diff --git a/Models/Api/Error.cs b/Models/Api/Error.cs
new file mode 100644
index 0000000..6712670
--- /dev/null
+++ b/Models/Api/Error.cs
@@ -0,0 +1,34 @@
+using System.Text.Json.Serialization;
+
+using NejCommon.Models;
+
+namespace NejCommon.Models
+{
+    /// <summary>
+    /// There was an error
+    /// </summary>
+    public partial class Error  
+    {
+        public Error()
+        {
+
+        }
+        public Error(string message, decimal? statusCode = null, object? _Error = null)
+        {
+            this.Message = message;
+            this.StatusCode = statusCode;
+            this._Error = _Error;
+        }
+
+        public string Message { get; set; } = null!;
+
+        public decimal? StatusCode { get; set; }
+
+        /// <summary>
+        /// Gets or Sets _Error
+        /// </summary>  
+        [JsonPropertyName("error")]
+        public object? _Error { get; set; }
+
+    }
+}
diff --git a/Models/ModelBinder.cs b/Models/Api/ModelBinder.cs
similarity index 100%
rename from Models/ModelBinder.cs
rename to Models/Api/ModelBinder.cs
diff --git a/Models/Api/Pagination.cs b/Models/Api/Pagination.cs
new file mode 100644
index 0000000..c4cf5f6
--- /dev/null
+++ b/Models/Api/Pagination.cs
@@ -0,0 +1,29 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace NejCommon.Models;
+public class Pagination
+{
+    public int Offset { get; set; } = 0;
+
+    const int maxCount = 50;
+    private int _count = 10;
+    [Range(1, 100)]
+    public int Count
+    {
+        get
+        {
+            return _count;
+        }
+        set
+        {
+            _count = (value > maxCount) ? maxCount : value;
+        }
+    }
+}
+
+public class PaginationResponse<TType>{
+    public int TotalCount { get; set; }
+    public int Offset { get; set; }
+    public int Count { get; set; }
+    public IAsyncEnumerable<TType> Data { get; set; } = default!;
+}
\ No newline at end of file
diff --git a/Models/DateOnlyFrame.cs b/Models/DateOnlyFrame.cs
new file mode 100644
index 0000000..bd63724
--- /dev/null
+++ b/Models/DateOnlyFrame.cs
@@ -0,0 +1,43 @@
+using System.Linq.Expressions;
+using Microsoft.AspNetCore.Mvc;
+
+namespace NejAccountingAPI.Models;
+
+public class DateOnlyFrame
+{
+    public DateOnlyFrame()
+    {
+
+    }
+    public DateOnlyFrame(DateOnly fromDate, DateOnly toDate)
+    {
+        this.fromDate = fromDate;
+        this.toDate = toDate;
+    }
+
+
+    private DateOnly _fromDate = DateOnly.MinValue;
+    private DateOnly _toDate = DateOnly.MaxValue;
+    public DateOnly fromDate { get { return _fromDate; } set { _fromDate = value; Invalid = false; } }
+    public DateOnly toDate { get { return _toDate; } set { _toDate = value; Invalid = false; } }
+    [FromServices]
+    public bool Invalid { get; private set;} = true;
+
+    public override string ToString()
+    {
+        var from = (fromDate == DateOnly.MinValue) ? "" : (fromDate.ToShortDateString());
+        var to = (toDate == DateOnly.MaxValue) ? "" : (toDate.ToShortDateString());
+        var hyphen = from != "" && to != "" ? "-" : "";
+        return $"{from}{hyphen}{to}";
+    }
+
+    public static Expression<Func<TType, bool>> Conditional<TType>(Expression<Func<TType, DateOnly>> dateAcessor, DateOnlyFrame frame)
+    {
+        return e => dateAcessor.Compile()(e) >= frame.fromDate && dateAcessor.Compile()(e) <= frame.toDate;
+    }
+
+    public DateTimeFrame ToDateTimeFrame()
+    {
+        return new DateTimeFrame(fromDate.ToDateTime(TimeOnly.MinValue), toDate.ToDateTime(TimeOnly.MaxValue));
+    }
+}
\ No newline at end of file
diff --git a/Models/DateTimeFrame.cs b/Models/DateTimeFrame.cs
new file mode 100644
index 0000000..c1d61ce
--- /dev/null
+++ b/Models/DateTimeFrame.cs
@@ -0,0 +1,35 @@
+using System.Linq.Expressions;
+using NejCommon.Utils;
+
+namespace NejAccountingAPI.Models;
+public class DateTimeFrame
+{
+    public DateTimeFrame(){
+
+    }
+    public DateTimeFrame(DateTime fromDate, DateTime toDate)
+    {
+        FromDate = fromDate;
+        ToDate = toDate;
+    }
+    
+    public DateTime FromDate { get; set; } = DateTime.MinValue;
+    public DateTime ToDate { get; set; } = DateTime.MaxValue;
+
+    public override string ToString()
+    {
+        var from = (FromDate == DateTime.MinValue) ? "" : ("-" + FromDate.ToShortDateString());
+        var to = (ToDate == DateTime.MaxValue) ? "" : ("-" + ToDate.ToShortDateString());
+        return $"{from}{to}";
+    }
+
+    public static Expression<Func<TType, bool>> Conditional<TType>(Expression<Func<TType, DateTime>> dateAcessor, DateTimeFrame frame)
+    {
+        return e => dateAcessor.Compile()(e) >= frame.FromDate && dateAcessor.Compile()(e) <= frame.ToDate;
+    }
+
+    public DateOnlyFrame ToDateOnlyFrame()
+    {
+        return new DateOnlyFrame(FromDate.ToDateOnly(), ToDate.ToDateOnly());
+    }
+}
\ No newline at end of file