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

tests/ModelContextProtocol.TestOAuthServer/ClientRegistrationRequest.cs

@@ -55,6 +55,12 @@ internal sealed class ClientRegistrationRequest
     [JsonPropertyName("scope")]
     public string? Scope { get; init; }
 
+    /// <summary>
+    /// Gets or sets the OIDC application type ("web" or "native").
+    /// </summary>
+    [JsonPropertyName("application_type")]
+    public string? ApplicationType { get; init; }
+
     /// <summary>
     /// Gets or sets the contacts for the client.
     /// </summary>

tests/ModelContextProtocol.TestOAuthServer/Program.cs

@@ -120,6 +120,9 @@ public sealed class Program
     /// <summary>Gets the <c>scope</c> field from the most recent Dynamic Client Registration request.</summary>
     public string? LastRegistrationScope { get; private set; }
 
+    /// <summary>Gets the <c>application_type</c> field from the most recent Dynamic Client Registration request.</summary>
+    public string? LastApplicationType { get; private set; }
+
     /// <summary>
     /// Entry point for the application.
     /// </summary>
@@ -681,6 +684,7 @@ public sealed class Program
             }
 
             LastRegistrationScope = registrationRequest.Scope;
+            LastApplicationType = registrationRequest.ApplicationType;
 
             // Validate redirect URIs are provided
             if (registrationRequest.RedirectUris.Count == 0)