diff --git a/src/Leanetec.EConnect.Client/ClientOptions.cs b/src/Leanetec.EConnect.Client/ClientOptions.cs
index 36f1b1a..3dec3ac 100644
--- a/src/Leanetec.EConnect.Client/ClientOptions.cs
+++ b/src/Leanetec.EConnect.Client/ClientOptions.cs
@@ -7,4 +7,6 @@ public class ClientOptions
     public string? ApiKey { get; set; }
 
     public TimeSpan? Timeout { get; set; }
+
+    public Dictionary<string, string?>? QueryStrings { get; set; }
 }
\ No newline at end of file
diff --git a/src/Leanetec.EConnect.Infrastructure/EConnectClient.cs b/src/Leanetec.EConnect.Infrastructure/EConnectClient.cs
index 3fcbf6a..b04f16c 100644
--- a/src/Leanetec.EConnect.Infrastructure/EConnectClient.cs
+++ b/src/Leanetec.EConnect.Infrastructure/EConnectClient.cs
@@ -23,6 +23,11 @@ public class EConnectClient<TError> : IEConnectClient<TError> where TError :  cl
     public async Task<Response<TData, TError>> GetAsync<TData>(string? route = null, object? queryParams = null, CancellationToken cancel = default)
         where TData : class
     {
+        // add global query strings
+        if (_options.QueryStrings is not null)
+            route = route.AddQueryString(_options.QueryStrings);
+
+        // add query strings
         if (queryParams is not null)
             route = route.AddQueryString(queryParams.ToPropertyDictionary());
 
@@ -43,6 +48,11 @@ public class EConnectClient<TError> : IEConnectClient<TError> where TError :  cl
     public async Task<Response<IAsyncEnumerable<TData?>, TError>> GetListAsAsyncEnumerable<TData>(string? route = null, object? queryParams = null, CancellationToken cancel = default)
         where TData : class
     {
+        // add global query strings
+        if (_options.QueryStrings is not null)
+            route = route.AddQueryString(_options.QueryStrings);
+
+        // add query strings
         if (queryParams is not null)
             route = route.AddQueryString(queryParams.ToPropertyDictionary());
 
diff --git a/src/Leanetec.EConnect.Infrastructure/ObjectExtensions.cs b/src/Leanetec.EConnect.Infrastructure/ObjectExtensions.cs
index e52914b..b12e27d 100644
--- a/src/Leanetec.EConnect.Infrastructure/ObjectExtensions.cs
+++ b/src/Leanetec.EConnect.Infrastructure/ObjectExtensions.cs
@@ -15,6 +15,7 @@ public static class ObjectExtensions
             prop => prop.GetValue(obj).ToSafeString()
         );
     }
+
     public static Dictionary<string, string?> ToPropertyDictionary(this Dictionary<string, object?> obj)
     {
         return obj