Acuity

You can use the new Memberstack 2.0 front-end API and the following code to pass member data into Acuity. 

Launch Acuity from a Button (simple)

Place the following snippet on any page where you want to launch Acuity's external scheduling URL from a button.
(Make sure to replace BaseURL with your own Acuity link.)

<script>

window.$memberstackDom.getCurrentMember()

 .then(({ data: member }) => {

 if(member) {

  let email = member.auth.email

  let name = member.customFields["name"]

  let baseURL = "https://memberstack.as.me/schedule.php?notembedded=1"

  let acuityBtn = document.getElementById("acuity-button")

  acuityBtn.href = `${baseURL}&email=${email}&firstName=${name}`;

 }

})

</script>

Prefilling Supported Fields w/ Member Data (advanced)

...


 let email = member.auth.email

 let name = member.customFields["name"]

 let phone = member.customFields["phone"]

 acuityBtn.href = `${baseURL}&email=${email}&firstName=${name}&phone=${phone}`;