diff --git a/src/ReC.Application/Common/Validations/InsertObjectProcedureValidator.cs b/src/ReC.Application/Common/Validations/InsertObjectProcedureValidator.cs
new file mode 100644
index 0000000..6593e04
--- /dev/null
+++ b/src/ReC.Application/Common/Validations/InsertObjectProcedureValidator.cs
@@ -0,0 +1,87 @@
+using FluentValidation;
+using ReC.Application.Common.Procedures;
+
+namespace ReC.Application.Common.Validations;
+
+public class InsertObjectProcedureValidator : AbstractValidator<InsertObjectProcedure>
+{
+    public InsertObjectProcedureValidator()
+    {
+        // ENTITY must be one of the allowed values
+        RuleFor(x => x.Entity)
+            .NotEmpty()
+            .Must(e => e is "ACTION" or "ENDPOINT" or "ENDPOINT_AUTH" or "ENDPOINT_PARAMS" or "PROFILE" or "RESULT")
+            .WithMessage("ENTITY must be one of: ACTION, ENDPOINT, ENDPOINT_AUTH, ENDPOINT_PARAMS, PROFILE, RESULT.");
+
+        // ACTION validation
+        When(x => x.Entity == "ACTION", () =>
+        {
+            RuleFor(x => x.ActionProfileId)
+                .NotNull()
+                .WithMessage("ACTION requires ActionProfileId (maps to @pACTION_PROFILE_ID).");
+
+            RuleFor(x => x.ActionEndpointId)
+                .NotNull()
+                .WithMessage("ACTION requires ActionEndpointId (maps to @pACTION_ENDPOINT_ID).");
+        });
+
+        // ENDPOINT validation
+        When(x => x.Entity == "ENDPOINT", () =>
+        {
+            RuleFor(x => x.EndpointUri)
+                .NotEmpty()
+                .WithMessage("ENDPOINT requires EndpointUri (maps to @pENDPOINT_URI).")
+                .MaximumLength(2000);
+        });
+
+        // PROFILE validation
+        When(x => x.Entity == "PROFILE", () =>
+        {
+            RuleFor(x => x.ProfileName)
+                .NotEmpty()
+                .WithMessage("PROFILE requires ProfileName (maps to @pPROFILE_NAME).")
+                .MaximumLength(50);
+
+            RuleFor(x => x.ProfileMandantor)
+                .MaximumLength(50)
+                .When(x => x.ProfileMandantor != null);
+
+            RuleFor(x => x.ProfileDescription)
+                .MaximumLength(250)
+                .When(x => x.ProfileDescription != null);
+        });
+
+        // RESULT validation
+        When(x => x.Entity == "RESULT", () =>
+        {
+            RuleFor(x => x.ResultActionId)
+                .NotNull()
+                .WithMessage("RESULT requires ResultActionId (maps to @pRESULT_ACTION_ID).");
+
+            RuleFor(x => x.ResultStatusId)
+                .NotNull()
+                .WithMessage("RESULT requires ResultStatusId (maps to @pRESULT_STATUS_ID).");
+        });
+
+        // ENDPOINT_PARAMS validation
+        When(x => x.Entity == "ENDPOINT_PARAMS", () =>
+        {
+            RuleFor(x => x.EndpointParamsGroupId)
+                .NotNull()
+                .WithMessage("ENDPOINT_PARAMS requires EndpointParamsGroupId (maps to @pENDPOINT_PARAMS_GROUP_ID).");
+        });
+
+        // Simple length guards for some string fields (optional but cheap)
+        RuleFor(x => x.AddedWho)
+            .MaximumLength(50)
+            .When(x => x.AddedWho != null);
+
+        RuleFor(x => x.EndpointDescription)
+            .MaximumLength(250)
+            .When(x => x.EndpointDescription != null);
+
+        RuleFor(x => x.EndpointAuthDescription)
+            .MaximumLength(250)
+            .When(x => x.EndpointAuthDescription != null);
+    }
+}
\ No newline at end of file