There's a new version of the HubSpot API
As of November 30, 2022, HubSpot API Keys are being deprecated and are no longer supported. Continued use of HubSpot API Keys is a security risk to your account and data. Your API Keys could be deactivated at any time after Nov. 30th, and we recommend that you migrate to Private Apps as soon as possible so you do not lose business-critical functionality.
Updates to HubSpot's APIs and developer tools are made through our Developer Changelog.
You can use the form on the left to subscribe to updates. Select Instant for the frequency to get notifications as soon as they are announced. Otherwise, select one of the other frequencies to get a digest of updates at your chosen frequency.
Updates are also cross posted to our developer forums, under the Announcement tag.