megachangelog
Announcement2026.07

July 2026 Rollup: New APIs, increased limits, and historical usage chart

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.

This month's updates include a raised owner property limit, larger Webhooks Journal batch sizes, and a new historical API usage chart — plus public betas for Contract Imports and the Payment Links API. Read on for the details.

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Source: original entry ↗

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Security

HubSpot-hosted domains moving to TLS 1.2 minimum

HubSpot will automatically update the minimum TLS version for HubSpot-hosted domains from TLS 1.0 or 1.1 to TLS 1.2 on October 14th, enhancing security for all hosted domains.

securitytlsdomainsencryption
BreakingFall 2026

End of Support for v1-v3 APIs and Legacy Apps

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.

apideprecationbreaking-changemigration
Announcement2026.09

Fall 2026 Spotlight - Developer and Builder Updates

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.

apideveloper-platformai-builderbeta
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