diff --git a/src/Color-Chan.Discord.Commands/Attributes/SlashCommandPermissionAttribute.cs b/src/Color-Chan.Discord.Commands/Attributes/SlashCommandPermissionAttribute.cs
index c168358f..7293a313 100644
--- a/src/Color-Chan.Discord.Commands/Attributes/SlashCommandPermissionAttribute.cs
+++ b/src/Color-Chan.Discord.Commands/Attributes/SlashCommandPermissionAttribute.cs
@@ -17,12 +17,14 @@ public class SlashCommandPermissionAttribute : Attribute
         /// </summary>
         /// <param name="id">The id of the role or user.</param>
         /// <param name="type">Specifies the type that the ID belongs to.</param>
-        public SlashCommandPermissionAttribute(ulong id, DiscordApplicationCommandPermissionsType type)
+        /// <param name="allow">Whether to allow the user/role to use the command.</param>
+        public SlashCommandPermissionAttribute(ulong id, DiscordApplicationCommandPermissionsType type, bool allow = true)
         {
             Id = id;
             Type = type;
+            Allow = allow;
         }
-        
+
         /// <summary>
         ///     The id of the role or user..
         /// </summary>
@@ -32,5 +34,10 @@ public SlashCommandPermissionAttribute(ulong id, DiscordApplicationCommandPermis
         ///     Specifies the type that the ID belongs to.
         /// </summary>
         public DiscordApplicationCommandPermissionsType Type { get; init; }
+
+        /// <summary>
+        ///     The id of the role or user..
+        /// </summary>
+        public bool Allow { get; init; } = true;
     }
 }
\ No newline at end of file
diff --git a/src/Color-Chan.Discord.Commands/Extensions/DiscordGuildApplicationCommandPermissionsExtensions.cs b/src/Color-Chan.Discord.Commands/Extensions/DiscordGuildApplicationCommandPermissionsExtensions.cs
new file mode 100644
index 00000000..07421e6f
--- /dev/null
+++ b/src/Color-Chan.Discord.Commands/Extensions/DiscordGuildApplicationCommandPermissionsExtensions.cs
@@ -0,0 +1,95 @@
+using System.Collections.Generic;
+using System.Linq;
+using Color_Chan.Discord.Core.Common.API.Params.Application;
+using Color_Chan.Discord.Core.Common.Models.Guild;
+
+namespace Color_Chan.Discord.Commands.Extensions
+{
+    internal static class DiscordGuildApplicationCommandPermissionsExtensions
+    {
+        internal static bool ShouldUpdatePermissions(this List<DiscordBatchEditApplicationCommandPermissions> localCommandPerms, 
+                                                     IReadOnlyList<IDiscordGuildApplicationCommandPermissions> existingPerms)
+        {
+            foreach (var localCommandPerm in localCommandPerms)
+            {
+                var existingCommandPerm = existingPerms.FirstOrDefault(x => x.CommandId.Equals(localCommandPerm.CommandId));
+
+                if (existingCommandPerm is null)
+                {
+                    // New command perms found.
+                    return true;
+                }
+
+                // Found existing perm.
+
+                if (ContainsNewOrUpdatedPerm(localCommandPerm, existingCommandPerm))
+                {
+                    return true;
+                }
+            }
+
+            foreach (var existingPerm in existingPerms)
+            {
+                var localCommandPerm = localCommandPerms.FirstOrDefault(x => x.CommandId.Equals(existingPerm.CommandId));
+
+                if (localCommandPerm is null)
+                {
+                    // Deleted command perms found.
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        private static bool ContainsNewOrUpdatedPerm(DiscordBatchEditApplicationCommandPermissions localCommandPerm, IDiscordGuildApplicationCommandPermissions existingCommandPerm)
+        {
+            if (localCommandPerm.Permissions.Count() != existingCommandPerm.Permissions.Count())
+            {
+                return true;
+            }
+            
+            foreach (var localPerm in localCommandPerm.Permissions)
+            {
+                var existingPerm = existingCommandPerm.Permissions.FirstOrDefault(x => x.Id == localPerm.Id);
+
+                if (existingPerm is null)
+                {
+                    return true;
+                }
+                
+                if (localPerm.Type != existingPerm.Type)
+                {
+                    return true;
+                }
+                
+                if (localPerm.Allow != existingPerm.Allow)
+                {
+                    return true;
+                }
+            }
+            
+            foreach (var existingPerm in existingCommandPerm.Permissions)
+            {
+                var localPerm = localCommandPerm.Permissions.FirstOrDefault(x => x.Id == existingPerm.Id);
+
+                if (localPerm is null)
+                {
+                    return true;
+                }
+                
+                if (existingPerm.Type != localPerm.Type)
+                {
+                    return true;
+                }
+                
+                if (existingPerm.Allow != localPerm.Allow)
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Color-Chan.Discord.Commands/Services/Builders/ISlashCommandGuildBuildService.cs b/src/Color-Chan.Discord.Commands/Services/Builders/ISlashCommandGuildBuildService.cs
index 10b49666..83dd9478 100644
--- a/src/Color-Chan.Discord.Commands/Services/Builders/ISlashCommandGuildBuildService.cs
+++ b/src/Color-Chan.Discord.Commands/Services/Builders/ISlashCommandGuildBuildService.cs
@@ -68,10 +68,10 @@ public interface ISlashCommandGuildBuildService
         /// <summary>
         ///     Builds the <see cref="DiscordBatchEditApplicationCommandPermissions"/> from the <see cref="SlashCommandPermissionAttribute"/> data.
         /// </summary>
-        /// <param name="commandInfos">The <see cref="ISlashCommandInfo"/>s containing the information needed for the <see cref="DiscordBatchEditApplicationCommandPermissions"/>.</param>
+        /// <param name="attributePairs">A dictionary where the <see cref="SlashCommandPermissionAttribute" /> are ordered by the command ID.</param>
         /// <returns>
         ///     The converted <see cref="DiscordBatchEditApplicationCommandPermissions"/>.
         /// </returns>
-        IEnumerable<DiscordBatchEditApplicationCommandPermissions> BuildGuildPermissions(IEnumerable<ISlashCommandInfo> commandInfos);
+        IEnumerable<DiscordBatchEditApplicationCommandPermissions> BuildGuildPermissions(Dictionary<ulong, IEnumerable<SlashCommandPermissionAttribute>> attributePairs);
     }
 }
\ No newline at end of file
diff --git a/src/Color-Chan.Discord.Commands/Services/Implementations/Builders/SlashCommandGuildBuildService.cs b/src/Color-Chan.Discord.Commands/Services/Implementations/Builders/SlashCommandGuildBuildService.cs
index e18ff8e9..7aa79808 100644
--- a/src/Color-Chan.Discord.Commands/Services/Implementations/Builders/SlashCommandGuildBuildService.cs
+++ b/src/Color-Chan.Discord.Commands/Services/Implementations/Builders/SlashCommandGuildBuildService.cs
@@ -3,8 +3,8 @@
 using System.Linq;
 using System.Reflection;
 using Color_Chan.Discord.Commands.Attributes;
-using Color_Chan.Discord.Commands.Info;
 using Color_Chan.Discord.Commands.Services.Builders;
+using Color_Chan.Discord.Core.Common.API.DataModels.Application;
 using Color_Chan.Discord.Core.Common.API.Params.Application;
 using Microsoft.Extensions.Logging;
 
@@ -60,7 +60,7 @@ public IEnumerable<SlashCommandPermissionAttribute> GetCommandGuildPermissions(M
 
             if (!GetCommandGuilds(command).Any() && attributes.Any())
             {
-                _logger.LogWarning("Skipping slash permission for {CommandName}, they can not be used with global commands", command.Name);
+                _logger.LogWarning("Skipping slash command permission for {CommandName}, they can not be used with global commands", command.Name);
                 return new List<SlashCommandPermissionAttribute>();
             }
             
@@ -78,7 +78,7 @@ public IEnumerable<SlashCommandPermissionAttribute> GetCommandGuildPermissions(T
 
             if (!GetCommandGuilds(commandModule).Any() && attributes.Any())
             {
-                _logger.LogWarning("Skipping slash permission for {ModuleName}, they can not be used with global commands", commandModule.Name);
+                _logger.LogWarning("Skipping slash command permission for {ModuleName}, they can not be used with global commands", commandModule.Name);
                 return new List<SlashCommandPermissionAttribute>();
             }
             
@@ -86,9 +86,31 @@ public IEnumerable<SlashCommandPermissionAttribute> GetCommandGuildPermissions(T
         }
 
         /// <inheritdoc />
-        public IEnumerable<DiscordBatchEditApplicationCommandPermissions> BuildGuildPermissions(IEnumerable<ISlashCommandInfo> commandInfos)
+        public IEnumerable<DiscordBatchEditApplicationCommandPermissions> BuildGuildPermissions(Dictionary<ulong, IEnumerable<SlashCommandPermissionAttribute>> attributePairs)
         {
-            throw new NotImplementedException();
+            var permBatch = new List<DiscordBatchEditApplicationCommandPermissions>();
+
+            foreach (var (commandId, attributes) in attributePairs)
+            {
+                var perms = new List<DiscordApplicationCommandPermissionsData>();
+                foreach (var attribute in attributes)
+                {
+                    perms.Add(new DiscordApplicationCommandPermissionsData
+                    {
+                        Allow = true,
+                        Id = attribute.Id,
+                        Type = attribute.Type
+                    });
+                }
+                
+                permBatch.Add(new DiscordBatchEditApplicationCommandPermissions
+                {
+                    CommandId = commandId,
+                    Permissions = perms
+                });
+            }
+
+            return permBatch;
         }
     }
 }
\ No newline at end of file
diff --git a/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandAutoSyncService.cs b/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandAutoSyncService.cs
index a5f8f332..0b82c55a 100644
--- a/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandAutoSyncService.cs
+++ b/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandAutoSyncService.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using Color_Chan.Discord.Commands.Attributes;
 using Color_Chan.Discord.Commands.Configurations;
 using Color_Chan.Discord.Commands.Exceptions;
 using Color_Chan.Discord.Commands.Extensions;
@@ -9,6 +10,7 @@
 using Color_Chan.Discord.Commands.Services.Builders;
 using Color_Chan.Discord.Core;
 using Color_Chan.Discord.Core.Common.API.Rest;
+using Color_Chan.Discord.Core.Common.Models.Application;
 using Color_Chan.Discord.Core.Results;
 using Microsoft.Extensions.Logging;
 
@@ -20,6 +22,7 @@ public class SlashCommandAutoSyncService : ISlashCommandAutoSyncService
         private const int MaxGlobalCommands = 100;
         private const int MaxGuildCommands = 100;
         private readonly ISlashCommandBuildService _commandBuildService;
+        private readonly ISlashCommandGuildBuildService _guildBuildService;
         private readonly DiscordTokens _discordTokens;
         private readonly ILogger<SlashCommandAutoSyncService> _logger;
         private readonly IDiscordRestApplication _restApplication;
@@ -36,10 +39,14 @@ public class SlashCommandAutoSyncService : ISlashCommandAutoSyncService
         ///     The <see cref="ISlashCommandBuildService" /> that will be used to build the slash
         ///     commands parameters.
         /// </param>
+        /// <param name="guildBuildService">
+        ///     The <see cref="ISlashCommandGuildBuildService" /> that will be used to build the guild command permissions.
+        /// </param>
         public SlashCommandAutoSyncService(IDiscordRestApplication restApplication, DiscordTokens discordTokens, ILogger<SlashCommandAutoSyncService> logger,
-                                           ISlashCommandBuildService commandBuildService)
+                                           ISlashCommandBuildService commandBuildService, ISlashCommandGuildBuildService guildBuildService)
         {
             _commandBuildService = commandBuildService;
+            _guildBuildService = guildBuildService;
             _restApplication = restApplication;
             _discordTokens = discordTokens;
             _logger = logger;
@@ -132,8 +139,10 @@ private async Task<Result> UpdateGuildCommandsAsync(IReadOnlyCollection<ISlashCo
 
             foreach (var guildId in guildIds)
             {
+                var remainingCommands = new List<IDiscordApplicationCommand>();
+
                 // Build the slash commands.
-                var guildCommandInfos = GetGuildCommandInfos(slashCommandInfos, guildId);
+                var guildCommandInfos = GetGuildCommandInfos(slashCommandInfos, guildId).ToList();
                 var guildCommands = _commandBuildService.BuildSlashCommandsParams(guildCommandInfos).ToList();
                 if (guildCommands.Count > MaxGuildCommands) throw new UpdateSlashCommandException($"A guild can not have more then {MaxGuildCommands} slash commands.");
 
@@ -153,6 +162,8 @@ private async Task<Result> UpdateGuildCommandsAsync(IReadOnlyCollection<ISlashCo
                         // Creating a new slash command.
                         var result = await _restApplication.CreateGuildApplicationCommandAsync(_discordTokens.ApplicationId, guildId, newCommand).ConfigureAwait(false);
                         if (!result.IsSuccessful) return Result.FromError(existingCommands.ErrorResult ?? new ErrorResult("Failed to create guild slash commands."));
+                        
+                        remainingCommands.Add(result.Entity ?? throw new ArgumentNullException(nameof(result.Entity)));
                         _logger.LogInformation("Created new guild slash command {CommandName} {Id}", result.Entity!.Name, result.Entity!.Id.ToString());
                     }
                     else
@@ -166,6 +177,8 @@ private async Task<Result> UpdateGuildCommandsAsync(IReadOnlyCollection<ISlashCo
                         // Updating a slash command.
                         var result = await _restApplication.EditGuildApplicationCommandAsync(_discordTokens.ApplicationId, guildId, commandId.Value, newCommand).ConfigureAwait(false);
                         if (!result.IsSuccessful) return Result.FromError(existingCommands.ErrorResult ?? new ErrorResult("Failed to create guild slash commands."));
+                        
+                        
                         _logger.LogInformation("Updated existing guild slash command {CommandName} {Id}", result.Entity!.Name, result.Entity!.Id.ToString());
                     }
                 }
@@ -173,16 +186,52 @@ private async Task<Result> UpdateGuildCommandsAsync(IReadOnlyCollection<ISlashCo
                 // Delete old guild guild commands.
                 foreach (var existingCommand in existingCommands.Entity!)
                 {
-                    if (!guildCommands.Select(x => x.Name).Contains(existingCommand.Name))
+                    if (guildCommands.Select(x => x.Name).Contains(existingCommand.Name))
                     {
-                        // Delete old guild slash command.
-                        var result = await _restApplication.DeleteGuildApplicationCommandAsync(_discordTokens.ApplicationId, guildId, existingCommand.Id).ConfigureAwait(false);
-                        if (!result.IsSuccessful) return Result.FromError(existingCommands.ErrorResult ?? new ErrorResult("Failed to delete existing guild slash commands."));
+                        remainingCommands.Add(existingCommand);
+                        continue;
+                    }
+                    
+                    // Delete old guild slash command.
+                    var result = await _restApplication.DeleteGuildApplicationCommandAsync(_discordTokens.ApplicationId, guildId, existingCommand.Id).ConfigureAwait(false);
+                    if (!result.IsSuccessful) return Result.FromError(existingCommands.ErrorResult ?? new ErrorResult("Failed to delete existing guild slash commands."));
+                        
+                    _logger.LogInformation("Deleted old guild slash command {CommandName} {Id}", existingCommand.Name, existingCommand.Id.ToString());
+                }
 
-                        _logger.LogInformation("Deleted old guild slash command {CommandName} {Id}", existingCommand.Name, existingCommand.Id.ToString());
+                // Link local command perms with their command ID.
+                var localCommandPerms = new Dictionary<ulong, IEnumerable<SlashCommandPermissionAttribute>>();
+                foreach (var remainingCommand in remainingCommands)
+                {
+                    var commandInfo = guildCommandInfos.FirstOrDefault(x => x.CommandName == remainingCommand.Name);
+                    if (commandInfo is null) continue;
+
+                    localCommandPerms.Add(remainingCommand.Id, commandInfo.Permissions ?? new List<SlashCommandPermissionAttribute>());
+                }
+
+                // Get the existing command perms.
+                var existingCommandPerms = await _restApplication.GetGuildApplicationCommandPermissions(_discordTokens.ApplicationId, guildId).ConfigureAwait(false);
+                if (!existingCommandPerms.IsSuccessful)
+                {
+                    return Result.FromError(existingCommands.ErrorResult ?? new ErrorResult($"Failed to get existing guild command permissions for guild {guildId.ToString()}"));
+                }
+                
+                // Only update the perms if needed.
+                var batchPerms = _guildBuildService.BuildGuildPermissions(localCommandPerms).ToList();
+                if (batchPerms.ShouldUpdatePermissions(existingCommandPerms.Entity!))
+                {
+                    var batchPermResult = await _restApplication.BatchEditApplicationCommandPermissions(_discordTokens.ApplicationId, guildId, batchPerms).ConfigureAwait(false);
+
+                    if (!batchPermResult.IsSuccessful)
+                    {
+                        return Result.FromError(existingCommands.ErrorResult ?? new ErrorResult($"Failed batch edit guild command permissions for guild {guildId.ToString()}"));
                     }
+                    
+                    _logger.LogInformation("Updated command permissions for guild {GuildId}", guildId.ToString());
                 }
+                
 
+                
                 _logger.LogInformation("Finished syncing guild slash commands for guild {Id}", guildId.ToString());
             }
 
diff --git a/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandService.cs b/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandService.cs
index f9c49c0d..0103e944 100644
--- a/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandService.cs
+++ b/src/Color-Chan.Discord.Commands/Services/Implementations/SlashCommandService.cs
@@ -56,17 +56,21 @@ public SlashCommandService(ILogger<SlashCommandService> logger, ISlashCommandBui
         /// <inheritdoc />
         public async Task AddInteractionCommandsAsync(Assembly assembly)
         {
-            _logger.LogDebug("Loading interaction commands");
+            _logger.LogDebug("Registering slash commands...");
 
             // Build all commands in a specific assembly.
             var commandInfos = _slashCommandBuildService.BuildSlashCommandInfos(assembly);
             foreach (var (key, commandInfo) in commandInfos)
             {
-                if (!_slashCommands.TryAdd(key, commandInfo))
-                    throw new Exception($"Failed to register {commandInfo.CommandName}");
+                if (_slashCommands.TryAdd(key, commandInfo)) continue;
+
+                // The command already existed.
+                var registeringException = new Exception($"Failed to register {commandInfo.CommandName}");
+                _logger.LogError(registeringException, "Can not register multiple commands with the same name");
+                throw registeringException;
             }
 
-            _logger.LogInformation("Finished adding {Count} commands to the command registry", _slashCommands.Count.ToString());
+            _logger.LogInformation("Registered {Count} slash commands to the command registry", _slashCommands.Count.ToString());
 
             // Default config if no config was set.
             _configurations ??= new SlashCommandConfiguration();
diff --git a/src/Color-Chan.Discord.Core/Common/API/Params/Application/DiscordBatchEditApplicationCommandPermissions.cs b/src/Color-Chan.Discord.Core/Common/API/Params/Application/DiscordBatchEditApplicationCommandPermissions.cs
index 8601d53c..a1679f78 100644
--- a/src/Color-Chan.Discord.Core/Common/API/Params/Application/DiscordBatchEditApplicationCommandPermissions.cs
+++ b/src/Color-Chan.Discord.Core/Common/API/Params/Application/DiscordBatchEditApplicationCommandPermissions.cs
@@ -1,6 +1,6 @@
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
-using Color_Chan.Discord.Core.Common.Models.Application;
+using Color_Chan.Discord.Core.Common.API.DataModels.Application;
 
 namespace Color_Chan.Discord.Core.Common.API.Params.Application
 {
@@ -16,6 +16,6 @@ public class DiscordBatchEditApplicationCommandPermissions
         ///     The permissions for the command in the guild.
         /// </summary>
         [JsonPropertyName("permissions")]
-        public IEnumerable<IDiscordApplicationCommandPermissions> Permissions { get; set; } = new List<IDiscordApplicationCommandPermissions>();
+        public IEnumerable<DiscordApplicationCommandPermissionsData> Permissions { get; set; } = new List<DiscordApplicationCommandPermissionsData>();
     }
 }
\ No newline at end of file
diff --git a/tests/Color-Chan.Discord.Commands.Tests/Services/Implementations/SlashCommandRequirementServiceTests.cs b/tests/Color-Chan.Discord.Commands.Tests/Services/Implementations/SlashCommandRequirementServiceTests.cs
index b2e129bf..f3112a2e 100644
--- a/tests/Color-Chan.Discord.Commands.Tests/Services/Implementations/SlashCommandRequirementServiceTests.cs
+++ b/tests/Color-Chan.Discord.Commands.Tests/Services/Implementations/SlashCommandRequirementServiceTests.cs
@@ -30,7 +30,7 @@ public async Task ExecuteSlashCommandRequirementsAsync_should_get_one_error(int
             var module = typeof(ValidMockCommandModule1).GetTypeInfo();
             var method = module.GetMethods()[methodIndex];
             var requirementsAttributes = method.GetCustomAttributes<BoolRequirement>();
-            var commandInfo = new SlashCommandInfo("test", "desc", method, module)
+            var commandInfo = new SlashCommandInfo("test", "desc", false, method, module)
             {
                 Requirements = requirementsAttributes
             };