We check HubSpot's developer changelog every day, because we run production integrations on the HubSpot API. This page lists the 42 changes we have recorded since monitoring started on 26 March 2026, newest first.
8 breaking changes and 2 deprecations in the HubSpot API in the last 90 days. The latest: “Legacy APIs and Apps” (15 September 2026).
Labels are assigned automatically. Check the vendor's note before planning work around an entry.
General availability of developer and builder updates in Fall Spotlight 2026 release on Developer Platform version 2026.09.
What's Going Unsupported and When: HubSpot announced end of support for v1-v3 APIs, legacy public apps, and legacy private apps with September 2027 enforcement date.
Affects one of your integrations? We take over the migration, at a fixed pricePipeline and Pipeline Stage Delete Endpoints Validation by Default in 2026-09: Pipeline and pipeline stage delete endpoints will validate references by default starting with the 2026-09 API version, potentially breaking integrations that delete pipelines with existing references.
Affects one of your integrations? We take over the migration, at a fixed pricePipeline and pipeline stage delete endpoints will validate references by default starting with the 2026-09 API version: Pipeline and pipeline stage delete endpoints will validate references by default in 2026-09 API version, potentially preventing deletion of referenced objects.
Affects one of your integrations? We take over the migration, at a fixed priceHubSpot is permanently removing the ability to create new legacy private apps through the account UI, requiring users to migrate to Service Keys via Developer Platform Projects.
December 4, 2026: Pipelines API V1 will be sunset on December 4, 2026, requiring integrations to migrate to 2026-03 or later API versions.
Node 18.x and 20.x runtimes are being deprecated as supported versions for Chatflows custom code snippets; users must upgrade to newer Node versions.
CRM API Write Validation Enforcement Starting with the 2026-09 API Version: Starting with the /2026-09/ API version on September 8, 2026, HubSpot will enforce admin-configured validation rules on all CRM API write paths; integrations creating or updating CRM records must handle validation errors.
CRM API Write Validation Enforcement Starting with the 2026-09 API Version: Starting September 8, 2026, HubSpot will enforce admin-configured validation rules on all CRM API write paths, requiring integrations to handle new validation errors.
Monthly rollup of API and platform updates from August 2026.
Monthly updates including raised owner property limit, larger Webhooks Journal batch sizes, new API usage chart, and public betas for Contract Imports and Payment Links API.
Raised owner property limit, expanded Webhooks Journal batch sizes, and added historical API usage chart with public betas for Contract Imports and Payment Links API.
Payment Links API has been released in public beta, enabling new payment processing capabilities.
Pipeline and pipeline stage delete endpoints will validate references by default starting with the 2026-09 API version: Pipeline and pipeline stage delete endpoints will validate references by default in the 2026-09 API version, potentially breaking integrations that delete pipelines with existing references.
Customer Agent Lead Status contact property becoming read-only: The hs_customer_agent_lead_status contact property will become read-only, requiring updates to integrations that write to this field.
Monthly rollup of developer platform updates from June 2026.
New command-line interface for AI agents to interact with HubSpot CRM data, now available in public beta.
SDKs updated to support date-based API versioning with new /YYYY-MM/ format, generated from centrally managed API specification.
Monthly updates including Breeze Assistant workflow enhancements and other platform improvements.
Beginning May 26, 2026, the ability to create new legacy public apps will be discontinued.
HubSpot will resume automatic migration from legacy Cookie Consent Banner v1 to v2 starting May 11, 2026, requiring developers to ensure v2 compatibility.
Updated requirements for listed and certified apps in HubSpot Marketplace to align with current platform standards and deprecations.
Updates to developer terms and ecosystem vision for the agent era, reflecting HubSpot's strategic direction.
Monthly updates including legacy CRM card migration tool availability and other platform improvements.
Major announcement of date-based versioned APIs general availability and Developer Platform version 2026.03, representing significant API infrastructure changes.
Major updates including general availability of date-based versioned APIs and Developer Platform version 2026.03.
Remote HubSpot MCP server graduates from beta to GA with new write capabilities, Activity history, marketing content objects, and organizational context support.
HubSpot will migrate content rendering from legacy JRE locale dataset to CLDR standard; most content unchanged but some localization behavior may differ.
New API versioning system using /YYYY-MM/ format (e.g., /2026-03/) instead of v1, v2, v3, v4 to denote the month APIs were shipped.
Monthly updates including ability to view app objects in Data Model Builder and faster video-based app review process.
Added confirmation dialog when HubSpot users install third-party apps that haven't been reviewed by HubSpot.
All legacy developer accounts being upgraded to unified Developer Platform, consolidating separate tools into single HubSpot account.
Monthly updates including enhanced OAuth install logging, Custom Events for Pro customers, and deeper CRM associations and UI improvements.
Monthly updates including enhanced OAuth install logging, Custom Events for Pro customers, deeper CRM associations, and UI improvements.
Update CRM Records & Access more Objects and Engagements: HubSpot ChatGPT connector now supports creating and updating CRM records and logging activities directly from ChatGPT.
Update CRM Records & Access more Objects and Engagements: HubSpot ChatGPT connector now supports creating/updating CRM records and logging activities directly from ChatGPT.
Local HubSpot Developer MCP Server is now generally available for creating apps and CMS assets through agentic tools.
HubSpot will automatically migrate accounts from legacy Cookie Consent Banner v1 to v2 starting May 11, 2026, requiring integration updates.
Monthly developer updates announced for January 2026.
New OAuth v3 API endpoints released with enhanced security and compliance standards, requiring authentication method updates for existing integrations.
Major CLI release with breaking changes including new minimum Node.js version (Node 20), removal of deprecated commands and legacy behaviors, and dropped support for older project versions.
Self-Service MCP Auth Apps for the HubSpot Remote MCP Server: Partners and customers can now build and manage their own AI connectors to the HubSpot Remote MCP Server through a self-service interface.
We watch HubSpot because we run integrations on it. If one of yours depends on HubSpot, we can take it over: build it properly, operate it, and fix it when HubSpot changes, before your data is affected. Fixed-price scoping quote within 48 hours.