The HubSpot public endpoints are powered by the same underlying technology that powers the core HubSpot application. As a result, HubSpot engineering closely monitors usage of the public APIs to ensure a quality experience for users of the HubSpot application.
Below, you'll find the limits by which a single integration (as identified by an access token) can consume the HubSpot public APIs. If you have any questions, please post them in the developer forum.
429response code. Please see this page for more details about those errors, and suggestions on working with the request limits.
expires_inparamter whenever you generate an access token. Unauthorized (401) requests are not a valid indicator that a new access token must be retrieved.