How to pass a signed-in user's email as a URL parameter to an external link in Memberstack?

• 

  Chukwudi

  • November 09, 2025 15:16

  Hi Harry,

  You can achieve that with some Javascript code. Here's a sample that should get that done:

  <script>
  document.addEventListener("DOMContentLoaded", function () {
    window.$memberstackDom.getCurrentMember().then(({ data: member }) => {
      if (member && member.auth && member.auth.email) {
        const userEmail = encodeURIComponent(member.auth.email); // URL-safe
        const externalLink = `https://site.com/page?useremail=${userEmail}`;
        
        // Update the link href dynamically
        const linkElement = document.querySelector("#external-link"); // replace with your link selector
        if (linkElement) {
          linkElement.href = externalLink;
        }
  
        // Optional: automatically redirect the user
        // window.location.href = externalLink;
  
        console.log("User-specific link:", externalLink);
      }
    }).catch(err => console.error("Error fetching Memberstack member:", err));
  });
  </script>
  
  
  
  <a id="external-link" href="#">Go to page</a>
  

  0
• 

  A J

  • November 09, 2025 15:17

  Hey Harry Strick, the above code should help you achieve your use-case.
  And if you want to prefill a form with the URL parameter value, you can check this memberscript out.

  0
• 

  Harry Strick

  • November 09, 2025 15:19

  would it be possible to do this for a stripe payment link? to automatically enter the user email in the email section (the memberstack native stripe integration doesn't work for multiple subscriptions, trying to find a workaround.

  memberstack does not support multiple subscriptions of the same plan, it only allows one

  if we sell a productized service where, for example, someone can add more than 1 site to the same plan, we need to be able to accept payments, for the CMS collection we can sort via automations, but the only way it seems to allow multiple subscriptions from the same product is via payment link, which is why i'd like to collect the user email

  thanks so much for your help 🙂 tbh i'd love to pay for a consultant/dev if anyone is available for hire

  0

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