diff --git a/lib/cloudevent.js b/lib/cloudevent.js
index e8acf5f..072e866 100644
--- a/lib/cloudevent.js
+++ b/lib/cloudevent.js
@@ -48,6 +48,26 @@ Cloudevent.prototype.time = function(_time){
   return this;
 }
 
+Cloudevent.prototype.schemaurl = function(_schemaurl) {
+  this.spec.schemaurl(_schemaurl);
+  return this;
+}
+
+Cloudevent.prototype.contenttype = function(_contenttype){
+  this.spec.contenttype(_contenttype);
+  return this;
+}
+
+Cloudevent.prototype.data = function(_data) {
+  this.spec.data(_data);
+  return this;
+}
+
+Cloudevent.prototype.addExtension = function(key, value){
+  this.spec.addExtension(key, value);
+  return this;
+}
+
 /*
  * Export the specs
  */