diff --git a/src/routes/index.ts b/src/routes/index.ts
index e071caf7..6834a95d 100644
--- a/src/routes/index.ts
+++ b/src/routes/index.ts
@@ -41,20 +41,30 @@ router.get('/:type*/all', async (ctx) => {
 
     ctx.body = entityObjects.filter((entity) => {
       if (!entity) return;
-
       for (const key of Object.keys(params)) {
-        const value = entity[key];
-
-        switch (typeof value) {
-          case 'string':
-            if (!value.includes(params[key] as string)) return false;
-            break;
-          default:
-            if (value != params[key]) return false;
-            break;
+        let negativeFilter = key.endsWith('!');
+        const value = entity[key.replace('!', '')];
+        if (negativeFilter) {
+          switch (typeof value) {
+            case 'string':
+              if (value.includes(params[key] as string)) return false;
+              break;
+            default:
+              console.log(value, params[key]);
+              if (value == params[key]) return false;
+              break;
+          }
+        } else {
+          switch (typeof value) {
+            case 'string':
+              if (!value.includes(params[key] as string)) return false;
+              break;
+            default:
+              if (value != params[key]) return false;
+              break;
+          }
         }
       }
-
       return true;
     });
   } catch (e) {