URL_NOT_HTTPS URL must use https

HTTP status
422
Credit
No credit taken

Meaning

Messages carry names and account numbers, so only https is allowed.

Fix

Use an https:// URL with a valid certificate.

Example response

{
  "type": "https://checkslip.com/problems/url-not-https",
  "title": "URL must use https",
  "status": 422,
  "code": "URL_NOT_HTTPS",
  "instance": "0192f3a4-7b1c-7d2e-8f30-4a5b6c7d8e9f"
}