Calendly iframe: there is no reschedule event, use webhooks instead

TL;DR

The accepted answer confirms there is no official reschedule listener: when a reschedule happens, Calendly fires the cancelled and created webhook events instead.

Steps

1. When your Calendly iframe integration misses reschedules, stop looking for a reschedule message event, there isnt one. Subscribe to Calendly webhooks: a reschedule arrives as a cancelled event plus a created event. Match them by invitee or event details on your side to record it as a reschedule rather than a cancel plus a new booking.

When to use

You are seeing this: When your Calendly iframe integration misses reschedules, stop looking for a reschedule message event, there isnt one. Use this skill when you run into "Calendly iframe: there is no reschedule event, use webhooks instead".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Source: Stack Overflow #69102073 (accepted answer, 5 votes): the asker captured the calendly.event_scheduled message from the embedded iframe but found no equivalent event fires on reschedule. The accepted answer confirms there is no official reschedule listener: when a reschedule happens, Calendly fires the cancelled and created webhook events instead.

Verified resolution: When your Calendly iframe integration misses reschedules, stop looking for a reschedule message event, there isnt one. Subscribe to Calendly webhooks: a reschedule arrives as a cancelled event plus a created event. Match them by invitee or event details on your side to record it as a reschedule rather than a cancel plus a new booking.

Source URL: https://stackoverflow.com/questions/69102073/how-to-capture-calendly-iframe-reschedule-event-from-javascript