diff --git a/src/gui/client/main-window.lisp b/src/gui/client/main-window.lisp
index ca3b5e4..e655b6d 100644
--- a/src/gui/client/main-window.lisp
+++ b/src/gui/client/main-window.lisp
@@ -263,7 +263,6 @@
         (gui:grid main-frame 0 0 :sticky :nswe)
         (gui-goodies:gui-resize-grid-all gui:*tk*)))))
 
-
 ;; (let ((test-iri "gemini://omg.pebcak.club/"))
 ;;   (slurp-gemini-stream test-iri
 ;;                        :process-function (lambda (lines) (misc:dbg "lines ~a" lines))))))))
diff --git a/src/gui/server/public-api-gemini-stream.lisp b/src/gui/server/public-api-gemini-stream.lisp
index 755a5ab..bdbfa0e 100644
--- a/src/gui/server/public-api-gemini-stream.lisp
+++ b/src/gui/server/public-api-gemini-stream.lisp
@@ -17,9 +17,29 @@
 
 (in-package :json-rpc-communication)
 
+(defclass iri-complete-response (box) ())
+
+(defmethod yason:encode ((object iri-complete-response) &optional (stream *standard-output*))
+  (let ((json:*symbol-encoder* #'json:encode-symbol-as-lowercase)
+        (yason:*list-encoder* #'yason:encode-plist)
+        (json:*symbol-key-encoder* #'json:encode-symbol-as-lowercase))
+    (yason:with-output (stream)
+      (yason:with-object ()
+        (yason:with-object-element (:matches)
+          (yason:encode-array-elements (list->array (getf (unbox object) :matches))))
+        (yason:with-object-element (:indices)
+          (json:with-array ()
+            (loop for indices-group in (getf (unbox object) :indices) do
+              (yason:encode-array-elements (list->array (remove-if #'null indices-group))))))))))
+
 (defun complete-net-address (hint)
   (let ((prompt (ui:open-url-prompt)))
-    (funcall (complete:make-complete-gemini-iri-fn prompt) hint)))
+    (multiple-value-bind (matched-strings x indices)
+        (funcall (complete:make-complete-gemini-iri-fn prompt) hint)
+      (declare (ignore x))
+      (make-instance 'iri-complete-response
+                     :contents (list :matches matched-strings
+                                     :indices indices)))))
 
 (defun request-success-dispatched-fn (status code-description meta response socket iri parsed-iri)
   (declare (ignore iri))