diff --git a/Vonage.Test.Unit/Conversations/CreateConversation/RequestBuilderTest.cs b/Vonage.Test.Unit/Conversations/CreateConversation/RequestBuilderTest.cs
index 69e1eb27b..96285240f 100644
--- a/Vonage.Test.Unit/Conversations/CreateConversation/RequestBuilderTest.cs
+++ b/Vonage.Test.Unit/Conversations/CreateConversation/RequestBuilderTest.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Net.Http;
 using Vonage.Common.Test.Extensions;
 using Vonage.Conversations.CreateConversation;
 using Xunit;
@@ -35,6 +36,23 @@ public void Build_ShouldReturnFailure_GivenDisplayNameLengthIsAbove50Characters(
                 .Should()
                 .BeParsingFailure("DisplayName length cannot be higher than 50.");
 
+        [Theory]
+        [InlineData("PUT")]
+        [InlineData("DELETE")]
+        [InlineData("HEAD")]
+        [InlineData("OPTIONS")]
+        [InlineData("TRACE")]
+        [InlineData("PATCH")]
+        [InlineData("CONNECT")]
+        public void Build_ShouldReturnFailure_GivenHttpMethodIsNotGetOrPost(string method) =>
+            CreateConversationRequest.Build()
+                .WithCallback(new Callback(new Uri("https://example.com"), "mask",
+                    new CallbackParameters("appId", new Uri("https://example.com")), new HttpMethod(method)))
+                .Create()
+                .Map(request => request.Callback)
+                .Should()
+                .BeParsingFailure("Callback HttpMethod must be GET or POST.");
+
         [Theory]
         [InlineData("")]
         [InlineData(" ")]
@@ -55,6 +73,17 @@ public void Build_ShouldReturnFailure_GivenNameLengthIsAbove100Characters() =>
                 .Should()
                 .BeParsingFailure("Name length cannot be higher than 100.");
 
+        [Fact]
+        public void Build_ShouldSetCallback() =>
+            CreateConversationRequest.Build()
+                .WithCallback(new Callback(new Uri("https://example.com"), "mask",
+                    new CallbackParameters("appId", new Uri("https://example.com")), HttpMethod.Get))
+                .Create()
+                .Map(request => request.Callback)
+                .Should()
+                .BeSuccess(new Callback(new Uri("https://example.com"), "mask",
+                    new CallbackParameters("appId", new Uri("https://example.com")), HttpMethod.Get));
+
         [Fact]
         public void Build_ShouldSetDisplayName() =>
             CreateConversationRequest.Build()
diff --git a/Vonage/Conversations/CreateConversation/Callback.cs b/Vonage/Conversations/CreateConversation/Callback.cs
new file mode 100644
index 000000000..4aba5f88d
--- /dev/null
+++ b/Vonage/Conversations/CreateConversation/Callback.cs
@@ -0,0 +1,10 @@
+using System;
+using System.Net.Http;
+
+namespace Vonage.Conversations.CreateConversation;
+
+public record Callback(
+    Uri Url,
+    string EventMask,
+    CallbackParameters Parameters,
+    HttpMethod Method);
\ No newline at end of file
diff --git a/Vonage/Conversations/CreateConversation/CallbackParameters.cs b/Vonage/Conversations/CreateConversation/CallbackParameters.cs
new file mode 100644
index 000000000..927057860
--- /dev/null
+++ b/Vonage/Conversations/CreateConversation/CallbackParameters.cs
@@ -0,0 +1,5 @@
+using System;
+
+namespace Vonage.Conversations.CreateConversation;
+
+public record CallbackParameters(string ApplicationId, Uri NccoUrl);
\ No newline at end of file
diff --git a/Vonage/Conversations/CreateConversation/CreateConversationRequest.cs b/Vonage/Conversations/CreateConversation/CreateConversationRequest.cs
index a10c6ef63..b90769aec 100644
--- a/Vonage/Conversations/CreateConversation/CreateConversationRequest.cs
+++ b/Vonage/Conversations/CreateConversation/CreateConversationRequest.cs
@@ -8,6 +8,10 @@ namespace Vonage.Conversations.CreateConversation;
 /// <inheritdoc />
 public readonly struct CreateConversationRequest : IVonageRequest
 {
+    /// <summary>
+    /// </summary>
+    public Maybe<Callback> Callback { get; internal init; }
+
     /// <summary>
     /// </summary>
     public Maybe<string> DisplayName { get; internal init; }
diff --git a/Vonage/Conversations/CreateConversation/CreateConversationRequestBuilder.cs b/Vonage/Conversations/CreateConversation/CreateConversationRequestBuilder.cs
index b1469e8d9..a7aea2d96 100644
--- a/Vonage/Conversations/CreateConversation/CreateConversationRequestBuilder.cs
+++ b/Vonage/Conversations/CreateConversation/CreateConversationRequestBuilder.cs
@@ -1,5 +1,9 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
 using Vonage.Common.Client;
+using Vonage.Common.Failures;
 using Vonage.Common.Monads;
 using Vonage.Common.Validation;
 
@@ -9,6 +13,9 @@ internal class CreateConversationRequestBuilder : IBuilderForOptional
 {
     private const int DisplayNameMaxLength = 50;
     private const int NameMaxLength = 100;
+
+    private readonly IEnumerable<HttpMethod> allowedMethods = new[] {HttpMethod.Get, HttpMethod.Post};
+    private Maybe<Callback> callback;
     private Maybe<Properties> properties;
     private Maybe<string> name;
     private Maybe<string> displayName;
@@ -21,13 +28,20 @@ public Result<CreateConversationRequest> Create() => Result<CreateConversationRe
                 DisplayName = this.displayName,
                 ImageUrl = this.uri,
                 Properties = this.properties,
+                Callback = this.callback,
             })
         .Map(InputEvaluation<CreateConversationRequest>.Evaluate)
         .Bind(evaluation => evaluation.WithRules(
             VerifyName,
             VerifyNameLength,
             VerifyDisplayName,
-            VerifyDisplayNameLength));
+            VerifyDisplayNameLength, this.VerifyCallbackHttpMethod));
+
+    public IBuilderForOptional WithCallback(Callback value)
+    {
+        this.callback = value;
+        return this;
+    }
 
     public IBuilderForOptional WithDisplayName(string value)
     {
@@ -53,6 +67,14 @@ public IBuilderForOptional WithProperties(Properties value)
         return this;
     }
 
+    private Result<CreateConversationRequest> VerifyCallbackHttpMethod(CreateConversationRequest request) =>
+        request.Callback.Match(
+            some => this.allowedMethods.Contains(some.Method)
+                ? Result<CreateConversationRequest>.FromSuccess(request)
+                : ResultFailure.FromErrorMessage("Callback HttpMethod must be GET or POST.")
+                    .ToResult<CreateConversationRequest>(),
+            () => request);
+
     private static Result<CreateConversationRequest> VerifyDisplayName(CreateConversationRequest request) =>
         request.DisplayName.Match(
             some => InputValidation.VerifyNotEmpty(request, some, nameof(request.DisplayName)),
@@ -80,6 +102,13 @@ private static Result<CreateConversationRequest> VerifyNameLength(CreateConversa
 /// </summary>
 public interface IBuilderForOptional : IVonageRequestBuilder<CreateConversationRequest>
 {
+    /// <summary>
+    ///     Sets the Callback.
+    /// </summary>
+    /// <param name="value">The callback.</param>
+    /// <returns>The builder.</returns>
+    IBuilderForOptional WithCallback(Callback value);
+
     /// <summary>
     ///     Sets the Display Name.
     /// </summary>
diff --git a/Vonage/Conversations/CreateConversation/CreateConversationResponse.cs b/Vonage/Conversations/CreateConversation/CreateConversationResponse.cs
index 57f156afd..8f12ae5d1 100644
--- a/Vonage/Conversations/CreateConversation/CreateConversationResponse.cs
+++ b/Vonage/Conversations/CreateConversation/CreateConversationResponse.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.Text.Json.Serialization;
 using Vonage.Common;
 using Vonage.Common.Monads;
@@ -27,11 +26,4 @@ public record Timestamp(DateTimeOffset Created,
     [property: JsonConverter(typeof(MaybeJsonConverter<DateTimeOffset>))]
     Maybe<DateTimeOffset> Destroyed);
 
-public record Properties(
-    [property: JsonPropertyName("ttl")] int TimeToLive, string Type,
-    [property: JsonPropertyName("custom_sort_key")]
-    string CustomSortKey,
-    [property: JsonPropertyName("custom_data")]
-    Dictionary<string, string> CustomData);
-
 public record Links(HalLink Self);
\ No newline at end of file
diff --git a/Vonage/Conversations/CreateConversation/Properties.cs b/Vonage/Conversations/CreateConversation/Properties.cs
new file mode 100644
index 000000000..ce34fc64d
--- /dev/null
+++ b/Vonage/Conversations/CreateConversation/Properties.cs
@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace Vonage.Conversations.CreateConversation;
+
+public record Properties(
+    [property: JsonPropertyName("ttl")] int TimeToLive, string Type,
+    [property: JsonPropertyName("custom_sort_key")]
+    string CustomSortKey,
+    [property: JsonPropertyName("custom_data")]
+    Dictionary<string, string> CustomData);
\ No newline at end of file