How to get your HubSpot developer key and OAuth 2 credentials (Legacy Apps)

The text provides a step-by-step guide on obtaining OAuth 2 credentials and a developer API key for creating public apps using HubSpot's developer platform, specifically for legacy applications. It begins with registering for a free HubSpot Developer Account and emphasizes the distinction between developer account API keys and standard API keys, noting their specific use in managing webhooks and other features. The guide continues by detailing the creation of a HubSpot app, which serves as a container for integration settings and OAuth 2 credentials, highlighting the importance of setting appropriate permissions through scopes. Additionally, it notes the necessity of including the OAuth scope for apps created before April 2024 to ensure proper integration functionality. The process concludes with instructions on activating HubSpot integration in Unified.to by using the Client ID, Client secret, and Developer API key obtained during the setup process.