diff --git a/src/xAI.Protocol/Extensions.cs b/src/xAI.Protocol/Extensions.cs
index 9f9e37d..85e5b09 100644
--- a/src/xAI.Protocol/Extensions.cs
+++ b/src/xAI.Protocol/Extensions.cs
@@ -19,7 +19,7 @@ public async Task<IEnumerable<LanguageModel>> ListLanguageModelsAsync(Cancellati
         }
 
         /// <summary>Lists available embedding models.</summary>
-        public async Task<IEnumerable<EmbeddingModel>> ListEmbeddingModelsAsync(CancellationToken cancellation)
+        public async Task<IEnumerable<EmbeddingModel>> ListEmbeddingModelsAsync(CancellationToken cancellation = default)
         {
             var models = await client.ListEmbeddingModelsAsync(new Empty(), cancellationToken: cancellation);
             return models.Models;
diff --git a/src/xAI.Tests/SanityChecks.cs b/src/xAI.Tests/SanityChecks.cs
index f324183..6a078b1 100644
--- a/src/xAI.Tests/SanityChecks.cs
+++ b/src/xAI.Tests/SanityChecks.cs
@@ -10,6 +10,21 @@ namespace xAI.Tests;
 
 public class SanityChecks(ITestOutputHelper output)
 {
+    [SecretsFact("CI_XAI_API_KEY")]
+    public async Task NoEmbeddingModels()
+    {
+        var services = new ServiceCollection()
+            .AddxAIProtocol(Environment.GetEnvironmentVariable("CI_XAI_API_KEY")!)
+            .BuildServiceProvider();
+
+        var client = services.GetRequiredService<Models.ModelsClient>();
+
+        var embeddings = await client.ListEmbeddingModelsAsync();
+
+        Assert.NotNull(embeddings);
+        Assert.Empty(embeddings);
+    }
+
     [SecretsFact("CI_XAI_API_KEY")]
     public async Task ListModelsAsync()
     {