Forum Discussion

Brass Contributor

Jan 22, 2021

Access Denied when making Project Online API call

Hi All, I'm able to get a access token. But when I try to make an Project Online API call using that token, I get "Access denied you do not have permission to perform this action or access this r...

MVP

Jan 23, 2021

Hello rohanw24 ,

The Azure AD permissions don't grant access to Project Online. Typically access to Project Online can be via:

SharePoint Azure ACS using the SharePoint client ID and secret but for some Project Online APIs, you will need to provide a username and password as part of the auth. You could use the SharePointOnlineCredentials class to help auth. These code samples might help: https://github.com/OfficeDev/Project-Samples

Here is a Stack overflow post with a similar query - they went with the SP credentials class too: https://stackoverflow.com/questions/42521163/how-to-get-an-acs-app-only-access-token-for-project-online

Hope that helps

Paul

claudio_7wa

Copper Contributor

Aug 04, 2021

Hi Paul Mather,
due to you words "...but for some Project Online APIs, you will need to provide a username and password...", do you suggest to use a service account to call the Project's Rest APIs?
I'm trying to access to Project Online Rest APIs with a SharePoint App-Only registration (https://stackoverflow.com/questions/68650241/get-project-web-app-and-project-online-data-with-sharepoint-app-only-registratio )but I received different errors, and I'm start thinking that Project's API cannot be called via clientId and clientSecret/certificate.

Thanks.