Marketing & CRM
Use the code you get after a user authorizes your app to get an access token and refresh token. The access token will be used to authenticate requests that your app makes. Access tokens expire after 6 hours, so you can use the refresh token to get a new access token when the first access token expires.
Note: HubSpot access tokens will fluctuate in size as we change the information that is encoded the tokens. We recommend allowing for tokens to be up to 300 characters to account for any changes we may make.