Unable to Connect Zoom with Pabbly – “Invalid Redirect URL” Error

Hello Pabbly Support Team,

I am trying to connect my Zoom account with Pabbly Connect to create a trigger for Zoom Webinar Registration – “Webinar Registration has been created.”

I have followed the Zoom and Pabbly setup instructions and configured the Zoom OAuth settings as follows:

OAuth Redirect URL:
https://connect.pabbly.com/callback-url

OAuth Allow List:
https://connect.pabbly.com/callback-url

However, when I try to authorize/connect the Zoom account through Pabbly, Zoom shows the following error:

“You cannot authorize Pabbly Trigger BETA – Invalid redirect URL. Edit on web portal.”

I have already checked and updated the OAuth Redirect URL in the Zoom Developer Portal, but the issue still occurs.

I have also configured the Zoom Event Subscription with:

• Webhook Method: Webhook
• Event: Webinar → Webinar Registration has been created
• Pabbly webhook endpoint URL: Added successfully
• 
  

Could you please check whether the redirect URL configured for the Pabbly Zoom Trigger BETA has changed or whether there is any specific OAuth URL/setting that I need to use?

I have attached screenshots of the Zoom OAuth configuration and the error for your reference.

Please guide me on the exact configuration required to successfully connect Zoom with Pabbly Connect.

Thank you.

Dear Lingeshwari,

Thank you for reaching out to Pabbly Support.

The "Invalid Redirect URL" error typically occurs when the OAuth Redirect URL configured in your Zoom Developer App does not match the URL expected by Pabbly Connect, or when using custom app credentials with mismatched OAuth settings.

To resolve this issue, please follow these steps:

• OAuth Redirect URL & Allow List: Ensure [https://connect.pabbly.com/callback-url](https://connect.pabbly.com/callback-url) is entered accurately without any extra spaces or missing characters in both the OAuth Redirect URL and OAuth Allow List fields in your Zoom Developer Portal.

• App Type & Configuration: Verify that your custom app in the Zoom Marketplace is created as a General App with OAuth enabled, and that the required scopes (such as Webinar read permissions) are added to the app.

• Secret Token Authorization: If you are configuring a custom app connection, ensure you copy the Secret Token / credentials from your Zoom app and paste them directly into the token field in Pabbly Connect as outlined in our Zoom Integration Guide.

• Default App Option: Alternatively, try using the standard built-in Pabbly Zoom authorization flow to see if the connection succeeds without custom app parameters.

If the error persists after checking these settings, please share a full screenshot making sure that any sensitive or private information is masked and not visible.

Hello,

Just following up on our previous email to check if you need any further assistance from our end.

Please feel free to let us know if you have any questions or concerns. We’ll be happy to assist you.

Hello!

It seems that the matter has been resolved, as we haven’t received any further queries from your side.

If there are any other concerns, please do let us know. We will be happy to assist you.