round of improvements — plus updates to blog author attribution, IP range webhooks, and more. Read on below for the details.

Deprecating Support for HubSpot v4 APIs

hseligson@hubspot.com (Hannah Seligson) — Thu, 21 May 2026 12:58:11 GMT

On March 30, 2027, HubSpot v4 APIs will move to an unsupported state. After that date, v4 APIs will no longer receive updates, bug fixes, or stability guarantees from HubSpot.

v1 OAuth API Deprecation

hseligson@hubspot.com (Hannah Seligson) — Tue, 12 May 2026 12:57:44 GMT

We have introduced the latest date-based, versioned OAuth API for token issuance and introspection, as announced previously here. As adoption of the new OAuth API grows, we are beginning to deprecate the legacy v1 OAuth API. As part of this transition, a new REVOKE endpoint is also being introduced for the latest date-based versioned OAuth API, and the v1 API will be fully deprecated on February 16th, 2027.

App Listing and App Certification Requirement Updates for May 2026

dadams@hubspot.com (David Adams) — Thu, 07 May 2026 13:21:05 GMT

We're updating the requirements for listed and certified apps in the HubSpot Marketplace to align with current platform standards and deprecations. These updates ensure that apps stay compatible with HubSpot's evolving platform and APIs, providing customers with a more reliable, secure experience.

Our Ecosystem Vision for the Agent Era & Updated Developer Terms

criley@hubspot.com (Chris Riley) — Mon, 04 May 2026 14:10:01 GMT

What’s changing?

We’ve recently shared our vision for building an open ecosystem for the agent era here.

To reflect how developers, customers, and agents are actually building on HubSpot today, we’ve also updated our Developer Terms and Technology Partner Program Agreement. Including:

April 2026 Rollup

Brooke Bond — Thu, 30 Apr 2026 18:07:36 GMT

This month, on top of all the of the amazing updates and releases from Spring Spotlight 2026, we also have updates regarding the availability of our legacy CRM card migration tool, new features for the Custom Channels API, and more. Make sure to read on below for more details.

Legacy Public App Creation Sunset

hseligson@hubspot.com (Hannah Seligson) — Thu, 23 Apr 2026 13:12:02 GMT

Beginning May 26, 2026, the ability to create new legacy public apps via the Developer Platform UI will be permanently disabled. New public app development should use the Projects-based app platform.

Upcoming breaking change: Customer Agent Lead Status contact property becoming read-only

aswebster@hubspot.com (Ashley Webster) — Wed, 15 Apr 2026 15:10:36 GMT

We’re making the Customer Agent Lead Status contact property hs_customer_agent_lead_status system‑managed and read‑only. This property stores Customer Agent system-generated lead qualification status on contact records (e.g., whether a contact was qualified, partially qualified or not qualified).

Spring 2026 Spotlight

hs-devrel-advocates@hubspot.com (HubSpot Developer Relations Team) — Tue, 14 Apr 2026 12:45:01 GMT

Welcome to the Spring Spotlight special edition of the developer changelog. We've got a lot of exciting updates to go over, including the general availability of date-based versioned APIs and Developer Platform version 2026.03. With these date-based updates comes a more stable release cadence. Both the APIs and Developer Platform project versions will have two major releases a year, in March and September. Additionally, to help you better prepare for these updates, we are also introducing an 18-month support cycle. Learn more about how date-based releases affect the Developer Platform on our developer documentation.