I would like to create a directory application on my Joomla / Drupal website

You can create your database on Ragic just like creating a spreadsheet form. You can also use our Web Embed function to embed forms that you built on your website.

Moreover, you can manage all your data on our online spreadsheet data backend. You can also embed Web Forms on your website for people to submit data into your database.

If you need a customized UI for your web pages, you can also use our HTTP API to create custom web pages and retrieve/post data from the database.