diff --git a/DigitalData.Auth.Abstractions/IAuthListenHandler.cs b/DigitalData.Auth.Abstractions/IAuthListenHandler.cs
index 925ff9a..5d71a33 100644
--- a/DigitalData.Auth.Abstractions/IAuthListenHandler.cs
+++ b/DigitalData.Auth.Abstractions/IAuthListenHandler.cs
@@ -3,4 +3,6 @@
 public interface IAuthListenHandler
 {
     Task ReceiveKeyAsync(string name, string value);
+
+    Task<string> GetPublicKeyAsync(string issuer, string audience);
 }
\ No newline at end of file
diff --git a/DigitalData.Auth.Abstractions/IAuthSenderHandler.cs b/DigitalData.Auth.Abstractions/IAuthSenderHandler.cs
index 20c4828..ab57e28 100644
--- a/DigitalData.Auth.Abstractions/IAuthSenderHandler.cs
+++ b/DigitalData.Auth.Abstractions/IAuthSenderHandler.cs
@@ -3,4 +3,6 @@
 public interface IAuthSenderHandler
 {
     Task SendKeyAsync(string name, string key);
+
+    Task<string> GetPublicKeyAsync(string issuer, string audience);
 }
\ No newline at end of file