unable to get auth from cerner sandbox : help needed..

[Ashok Sharma]

I am developing patient facing app using python. I am constantly getting following error

Patient" was attempting to request access to healthcare data with Cerner FHIR Public Sandbox; unfortunately, the application doesn't appear to be compatible. If you require further assistance, please contact support.

If possible, please bookmark this page or take a screen shot of it to expedite the technical support process. For assistance, contact support via:

Website:

https://groups.google.com/g/cerner-fhir-developers

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Information to provide to Technical Support

Correlation ID:

77cf7d53-842b-402d-a5fd-dfa79e0c6ff7

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Information to provide to Penguin - Patient

The requested redirect URI does not match the one registered for "Penguin - Patient".

Error Code:

urn:cerner:error:authorization-server:oauth2:grant:invalid-redirect-uri

Cerner's developer portal may provide useful information to assist in resolving this issue.

I am using smart-on-fhir/client-py python module. 

The code works well with EPIC sandbox system, but not with Cerner. 

Greatly appreciate any help resolving this issue, 

- Ashok Sharma

[Aaron McGinn (Oracle Cerner)]

When you have multiple redirect_uris associated with your app, you have to provide one in your auth request—which you are doing! Our authorization server uses strict path validation [1], which includes trailing slashes in your redirection URI. This looks like it is what is happening in your case. The redirect_uri you are attempting to use has a trailing slash as registered in the code Console. Adding this trailing slash to your request should resolve this error!

[1] https://fhir.cerner.com/authorization/#faq

-Aaron (Oracle Cerner)