Hubspot is the online software product for the inbound marketing which has features for the social media marketing, email marketing, content management, web analytics and the search engine optimization among others. Hubspot also provides the API which allows the third parties to programmatically access their business logic and the data. The API allows the access to the Hubspot’s aggregate class and marketing data for the third-party web and the mobile developers, as well as integration with individual business websites. You can read this blog for more details of Hubspot API Integration.