This article will show you how to use server-side validation to validate form fields.
- Navigate to the Forms
- Select the form you want to validate
- Select the Summary tab
- Scroll down to Validation
- Select Custom URL or Hosted API and add a custom URL or a hosted API endpoint to the form
- Click Save
Note: If the validations fail the user will be shown a failure modal. This can be used to include an informative error message explaining why the form failed to submit.