'Invalid request : Redirect URI mismatch.' despite using ngrok

[Nad (Nadine)]

Description
Hi all, I am trying to integrate zoom into an app I’m developing, but I have been stuck on this error for 2 days: ‘Invalid request : Redirect URI mismatch.’

I am developing the app on localhost and used ngrok and white-listed the re-direct urls as recommended. However, despite doing all that, I am still getting this error and can’t seem to identify the cause of this. Would greatly appreciate your help if you can tell me what I am doing wrong!

This is my app link: https://zoom.us/oauth/authorize?response_type=code&client_id=uhZaUDEvQiewpSECmxZPkg&redirect_uri=https%3A%2F%2F187929699399.ngrok.io%2Fzoom%2Fget-access-token

Error
{ reason: ‘Invalid request : Redirect URI mismatch.’,
error: ‘invalid_request’ } },

Which App Type (OAuth / Chatbot / JWT / Webhook)?
OAuth

Which Endpoint/s?
https://zoom.us/oauth/token

How To Reproduce (If applicable)

1. Successfully obtained authorization_code in step 1
2. Redirect to https://187929699399.ngrok.io/zoom/get-access-token successfully
3. Perform post request:

https://zoom.us/oauth/token?grant_type=authorization_code&code=5GZyeq2Oii_HkO8eriES-OrrKvKAtUKaw&redirect_uri=https://187929699399.ngrok.io/zoom/authorization-success

4. Receive ‘Invalid request : Redirect URI mismatch.’ error

Screenshots (If applicable)

List of redirect urls in white-list:

• https://187929699399.ngrok.io/zoom/authorization-success
• https://187929699399.ngrok.io/zoom/get-access-token
• https://187929699399.ngrok.io/zoom/authorization-success/
• https://187929699399.ngrok.io
• https://187929699399.ngrok.io/

[DeveloperBot]

Hey @Nad

Thanks for posting on the Zoom Devforum! I am still learning, but I will try my best to help answer your question.

Checkout these related threads that may have the answer you are looking for:

Getting Invalid request : Redirect URI mismatch error

Description I’m getting a Redirect URI mismatch error when trying to get an access token after getting the code. It’s probably because I misunderstood how redirect URI works. I tried the following: Exact same URI as in app settings Same URI that I provided in oauth/authorize call when getting the code I’m getting the same error every time. Error { “reason”: “Invalid request : Redirect URI mismatch.”, “error”: “invalid_request” } Which App Type (OAuth / Chatbot / JWT / Webhook)? OAut…

Persistent "Redirect URI mismatch" error

Description When making the POST request to obtain the access and refresh tokens, I keep receiving a 403 status code, with the “Redirect URI mismatch” error. Error {“reason”:“Invalid request : Redirect URI mismatch.”,“error”:“invalid_request”} Which App Type (OAuth / Chatbot / JWT / Webhook)? OAuth2 Which Endpoint/s? https://zoom.us/oauth/token Additional context I’m stuck at step 2 of OAuth2 authorization. I have obtained the authorization code from step 1, and now I’m calling the endp…

OAuth with zoom - redirect uri is not used for redirect

Hi, I’m currently working on an OAuth application with Zoom. Here the error occurs that the redirect Uri I specified is not accepted, but I am sent back to the zoom page. My Request URL: https://zoom.us/oauth/authorize?client_id=XXX&response_type=code&redirect_uri=http://localhost:8080/vccfg/login/oauth2/code/zoom&state=XXX Location I get send to after the request: http://zoom.us/vccfg/login/oauth2/code/zoom?code=XXX Screenshot from my browser: [Zoom%20OAuth%20Redirect%20Browser%20Screensho…

If these threads did not help, please let us know by replying back here and someone from the Developer Relations team will get back to you shortly.

Thanks,
DeveloperBot

[Nad (Nadine)]

Hi thank you, I have read the threads above but still can’t identify the problem

Edit: I used the same redirect url in https://zoom.us/oauth/authorize? and https://zoom.us/oauth/token, and managed to get the access token, but don’t really understand why

[tommy (Tommy Gaessler)]

Hey @Nad,

Let me know if this helps explain things:

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The Redirect URI needs to be the same URI from the authorization (install URL) through to the Get Access Token request. So with these URLs set:

When I go to install the app from the “Activation” page, it defaults the redirect URI to the one specified in the “Redirect URL for OAuth” input:

https://zoom.us/oauth/authorize?response_type=code&client_id=ztmR8sxaSBGZ66b5laR7Ag&redirect_uri=https://zoom.us

So if I proceed to install the app, the redirect uri needs to be exactly https://zoom.us for the get access token request or else you will see the Redirect URI mismatch error

That being said, if from the start with the same settings above, I add the /meetings path to the authorize install url:

https://zoom.us/oauth/authorize?response_type=code&client_id=ztmR8sxaSBGZ66b5laR7Ag&redirect_uri=https://zoom.us/meeting

And then after I get the auth code, I make the access token request and set the redirect uri to the same as the one in the install url https://zoom.us/meeting it will work.

Does that make sense? So you can have dynamic redirect urls, but they need to be the same for both the authorize url and the get access token url requests.

More details here on how to handle this in your code:

Does zoom support more than two environments for oauth2?

Hey @tuancode, @michael.solomon, This is totally possible! Let me walk you through how to do this with the base domain of example.com For your whitelist, simply add your base domain: https://example.com Then in your dev/prod redirect url field, add a default redirect, https://any.example.com (this will be programmatically overridden to the correct sub domain, continue reading below) Now, with your install URL (the url mentioned in Step 1. of the OAuth guide) in your code, dyna…

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Thanks,
Tommy

[Nad (Nadine)]

@tommy Many thanks, it was very clear

[tommy (Tommy Gaessler)]

You are welcome!

-Tommy