title: Stripe: How to set up recurring payments without plan?
body: <p>First time working with Stripe API. Implementing it on WordPress using PHP and JS.
  Working on a donation form. Donor should be able to choose a suggested amount (radio buttons-25,50,75,100) or pay as he/she wishes (text field after selecting 'other'). I was able to get this working.</p>
  
  <p>There is a check box to set the amount up as a recurring payment. I created recurring payment plans for the fixed options like 25, 50, 100 etc. </p>
  
  <p>How do I set up a recurring payment if the donor chooses a custom amount? Can't find the relevant API. Please help.</p>