Welcome to the RingCentral Community

Check your app to see if you have added this to the redirect url. Change the port 5000 accordingly if you use other port number than 5000

http://localhost:5000/oauth2callback.

What you meant before? So you are not running on a local machine? The error message "No redirect uri is registered for the client" is clearly saying that there is no redirect uri for this app. Check the app or let me know your app client id.

RINGCENTRAL_CLIENT_ID= 'v0t3d4BOTiqaSJ-E-SVCKA'

As I suspected and the error message said, your app does not have the redirect uri at all

Login to your RingCentral Developer portal, select the app and open the app settings to provide the redirect uri accordingly.

I added

http://localhost:5000/oauth2callback

to the settings panel but I am still getting the same error:

{
  "error" : "invalid_client",
  "errors" : [ {
    "errorCode" : "OAU-113",
    "message" : "No redirect uri is registered for the client"
  } ],
  "error_description" : "No redirect uri is registered for the client"
}

Give the system some times to populate the change. And this time you are running locally?

seems to have updated the URI, now i get this:
I get a "Sorry, we don't recognize your email address." error if i just try to use email. Thanks for helping.

Again, you have not enabled SSO for your sandbox account. Use the phone number instead.

I need production data. Please help.

I am lost. I see you are running from 1 problem to another and now you said you need production data. What is that?

Why is sandbox a different setup than prod? Different client_id makes sense but how am I going to use SSO in prod if I can't use it in Sandbox?

Sandbox and production are different environments. You cannot mix them just because of the main purpose of the sandbox is for you to test your app w/o messing up your production account settings/configuration. You cannot login your sandbox with your production credentials and vise versa.

I need SSO so I can test my app in sandbox. I need to test it to "graduate" to prod. I am blocked.

I see that you are just mixing between the two environments, so first upgrade your sandbox app to production (you will find on your sandbox console page instructions to do that). then when you see that your app is approved to be graduated to production you will have your new client ID and client secret which you can use for authentication, here and at this stage, you can use your prod SSO login and you will get the pop-up msg to authorize your login which will then generate the access token required to make the API calls using a python script or simply by using Postman.

If you need SSO for your sandbox account then set it up. I just don't know why you insist using SSO to login when you don't have SSO enabled for your sandbox. Why don't you just simply use the user phone number and password set for your user in sandbox.

yes