diff --git a/scnserver/logic/application.go b/scnserver/logic/application.go
index ab6026a..b64f344 100644
--- a/scnserver/logic/application.go
+++ b/scnserver/logic/application.go
@@ -239,15 +239,23 @@ func (app *Application) StartRequest(g *gin.Context, uri any, query any, body an
 		}
 	}
 
-	if body != nil && g.ContentType() == "application/json" {
-		if err := g.ShouldBindJSON(body); err != nil {
-			return nil, langext.Ptr(ginresp.APIError(g, 400, apierr.BINDFAIL_BODY_PARAM, "Failed to read body", err))
+	if body != nil {
+		if g.ContentType() == "application/json" {
+			if err := g.ShouldBindJSON(body); err != nil {
+				return nil, langext.Ptr(ginresp.APIError(g, apierr.BindFailJSON, "Failed to read body", err))
+			}	
+		} else {
+			return nil, langext.Ptr(ginresp.APIError(g, apierr.BindFailJSON, "missing JSON body", nil))
 		}
 	}
 
-	if form != nil && g.ContentType() == "multipart/form-data" {
-		if err := g.ShouldBindWith(form, binding.Form); err != nil {
-			return nil, langext.Ptr(ginresp.APIError(g, 400, apierr.BINDFAIL_BODY_PARAM, "Failed to read multipart-form", err))
+	if form != nil {
+		if  g.ContentType() == "multipart/form-data" {
+			if err := g.ShouldBindWith(form, binding.Form); err != nil {
+				return nil, langext.Ptr(ginresp.APIError(g, apierr.BindFailFormData, "Failed to read multipart-form", err))
+			}	
+		} else {
+			return nil, langext.Ptr(ginresp.APIError(g, apierr.BindFailJSON, "missing form body", nil))
 		}
 	}