diff --git a/Acumatica.RESTClient/AuthApi/AuthApi.cs b/Acumatica.RESTClient/AuthApi/AuthApi.cs
index 888852a4..e5c42c7d 100644
--- a/Acumatica.RESTClient/AuthApi/AuthApi.cs
+++ b/Acumatica.RESTClient/AuthApi/AuthApi.cs
@@ -31,7 +31,7 @@ public async static Task RefreshAccessTokenAsync(this ApiClient client, string c
         {
             if (client == null || string.IsNullOrEmpty(client.Token?.Refresh_token))
                 ThrowMissingParameter(nameof(RefreshAccessToken), "Refresh_Token");
-
+            var time = DateTime.UtcNow;
             HttpResponseMessage response = await client!.CallApiAsync(
                 resourcePath:       "/identity/connect/token",
                 method:             HttpMethod.Post,
@@ -51,6 +51,7 @@ public async static Task RefreshAccessTokenAsync(this ApiClient client, string c
             response.EnsureSuccessStatusCode();
 
             client.Token = await DeserializeAsync<Token>(response).ConfigureAwait(false);
+            client.Token?.SetTokenObtainedDT(time);
         }
         /// <summary>
         /// Receives access token for OAuth 2.0 authentication (Resource owner password credentials flow)
@@ -84,6 +85,7 @@ public async static Task ReceiveAccessTokenAsync(
             OAuthScope scope, 
             CancellationToken cancellationToken = default)
         {
+            var time = DateTime.UtcNow;
             HttpResponseMessage response = await client.CallApiAsync(
                resourcePath:        "identity/connect/token",
                method:              HttpMethod.Post,
@@ -103,7 +105,8 @@ public async static Task ReceiveAccessTokenAsync(
 
             await VerifyResponseAsync(client, response, nameof(ReceiveAccessTokenAsync)).ConfigureAwait(false);
 
-            client.Token = await DeserializeAsync<Token>(response).ConfigureAwait(false);
+            client.Token = await DeserializeAsync<Token>(response).ConfigureAwait(false);
+            client.Token?.SetTokenObtainedDT(time);
         }
 
         /// <summary>
@@ -193,6 +196,7 @@ public static async Task ReceiveAccessTokenAuthCodeAsync(
             string code, 
             CancellationToken cancellationToken = default)
         {
+            var time = DateTime.UtcNow;
             HttpResponseMessage response = await client.CallApiAsync(
                resourcePath:        "/identity/connect/token",
                method:              HttpMethod.Post,
@@ -212,7 +216,8 @@ public static async Task ReceiveAccessTokenAuthCodeAsync(
 
             await VerifyResponseAsync(client, response, "RequestToken").ConfigureAwait(false);
 
-            client.Token = await DeserializeAsync<Token>(response).ConfigureAwait(false);
+            client.Token = await DeserializeAsync<Token>(response).ConfigureAwait(false);
+            client.Token?.SetTokenObtainedDT(time);
         }
         #endregion
 
@@ -398,4 +403,4 @@ private static string PrepareScopeParameter(OAuthScope scope)
 
         #endregion
     }
-}
+}
\ No newline at end of file
diff --git a/Acumatica.RESTClient/AuthApi/Model/Token.cs b/Acumatica.RESTClient/AuthApi/Model/Token.cs
index 0ef4e0f4..47611ee4 100644
--- a/Acumatica.RESTClient/AuthApi/Model/Token.cs
+++ b/Acumatica.RESTClient/AuthApi/Model/Token.cs
@@ -1,6 +1,6 @@
-using System.Runtime.Serialization;
-
 using Newtonsoft.Json;
+using System;
+using System.Runtime.Serialization;
 
 namespace Acumatica.RESTClient.AuthApi.Model
 {
@@ -22,6 +22,7 @@ public Token(
             Refresh_token = refreshToken;
             Scope = scope;
             Token_type = token_type;
+            SetTokenObtainedDT();
         }
 
         [DataMember(Name = "access_token", EmitDefaultValue = false)]
@@ -39,6 +40,9 @@ public Token(
         [DataMember(Name = "token_type", EmitDefaultValue = false)]
         public string? Token_type { get; set; }
 
+        public DateTime ObtainedAtUTC{ get; private set; }
+
+        public bool IsValid { get => isValid(); }
         /// <summary>
         /// Returns the JSON string presentation of the object
         /// </summary>
@@ -47,6 +51,16 @@ public virtual string ToJson()
         {
             return JsonConvert.SerializeObject(this, Formatting.Indented);
         }
+
+        public virtual void SetTokenObtainedDT(DateTime? dt = null)
+        {
+            ObtainedAtUTC = dt ?? DateTime.UtcNow;
+        }
+
+        private bool isValid()
+        {
+            return !string.IsNullOrEmpty(Access_token) && (DateTime.UtcNow - ObtainedAtUTC).TotalSeconds < Convert.ToUInt32(Expires_in);
+        }
     }
 
 }
diff --git a/Acumatica.RESTClient/Client/ApiClient.cs b/Acumatica.RESTClient/Client/ApiClient.cs
index 751adb56..8d2c1d23 100644
--- a/Acumatica.RESTClient/Client/ApiClient.cs
+++ b/Acumatica.RESTClient/Client/ApiClient.cs
@@ -249,7 +249,7 @@ public async Task<HttpResponseMessage> CallApiAsync(
       
         public bool HasToken()
         {
-            return Token != null;
+            return Token?.IsValid == true;
         }
         public void Dispose()
         {