Using Microsoft Graph API to get SharePoint Online team sites

Question

I'm trying to get access to SharePoint team sites of an organization. I'm using Microsoft Graph API as it's the most complete API for Office 365. I understand how to get an access token and how to use it to make requests. I know it works because I can get a list of groups but when it comes to get all team sites I get an error message:

Code : invalidRequest    
Message : Cannot enumerate sites

Here is my code. I'm testing it out in a console application.

class Program {
    static void Main(string[] args) {
        Program p = new Program();
        var items = p.GetItems();
        items.Wait();
        foreach (var item in items.Result) {
            Console.WriteLine(item.DisplayName);
        }

        Console.ReadLine();
    }

    public async Task<IGraphServiceSitesCollectionPage> GetItems() {
        PublicClientApplication myApp =
            new PublicClientApplication("CLIENT-ID-FROM-DEVELOPPER-CONSOLE");

        //Gets an access token
        AuthenticationResult authenticationResult =
            await myApp.AcquireTokenAsync(
                new string[] {
                    "user.read.all",
                    "sites.read.all",
                    "files.read.all",
                    "group.read.all",
                    "Directory.Read.All"
                }).ConfigureAwait(false);

        //Creates the client with the access token
        GraphServiceClient graphClient = new GraphServiceClient(
            new DelegateAuthenticationProvider(
                async(requestMessage) => {
                    // Append the access token to the request.
                    requestMessage.Headers.Authorization =
                        new AuthenticationHeaderValue("bearer",
                            authenticationResult.AccessToken);
                }));

        //Requests the site objects
        var sites = await graphClient.Sites.Request().GetAsync();

        return sites;
    }
}

I Googled a lot and only found solutions that didn't work for me.

Answer 1

The error message is giving you an accurate description of why this isn't working.

The call to graphClient.Sites.Request().GetAsync() is translated into the HTTP call https://graph.microsoft.com/sites which isn't a valid API endpoint.

You need to provide some additional context such as which site you're looking for. For example, to get the Root Site you would call:

graphClient.Sites["root"].Request().GetAsync();

If you're looking for a Team Site you could use the site's path:

await graphClient.Sites["root"].SiteWithPath("/teams/myawesometeam").Request().GetAsync();

For additional SharePoint Endpoints, see the Graph SharePoint documentation.