CRM, marketing, sales, and service platform. Developer-facing API and platform changes.
HubSpot is ending support for v1-v3 APIs, legacy public apps, and legacy private apps effective September 2027. Customers and partners have a 12-month window from the announcement to migrate to supported alternatives.
HubSpot's Fall 2026 release introduces new features on Developer Platform 2026.09, including updated APIs, new beta APIs, and AI builder tools. This changelog covers non-breaking updates; see the separate breaking changes article for legacy API deprecations.
Introduces webhook data sources for Data Studio, preserves active workflow enrollments during record merges, and adds app object support to association workflow actions. These updates reduce custom integration work and improve automation reliability.
HubSpot is permanently removing the ability to create new legacy private apps through the account UI. Users should migrate to Service Keys available in Developer Platform Projects 2026.09 or later for system-to-system integrations; existing legacy private apps remain unaffected.
HubSpot will sunset the Pipelines API V1 on December 4, 2026. Integrations using V1 endpoints must migrate to version 2026-03 or newer before the deadline to maintain functionality.
Node 18.x and 20.x are being deprecated as supported runtimes for Chatflows custom code snippets. Users must upgrade to Node 24.x by August 31st, 2026, or lose the ability to edit their snippets.
Starting with the 2026-09 API version, HubSpot will enforce admin-configured validation rules on all CRM API write paths. Integrations that create or update CRM records must ensure compliance before updating to this API version.
July brings increased owner property limits, larger webhook batch sizes, a new historical API usage chart, and public betas for Contract Imports and the Payment Links API.
Starting with API version 2026-09, the Pipelines API will validate that pipelines and stages are not in use before allowing deletion, blocking delete requests that would leave dangling references. Integrations can bypass this by passing validateReferencesBeforeDelete=false.
June brings new CRM and customer success signals, improved subscription-status histories, expanded Knowledge Vault support for structured data, app object activity association controls, quote module customization, CLI improvements, custom event timeline configuration, and Remote MCP server capabilities for content analytics and landing page creation.
HubSpot Agent CLI is a new command-line interface designed for AI agents to interact with HubSpot CRM data, enabling reading records, running searches, creating and updating objects, and managing pipelines, properties, associations, and workflows. It's purpose-built for agentic environments and automated tasks that run without human intervention.
HubSpot SDKs have been updated to support date-based API versioning using the new /YYYY-MM/ format. Generated from a centralized API specification, SDKs now cover more endpoints across multiple languages and release faster, keeping client libraries aligned with the underlying APIs.
HubSpot released monthly updates including enhancements to Breeze Assistant, a new useCrmSearch hook for UI extensions, stage calculated properties for custom objects, and improvements to HubSpot CLI, blog author attribution, and IP range webhooks.
HubSpot v4 APIs will move to an unsupported state on March 30, 2027, and will no longer receive updates, bug fixes, or stability guarantees after that date.
HubSpot is deprecating the legacy v1 OAuth API in favor of a new date-based, versioned OAuth API for token issuance and introspection. The v1 API will be fully deprecated on February 16th, 2027, and a new REVOKE endpoint is being introduced in the latest OAuth API version.
HubSpot updated requirements for listed and certified apps in the Marketplace to align with current platform standards and deprecations, ensuring app compatibility and providing customers with a more reliable and secure experience.
HubSpot shared its vision for an open ecosystem in the agent era and updated Developer Terms and Technology Partner Program Agreement to reflect how developers, customers, and agents are building on the platform today.
Monthly release rollup featuring updates from Spring Spotlight 2026, including availability of the legacy CRM card migration tool and new features for the Custom Channels API.
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 instead.
The hs_customer_agent_lead_status contact property is becoming system-managed and read-only, storing only Customer Agent-generated lead qualification status on contact records.
HubSpot announced the general availability of date-based versioned APIs and Developer Platform version 2026.03, establishing a more stable release cadence with two major releases per year in March and September, plus an 18-month support cycle for better release planning.
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