There's a new version of the HubSpot API

As of November 30, 2022, HubSpot API keys are no longer a supported authentication method for accessing HubSpot APIs. Instead, you should use a private app access token or OAuth to authenticate API calls. Learn more about this change and how to migrate an API key integration to use a private app instead.

HubSpot Developers FAQ

Below is a list of general frequently asked questions posed by developers working with HubSpot's API. For additional API related questions, please search for answers or ask questions on the developer forum. For COS design resources, check out

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