Add application_type to the Dynamic Client Registration request (#1613)

tests/ModelContextProtocol.AspNetCore.Tests/OAuth/AuthTests.cs

@@ -110,6 +110,33 @@ public class AuthTests : OAuthTestBase
 
         await using var client = await McpClient.CreateAsync(
             transport, loggerFactory: LoggerFactory, cancellationToken: TestContext.Current.CancellationToken);
+
+        Assert.Equal("native", TestOAuthServer.LastApplicationType);
+    }
+
+    [Fact]
+    public async Task DynamicClientRegistration_UsesExplicitApplicationType()
+    {
+        await using var app = await StartMcpServerAsync();
+
+        await using var transport = new HttpClientTransport(new()
+        {
+            Endpoint = new(McpServerUrl),
+            OAuth = new ClientOAuthOptions()
+            {
+                RedirectUri = new Uri("http://localhost:1179/callback"),
+                AuthorizationRedirectDelegate = HandleAuthorizationUrlAsync,
+                DynamicClientRegistration = new()
+                {
+                    ApplicationType = "web",
+                },
+            },
+        }, HttpClient, LoggerFactory);
+
+        await using var client = await McpClient.CreateAsync(
+            transport, loggerFactory: LoggerFactory, cancellationToken: TestContext.Current.CancellationToken);
+
+        Assert.Equal("web", TestOAuthServer.LastApplicationType);
     }
 
     [Fact]
@@ -124,7 +151,11 @@ public class AuthTests : OAuthTestBase
             {
                 RedirectUri = new Uri("http://localhost:1179/callback"),
                 AuthorizationRedirectDelegate = HandleAuthorizationUrlAsync,
-                ClientMetadataDocumentUri = new Uri(ClientMetadataDocumentUrl)
+                ClientMetadataDocumentUri = new Uri(ClientMetadataDocumentUrl),
+                DynamicClientRegistration = new()
+                {
+                    ApplicationType = "web",
+                },
             },
         }, HttpClient, LoggerFactory);
 
@@ -258,6 +289,10 @@ public class AuthTests : OAuthTestBase
                 RedirectUri = new Uri("http://localhost:1179/callback"),
                 AuthorizationRedirectDelegate = HandleAuthorizationUrlAsync,
                 ClientMetadataDocumentUri = new Uri("http://invalid-cimd.example.com"),
+                DynamicClientRegistration = new()
+                {
+                    ApplicationType = "web",
+                },
             },
         }, HttpClient, LoggerFactory);