diff --git a/src/GmRelay.Shared/Features/Sessions/CreateSession/Wizard/WizardPayload.cs b/src/GmRelay.Shared/Features/Sessions/CreateSession/Wizard/WizardPayload.cs
new file mode 100644
index 0000000..6ecc43e
--- /dev/null
+++ b/src/GmRelay.Shared/Features/Sessions/CreateSession/Wizard/WizardPayload.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace GmRelay.Shared.Features.Sessions.CreateSession.Wizard;
+
+public enum WizardCreationType { Single, Pool }
+
+public enum WizardVisibility { Public, Club, Members }
+
+public sealed class WizardSlotInput
+{
+    public DateTimeOffset ScheduledAt { get; set; }
+    public int MaxPlayers { get; set; }
+    public bool Waitlist { get; set; }
+}
+
+public sealed class WizardSingleInput
+{
+    public DateTimeOffset? ScheduledAt { get; set; }
+    public int? MaxPlayers { get; set; }
+}
+
+public sealed class WizardPayload
+{
+    public WizardCreationType? Type { get; set; }
+    public string? Title { get; set; }
+    public string? Description { get; set; }
+    public string? ImageFileId { get; set; }
+    public string? ImageUrl { get; set; }
+    public string? System { get; set; }
+    public int? DurationMinutes { get; set; }
+    public WizardVisibility? Visibility { get; set; }
+    public Guid? ClubId { get; set; }
+    public bool? PublishInShowcase { get; set; }
+    public bool? Waitlist { get; set; }
+    public WizardSingleInput? Single { get; set; }
+    public WizardPoolInput? Pool { get; set; }
+}
+
+public sealed class WizardPoolInput
+{
+    public List<WizardSlotInput> Slots { get; set; } = new();
+}
+
+[JsonSerializable(typeof(WizardPayload))]
+[JsonSerializable(typeof(WizardSingleInput))]
+[JsonSerializable(typeof(WizardPoolInput))]
+[JsonSerializable(typeof(WizardSlotInput))]
+[JsonSourceGenerationOptions(
+    WriteIndented = false,
+    PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase,
+    DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull)]
+public partial class WizardPayloadJsonContext : JsonSerializerContext
+{
+}