diff --git a/lib/api/add.ts b/lib/api/add.ts
index 0b598f7..bf9f0bd 100644
--- a/lib/api/add.ts
+++ b/lib/api/add.ts
@@ -3,8 +3,18 @@ import axios from 'axios'
 
 import dbConnect from '../dbConnect'
 import URLModel from '../schema'
+import blacklist from './blacklist.json'
 
 export default async function addURL(url: string, response: VercelResponse) {
+  blacklist.forEach(b=> {
+    if (url.includes(b)) {
+      return response.status(400).json({
+        success: false,
+        message: 'URL in on blacklist'
+      })
+    }
+  })
+
   // fetch url (e.g. check domain exist)
   try {
     await axios.get(url)
diff --git a/lib/api/blacklist.json b/lib/api/blacklist.json
new file mode 100644
index 0000000..c152cc4
--- /dev/null
+++ b/lib/api/blacklist.json
@@ -0,0 +1,20 @@
+[
+  "google.com",
+  "google.co",
+  "google.pl",
+  "google.tk",
+  "google.de",
+  "google.cf",
+  "google.bz",
+  "youtube.com",
+  "youtu.be",
+  "twitter.com",
+  "duckduckgo.com",
+  "stackoverflow.com",
+  "github.com",
+  "gitlab.com",
+  "reddit.com",
+  "domains.google",
+  "pingbot.cf",
+  "magicuser.cf"
+]