diff --git a/src/api.ps b/src/api.ps
--- a/src/api.ps
+++ b/src/api.ps
@@ -36,14 +36,14 @@
 (defm (root api base64-to-state) (data)
   (setf (root state-stash) (decode-u-r-i-component (atob data)))
   (let ((data (*j-s-o-n.parse (root state-stash))))
-    (api-call clear-id :qsp-main)
-    (api-call clear-id :qsp-stat)
-    (api-call clear-act)
+    (this.clear-id :qsp-main)
+    (this.clear-id :qsp-stat)
+    (this.clear-act)
     (setf (root vars) (ps:@ data vars))
     (setf (root objs) (ps:@ data objs))
     (setf (root current-location) (ps:@ data next-location))
     (funcall (root locs (root current-location)))
-    (api-call update-objs)
+    (this.update-objs)
     (values)))
 
 ;;; Misc
@@ -92,23 +92,23 @@
     (t (report-error "Internal error!"))))
 
 (defm (root api get-frame) (key)
-  (document.get-element-by-id (api-call key-to-id key)))
+  (document.get-element-by-id (this.key-to-id key)))
 
 (defm (root api add-text) (key text)
-  (api-call append-id (api-call key-to-id key) text))
+  (this.append-id (this.key-to-id key) text))
 
 (defm (root api get-text) (key)
-  (api-call get-id (api-call key-to-id key)))
+  (this.get-id (this.key-to-id key)))
 
 (defm (root api clear-text) (key)
-  (api-call clear-id (api-call key-to-id key)))
+  (this.clear-id (this.key-to-id key)))
 
 (defm (root api newline) (key)
-  (let ((div (api-call get-frame key)))
+  (let ((div (this.get-frame key)))
     (ps:chain div (append-child (document.create-element "br")))))
 
 (defm (root api enable-frame) (key enable)
-  (let ((clss (ps:getprop (api-call get-frame key) 'class-list)))
+  (let ((clss (ps:getprop (this.get-frame key) 'class-list)))
     (setf clss.style.display (if enable "block" "none"))
     (values)))
 
@@ -117,22 +117,22 @@
 (defm (root api add-act) (title img act)
   (setf (ps:getprop (root acts) title)
         (ps:create :img img :act act))
-  (api-call update-acts))
+  (this.update-acts))
 
 (defm (root api del-act) (title)
   (delete (ps:getprop (root acts) title))
-  (api-call update-acts))
+  (this.update-acts))
 
 (defm (root api clear-act) ()
   (setf (root acts) (ps:create))
-  (api-call clear-id "qsp-acts"))
+  (this.clear-id "qsp-acts"))
 
 (defm (root api update-acts) ()
-  (api-call clear-id "qsp-acts")
+  (this.clear-id "qsp-acts")
   (ps:for-in (title (root acts))
     (let ((obj (ps:getprop (root acts) title)))
-      (api-call append-id "qsp-acts"
-                (api-call make-act-html title (ps:getprop obj :img))))))
+      (this.append-id "qsp-acts"
+                (this.make-act-html title (ps:getprop obj :img))))))
 
 ;;; Variables
 
@@ -147,7 +147,7 @@
       name))
 
 (defm (root api ensure-var) (name index)
-  (let ((store (api-call var-ref name)))
+  (let ((store (this.var-ref name)))
     (unless store
       (setf store (ps:create))
       (setf (ps:getprop (root vars) name) store)))
@@ -156,8 +156,8 @@
   (values))
 
 (defm (root api var-ref) (name)
-  (let ((var-name (api-call var-real-name name))
-        (local-store (api-call current-local-frame)))
+  (let ((var-name (this.var-real-name name))
+        (local-store (this.current-local-frame)))
     (cond ((in var-name local-store)
            (ps:getprop local-store))
           ((in var-name (root vars))
@@ -165,19 +165,14 @@
           (t nil))))
 
 (defm (root api get-var) (name index)
-  (let ((store (var-ref name)))
-    (if store
-        (if (in index store)
-            (ps:getprop store index (api-call var-slot name))
-            (report-error (+ "Non-existing index: " name "[" index "]")))
-        (report-error (+ "Unknown variable: " name)))))
+  (this.ensure-var name index)
+  (let ((store (this.var-ref name)))
+    (ps:getprop store index (this.var-slot name))))
 
 (defm (root api set-var) (name index value)
-  (let ((store (var-ref name)))
-    (api-call ensure-var var-name index)
-    (setf (ps:getprop store index
-                      (api-call var-slot name))
-          value)
+  (this.ensure-var name index)
+  (let ((store (this.var-ref name)))
+    (setf (ps:getprop store index (this.var-slot name)) value)
     (values)))
 
 (defm (root api get-array) (name)
@@ -193,7 +188,7 @@
   (values))
 
 (defm (root api array-size) (name)
-  (ps:getprop (root vars) (api-call var-real-name name) 'length))
+  (ps:getprop (root vars) (this.var-real-name name) 'length))
 
 ;;; Objects
 
@@ -212,7 +207,7 @@
     (setf elt.inner-h-t-m-l "")
     (loop :for item :in menu-data
        :do (incf i)
-       :do (incf elt.inner-h-t-m-l (api-call make-menu-item-html i item.text item.icon item.loc)))
+       :do (incf elt.inner-h-t-m-l (this.make-menu-item-html i item.text item.icon item.loc)))
     (setf elt.style.display "block")))
 
 ;;; Content
@@ -235,7 +230,7 @@
   (elt (root locals) (1- (length (root locals)))))
 
 (defm (root api new-local) (name)
-  (let ((frame (api-call current-local-frame))
-        (var-name (api-call var-real-name name)))
+  (let ((frame (this.current-local-frame))
+        (var-name (this.var-real-name name)))
     (unless (in var-name frame)
       (setf (ps:getprop frame var-name) (ps:create)))))