This month’s updates focus on enhancing developer workflows and platform security, featuring a new IP Ranges API for firewall management and the general availability of the App Uninstallation API. We’ve also introduced several quality-of-life improvements, including a Legacy CRM Card Converter to assist in your migration to modern App Cards, setting a custom template for CPQ quotes, actionable migration insights directly within your HubSpot Account, and expanded Breeze Assistant capabilities for custom website and app event data. Finally, wer'e making significant updates to the standard sandbox experience that bring predictable record limits and new deployment capabilities.
New Resource: Legacy CRM Card Converter
To support developers migrating from Classic CRM Cards to the new App Cards, we’ve released the Legacy CRM Card Converter, a lightweight tool and example designed to simplify the transition process. The resource provides:
- Sample mappings that demonstrate how Classic CRM Card patterns translate to modern App Cards.
- Reference implementation to help you quickly understand equivalent React-based structures.
- Guidance and best practices for updating legacy cards to transition to new UI Extension capabilities.
The card converter is intended to accelerate planning and development as you prepare for the October 31st, 2026, sunset of Classic CRM Cards. Explore the tool here: https://github.com/HubSpot/ui-extensions-examples/tree/main/legacy-card-converter
Developer Tasks and App Migration Paths
Now the Developer Platform surfaces actionable insights directly on the Developer Overview for all HubSpot Accounts. Developers can view task cards highlighting whether any of their apps are eligible for migration to the new Developer Platform, with clear guidance on which apps can and cannot be migrated.
Task Cards: A task card lists action items for developers, focusing on highlighting eligible apps for migration. A task card can be found on the Developer Overview page within the HubSpot Account.
Migration Eligibility Labels: Each app is now labeled as ‘Yes’ (can be migrated) or ‘No’ (should not be migrated). When migration steps are available, developers will be directed to the Legacy Apps page within your HubSpot Account.
Previously, the Developer Overview lacked actionable next steps, leaving users uncertain how to maintain or upgrade their apps. These new insights enable clear, actionable guidance, reducing mistakes and improving the migration experience. For additional guidance, refer to the Developer Platform documentation on app migration guides.
HubSpot IP Ranges API
You can now dynamically access HubSpot's public IP ranges for your projects and firewalls. With this API, you can automatically update your firewall rules and enhance your security monitoring. You can retrieve the set of IP ranges using this endpoint: https://api.hubapi.com/meta/network-origins/2025-09/ip-ranges
This API does not require authorization. The response will include a list of IP ranges and the HubSpot services using those IPs. See the documentation for full details.
New Filter by Object Type ID for v3 Lists API
The /crm/v3/lists/search endpoint in the v3 Lists API now supports filtering lists by object type using the objectTypeId parameter in the POST request body. See additional details on what specifically changed, below:
New Filter Option: Developers can now include the objectTypeId property in the POST request body when querying the /crm/v3/lists/search API endpoint.
Supported Values: Common values include object type IDs, such as "0-1", or a string, such as "CONTACT".
Request Body Example:
This new feature enhances list segmentation by allowing filtering of lists by HubSpot CRM object type. Applicable to CRM segments (part of Lists), especially for Marketing Hub and Main Hub products. Additionally, this change enables tighter integration for custom reporting and workflow automation with more granular access when programmatically dealing with lists for marketing and CRM operations.
Template Selection for CPQ Quotes via API
You can now specify a custom template when creating CPQ quotes through the Quotes API, rather than relying on the default content template. This unlocks full control over quote design and structure for any workflow that programmatically generates quotes. During creation, the API will associate the quote to the selected template and pull in any additional template data, while still prioritizing values explicitly set on the quote. Note that templates can only be chosen at creation time and cannot be changed after the quote is generated. Learn more in the Quotes API documentation.
Standard Sandbox Updates: New Limits, New Capabilities, and Legacy Sunset
HubSpot is rolling out a more powerful Standard Sandbox experience, alongside clearer data limits and a planned sunset of Legacy Standard Sandboxes. All sandboxes will now enforce a consistent limit of 200,000 records per major CRM object type (including contacts, companies, deals, tickets, custom objects, and more), ensuring predictable performance and stable testing environments. In parallel, a new Standard Sandbox version introduces an enhanced copy of supported production metadata and a Deploy to Production feature for eligible assets, enabling teams to safely test and then natively deploy schema changes, workflows, lists, forms, and automated emails.
To support this upgrade, Legacy Standard Sandboxes will be sunset on March 16, 2026, fully replaced by the new Standard Sandbox. Super Admins can create the new sandbox now, with temporary sandbox limit increases available to ease migration; no action is required until the sunset date, but customers with connected apps or complex automations should plan ahead. Learn more in the Sandbox FAQ and documentation. Read more regarding the sunset on the dedicated changelog post which includes helpful FAQs.
Public API for Uninstalling an app released to GA
The previously announced API for uninstalling an app from a HubSpot Account has been released from beta into general availability. This endpoint allows app builders to remove their app from a HubSpot Account, which removes any app features set up for the app, including removing any configured app cards, as well as unsubscribing any configured webhooks for that account. See the documentation for more details.
Updates to associations to the Cart object
You can now create associations between carts and custom objects, and configure custom association labels and limits for the cart object. This improvement allows you to tailor the cart object to your specific business needs and workflows. This update allows integrations to update associations using the Associations API, as well as allowing super admin users to update associations by editing the data model in their account. Additionally, users can associate carts to deals directly from record pages in HubSpot.
Breeze Assistant can now query your Custom event and App event data
Breeze Assistant can now query the custom website events and app events you've configured in your HubSpot Account. You can now get answers about these events directly from Breeze Assistant, helping you:
- Gain deeper insights into user behavior on your website and through your apps
- Make data-driven decisions based on specific actions your customers are taking
- Streamline your ability to answer important questions about your business using these additional data sources
This enhancement brings you closer to having a comprehensive view of all your HubSpot data through Breeze Assistant. No additional setup is required to enable this functionality. Once you've configured these events in your HubSpot Account, you can ask Breeze Assistant questions about your custom website or app events.
Questions or comments? Please join us in our developer forums.