Developer API
Seamless Integration with QuickBooks & FreshBooks.

Quick Overview Of The Publication Process

  1. Create
    1. Create letterHUB account
    2. Create API Key at Settings page by providing Key Name and Application Type.
  2. Develop
    1. Develop your application
    2. Integrate LetterHUB API to request direct mails.
  3. Deploy
    1. Get and configure your app’s production keys.
  4. Release
    1. Test your app for technical and security compliance.
    2. Release for public use.
Get Connected
Once connected, you can send invoices, reports, reminders, or announcements directly to your clients manually or automatically, whichever you prefer. No need to have to reload any client information or addresses as that information is automatically and securely loaded into Letter Hub’s program.