Step by Step Guide to building a native HubSpot API integration

HubSpot's API is highly developer-friendly, offering extensive documentation and robust developer accounts, yet creating and maintaining a customer-facing HubSpot API integration presents challenges due to its quirks and nuances. This guide offers insights gained from experience in building complex HubSpot integrations, starting with setting up a free developer account to safely experiment with data, and creating an OAuth app following HubSpot's discontinuation of API key access. Authentication involves installing an OAuth app in a user's HubSpot CRM, with Nango providing a simplified OAuth client solution. Reading and writing data with the HubSpot API requires understanding its limitations, such as the need to manually request object properties and handle rate limits, with Nango offering tools to manage these complexities. A two-way data sync with HubSpot involves importing data into a separate database to overcome API rate limits and associating it with other data, while writing data back to HubSpot requires handling specific challenges like rate limits and custom configurations. The guide concludes by encouraging thorough testing, secure token storage, and considering listing integrations on the HubSpot Marketplace for increased visibility and trust, with Nango providing an alternative for those seeking simplified integration management.