diff --git a/oauth3.domains.js b/oauth3.domains.js
index 280f16c..17d0e79 100644
--- a/oauth3.domains.js
+++ b/oauth3.domains.js
@@ -3,6 +3,21 @@
 
 var OAUTH3 = exports.OAUTH3 = exports.OAUTH3 || require('./oauth3.core.js').OAUTH3;
 
+OAUTH3.api['domains.checkAvailability'] = function (providerUri, opts) {
+  var session = opts.session;
+  var sld = opts.sld;
+  var tld = opts.tld;
+
+  return OAUTH3.request({
+    method: 'GET'
+  , url: OAUTH3.url.normalize(providerUri)
+      + '/api/com.daplie.domains/check-availability/' + sld + '/' + tld
+  , session: session
+  }).then(function (res) {
+    return res;
+  });
+};
+
 OAUTH3.api['domains.list'] = function (providerUri, opts) {
   var session = opts.session;