diff --git a/clients/dotnet/ZB.MOM.WW.MxGateway.Client.Tests/BrowseChildrenSmokeTests.cs b/clients/dotnet/ZB.MOM.WW.MxGateway.Client.Tests/BrowseChildrenSmokeTests.cs
new file mode 100644
index 0000000..dd5f48e
--- /dev/null
+++ b/clients/dotnet/ZB.MOM.WW.MxGateway.Client.Tests/BrowseChildrenSmokeTests.cs
@@ -0,0 +1,34 @@
+using Grpc.Core;
+using Grpc.Net.Client;
+using ZB.MOM.WW.MxGateway.Contracts.Proto.Galaxy;
+
+namespace ZB.MOM.WW.MxGateway.Client.Tests;
+
+/// <summary>
+/// Live smoke tests for the BrowseChildren RPC. Skipped by default; set
+/// MXGATEWAY_API_KEY and MXGATEWAY_ENDPOINT to run against a real gateway.
+/// </summary>
+public sealed class BrowseChildrenSmokeTests
+{
+    /// <summary>
+    /// Verifies that BrowseChildren returns a non-zero cache sequence and
+    /// a consistent children/child-has-children count from a live gateway.
+    /// </summary>
+    [Fact(Skip = "Set MXGATEWAY_API_KEY and MXGATEWAY_ENDPOINT to enable.")]
+    public async Task BrowseChildren_LiveGateway_ReturnsRootsWithCacheSequence()
+    {
+        string? apiKey = Environment.GetEnvironmentVariable("MXGATEWAY_API_KEY");
+        string endpoint = Environment.GetEnvironmentVariable("MXGATEWAY_ENDPOINT") ?? "http://localhost:5120";
+
+        Assert.False(string.IsNullOrEmpty(apiKey), "MXGATEWAY_API_KEY must be set.");
+
+        using GrpcChannel channel = GrpcChannel.ForAddress(endpoint);
+        GalaxyRepository.GalaxyRepositoryClient client = new(channel);
+
+        Metadata headers = new() { { "authorization", $"Bearer {apiKey}" } };
+        BrowseChildrenReply reply = await client.BrowseChildrenAsync(new BrowseChildrenRequest(), headers);
+
+        Assert.True(reply.CacheSequence > 0UL);
+        Assert.Equal(reply.Children.Count, reply.ChildHasChildren.Count);
+    }
+}