diff --git a/GW2SDK.Tests/Features/Hero/Equipment/MailCarriers/MailCarriers.cs b/GW2SDK.Tests/Features/Hero/Equipment/MailCarriers/MailCarriers.cs
index e2e55bc08..dd5cbc499 100644
--- a/GW2SDK.Tests/Features/Hero/Equipment/MailCarriers/MailCarriers.cs
+++ b/GW2SDK.Tests/Features/Hero/Equipment/MailCarriers/MailCarriers.cs
@@ -1,4 +1,6 @@
-using GuildWars2.Tests.TestInfrastructure;
+using System.Text.Json;
+using GuildWars2.Hero.Equipment.MailCarriers;
+using GuildWars2.Tests.TestInfrastructure;
 
 namespace GuildWars2.Tests.Features.Hero.Equipment.MailCarriers;
 
@@ -32,6 +34,10 @@ await sut.Hero.Equipment.MailCarriers.GetMailCarriers(
                 Assert.InRange(mailCarrier.Order, 0, 1000);
                 Assert.NotEmpty(mailCarrier.IconHref);
                 Assert.NotEmpty(mailCarrier.Name);
+
+                var json = JsonSerializer.Serialize(mailCarrier);
+                var roundtrip = JsonSerializer.Deserialize<MailCarrier>(json);
+                Assert.Equal(mailCarrier, roundtrip);
             }
         );
     }
diff --git a/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrier.cs b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrier.cs
index 86829dbcf..40b4aac57 100644
--- a/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrier.cs
+++ b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrier.cs
@@ -1,8 +1,11 @@
-namespace GuildWars2.Hero.Equipment.MailCarriers;
+using System.Text.Json.Serialization;
+
+namespace GuildWars2.Hero.Equipment.MailCarriers;
 
 /// <summary>Information about a mail carrier.</summary>
 [PublicAPI]
 [DataTransferObject]
+[JsonConverter(typeof(MailCarrierJsonConverter))]
 public sealed record MailCarrier
 {
     /// <summary>The mail carrier ID.</summary>
diff --git a/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlags.cs b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlags.cs
index b327fa597..740b9f198 100644
--- a/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlags.cs
+++ b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlags.cs
@@ -1,7 +1,10 @@
-namespace GuildWars2.Hero.Equipment.MailCarriers;
+using System.Text.Json.Serialization;
+
+namespace GuildWars2.Hero.Equipment.MailCarriers;
 
 /// <summary>Modifiers for mail carriers.</summary>
 [PublicAPI]
+[JsonConverter(typeof(MailCarrierFlagsJsonConverter))]
 public sealed record MailCarrierFlags : Flags
 {
     /// <summary>Whether the mail carrier is the default for new accounts.</summary>
diff --git a/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlagsJsonConverter.cs b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlagsJsonConverter.cs
new file mode 100644
index 000000000..b7abf6fac
--- /dev/null
+++ b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierFlagsJsonConverter.cs
@@ -0,0 +1,51 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using GuildWars2.Json;
+
+namespace GuildWars2.Hero.Equipment.MailCarriers;
+
+internal sealed class MailCarrierFlagsJsonConverter : JsonConverter<MailCarrierFlags>
+{
+    public override MailCarrierFlags? Read(
+        ref Utf8JsonReader reader,
+        Type typeToConvert,
+        JsonSerializerOptions options
+    )
+    {
+        using var json = JsonDocument.ParseValue(ref reader);
+        return Read(json.RootElement);
+    }
+
+    public override void Write(
+        Utf8JsonWriter writer,
+        MailCarrierFlags value,
+        JsonSerializerOptions options
+    )
+    {
+        Write(writer, value);
+    }
+
+    public static MailCarrierFlags Read(JsonElement json)
+    {
+        return new MailCarrierFlags
+        {
+            Default = json.GetProperty("default").GetBoolean(),
+            Other = json.GetProperty("other").GetList(static value => value.GetStringRequired())
+        };
+    }
+
+    public static void Write(Utf8JsonWriter writer, MailCarrierFlags value)
+    {
+        writer.WriteStartObject();
+        writer.WriteBoolean("default", value.Default);
+        writer.WritePropertyName("other");
+        writer.WriteStartArray();
+        foreach (var other in value.Other)
+        {
+            writer.WriteStringValue(other);
+        }
+
+        writer.WriteEndArray();
+        writer.WriteEndObject();
+    }
+}
diff --git a/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierJsonConverter.cs b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierJsonConverter.cs
new file mode 100644
index 000000000..1941b0530
--- /dev/null
+++ b/GW2SDK/Features/Hero/Equipment/MailCarriers/MailCarrierJsonConverter.cs
@@ -0,0 +1,54 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using GuildWars2.Json;
+
+namespace GuildWars2.Hero.Equipment.MailCarriers;
+
+internal sealed class MailCarrierJsonConverter : JsonConverter<MailCarrier>
+{
+    public override MailCarrier? Read(
+        ref Utf8JsonReader reader,
+        Type typeToConvert,
+        JsonSerializerOptions options
+    )
+    {
+        using var document = JsonDocument.ParseValue(ref reader);
+        return Read(document.RootElement);
+    }
+
+    public static MailCarrier? Read(JsonElement json)
+    {
+        return new MailCarrier
+        {
+            Id = json.GetProperty("id").GetInt32(),
+            UnlockItemIds = json.GetProperty("unlock_item_ids").GetList(entry => entry.GetInt32()),
+            Order = json.GetProperty("order").GetInt32(),
+            IconHref = json.GetProperty("icon").GetStringRequired(),
+            Name = json.GetProperty("name").GetStringRequired(),
+            Flags = MailCarrierFlagsJsonConverter.Read(json.GetProperty("flags"))
+        };
+    }
+
+    public override void Write(
+        Utf8JsonWriter writer,
+        MailCarrier value,
+        JsonSerializerOptions options
+    )
+    {
+        writer.WriteStartObject();
+        writer.WriteNumber("id", value.Id);
+        writer.WriteStartArray("unlock_item_ids");
+        foreach (var itemId in value.UnlockItemIds)
+        {
+            writer.WriteNumberValue(itemId);
+        }
+
+        writer.WriteEndArray();
+        writer.WriteNumber("order", value.Order);
+        writer.WriteString("icon", value.IconHref);
+        writer.WriteString("name", value.Name);
+        writer.WritePropertyName("flags");
+        MailCarrierFlagsJsonConverter.Write(writer, value.Flags);
+        writer.WriteEndObject();
+    }
+}