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PayPal recommends that new apps integrate with OpenID Connect. Apps integrated with OpenID will continue to work, but won't receive new features.

Log in with PayPal legacy integrations

For Log in with PayPal legacy integrations (prior to January 2018), replace the /connect with /signin/authorize in your links, for example, instead of

1https://www.sandbox.paypal.com/connect?flowEntry=static&client_id=[client id]&scope=[list of scopes]&redirect_uri=[return URL]

Log in with PayPal legacy integrations (prior to January 2018) use:

1https://www.sandbox.paypal.com/signin/authorize?flowEntry=static&client_id=[client id]&scope=[list of scopes]&redirect_uri=[return URL]