Add webinar registrant (for previously cancelled registrant)


I’m seeing unsuccessful response HTTP status code 400, Bad Request, when trying to add a registrant to a webinar, from which they have previously been cancelled.

Which Endpoint/s?

POST /webinars/{webinarId}/registrants

How To Reproduce (If applicable)

  1. POST (email, first_name, last_name) to a valid webinar ID at /webinars/{webinarId}/registrants

  2. Confirm HTTP status code 201 created (and add notification email is received from Zoom)

  3. PUT (action: ‘cancel’, email) to the same webinar ID at /webinars/{webinarId}/registrants/status

  4. Confirm HTTP status code 204 (and cancel notification email is received from Zoom)

  5. Repeat step 1 with same values, and instead of HTTP status code 201 created, we receive HTTP status code 400 Bad request, with a body something like:

“{“code”:3072,“message”:“The email cannot be used to register for this webinar”}”

Screenshots (If applicable)


Additional context


I had the same problem awhile back. Check out Zoom’s response here: Error 3072 When Trying to re-Add User to Webinar.

Zoom should really update the API documentation to reflect this.

Thanks for the reply @sbarty.

We will work on making our documentation more clear around canceling / re admitting attendees.


Thanks for this @sbarty @tommy, that works.

I think it would be nice if we only had to make the one call, and Zoom took care of this for us, rather than another network round-trip?

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Happy to help! :slight_smile:

Thanks for the feedback, I will pass this to our team!