2 files changed, 21 insertions, 2 deletions

diff --git a/recipes/github/index.js b/recipes/github/index.js
index 23607bd..dfcd7d1 100644
--- a/recipes/github/index.js
+++ b/recipes/github/index.js
@@ -1 +1,19 @@
-module.exports = Ferdi => Ferdi;
+module.exports = Ferdi => class GitHub extends Ferdi {
+  async validateUrl(url) {
+    try {
+      const resp = await window.fetch(`${url}/api/v3`, {
+        method: 'GET',
+        headers: {
+          'Content-Type': 'application/json',
+          Accept: 'application/vnd.github.v3+json',
+        },
+      });
+      // doc: https://developer.github.com/enterprise/2.17/v3/#current-version
+      return resp.status.toString().startsWith('2');
+    } catch (err) {
+      console.error(err);
+    }
+
+    return false;
+  }
+};
diff --git a/recipes/github/package.json b/recipes/github/package.json
index 2ed611e..573f743 100644
--- a/recipes/github/package.json
+++ b/recipes/github/package.json
@@ -1,10 +1,11 @@
 {
   "id": "github",
   "name": "GitHub",
-  "version": "2.1.1",
+  "version": "2.2.0",
   "license": "MIT",
   "config": {
     "serviceURL": "https://github.com/notifications",
+    "hasCustomUrl": true,
     "hasIndirectMessages": true
   }
 }