diff --git a/backend/env.example b/backend/env.example
index d41371f..84e5420 100644
--- a/backend/env.example
+++ b/backend/env.example
@@ -94,6 +94,19 @@ DEBUG=true
 # Site URL (for email links, password reset, etc.)
 SITE_URL=http://localhost:3000
 
+# =================================
+# OAuth (Optional)
+# =================================
+# Google OAuth (https://console.cloud.google.com/apis/credentials)
+GOOGLE_CLIENT_ID=your-google-client-id
+GOOGLE_CLIENT_SECRET=your-google-client-secret
+GOOGLE_REDIRECT_URI=https://yourdomain.com/api/v1/oauth/google/callback
+
+# GitHub OAuth (https://github.com/settings/developers)
+GITHUB_CLIENT_ID=your-github-client-id
+GITHUB_CLIENT_SECRET=your-github-client-secret
+GITHUB_REDIRECT_URI=https://yourdomain.com/api/v1/oauth/github/callback
+
 # =================================
 # Rate Limiting
 # =================================