Getting Blank Page While Trying to Connect Square OAuth (Sandbox)

Questions
1

I’m implementing Square OAuth flow in my .NET MVC application using the sandbox environment. However, when I try to connect, I get redirected to a blank page instead of the Square authorization screen.

Here’s the code I’m using to generate the OAuth URL and redirect:

private const string ClientId = “sandbox-sq0idb-2fOIpoGtJ2dv7s0eyvV0AQ”;
private const string ClientSecret = “sandbox-sq0csb-_oWmr1PoIO8x_dQL10-_cn-kTmySHiWOtf1icERlcF8”;
private const string RedirectUri = “http://localhost:5237/Square/Callback”;

var state = Guid.NewGuid().ToString();

var url = $“https://connect.squareupsandbox.com/oauth2/authorize?” +
$“client_id={ClientId}” +
$“&scope=MERCHANT_PROFILE_READ%20PAYMENTS_READ” +
$“&session=false” +
$“&state={state}” +
$“&redirect_uri={Uri.EscapeDataString(RedirectUri)}”;

return Redirect(url);

any one please tell me whats wrong with this code

2

:waving_hand: I’m Square Dev AI, here to help answer your question!
Based on the information you’ve provided, the following documentation will help answer your question:

https://developer.squareup.com/docs/oauth-api/walkthrough2

Additional Documentation

OAuth Walkthrough: Test Authorization with Web Server
Square .NET SDK Quickstart
Create the Redirect URL and Square Authorization Page URL

If this documentation helped you find a solution, please check the box indicating that this reply solves the problem.
Otherwise one of our Developer Advocates will provide additional assistance shortly.

3

Is the sandbox Seller Dashboard open in another tab when testing the OAuth flow in sandbox? It’s a requirement in sandbox. :slight_smile: