diff --git a/shadow-cljs.edn b/shadow-cljs.edn
index 19e4f0f..c040ea1 100644
--- a/shadow-cljs.edn
+++ b/shadow-cljs.edn
@@ -5,7 +5,7 @@
   "src/test"]
 
  :dependencies
- []
+ [[orchestra "2018.12.06-2"]]
  :dev-http {8080 "public"}
  :builds
  {:test
diff --git a/src/main/dda/masto_embed/api.cljs b/src/main/dda/masto_embed/api.cljs
new file mode 100644
index 0000000..85c6563
--- /dev/null
+++ b/src/main/dda/masto_embed/api.cljs
@@ -0,0 +1,54 @@
+; Licensed to the Apache Software Foundation (ASF) under one
+; or more contributor license agreements. See the NOTICE file
+; distributed with this work for additional information
+; regarding copyright ownership. The ASF licenses this file
+; to you under the Apache License, Version 2.0 (the
+; "License"); you may not use this file except in compliance
+; with the License. You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+(ns dda.masto-embed.api
+  (:require
+   ["mastodon-api" :as Mastodon]
+   [clojure.spec.alpha :as s]
+   [clojure.spec.test.alpha :as st]
+   [orchestra.core :refer-macros [defn-spec]]
+   [clojure.pprint :as pprint :refer [pprint]]
+   [cljs.core.async :refer [go]]
+   [cljs.core.async.interop :refer-macros [<p!]]))
+
+(s/def ::account-id string?)
+(s/def ::host-url string?)
+
+(defn-spec create-config map?
+  [account-id ::account-id
+   host-url ::host-url]
+  {:access_token "unused"
+   :account-id account-id
+   :api_url (str host-url "/api/v1/") })
+
+(defn exit-with-error [error]
+  (js/console.error error)
+  (js/process.exit 1))
+
+(defn js->edn [data]
+  (js->clj data :keywordize-keys true))
+
+(defn mastodon-client [mastodon-config]
+  (or (some-> mastodon-config clj->js Mastodon.)
+      (exit-with-error "missing Mastodon client configuration!")))
+
+(defn get-mastodon-timeline [mastodon-config callback]
+  (.then (.get (mastodon-client mastodon-config) 
+               (str "accounts/" (:account-id mastodon-config) "/statuses") 
+               #js {})
+         #(let [response (-> % .-data js->edn)]
+            (if-let [error (:error response)]
+              (exit-with-error error)
+              (callback response)))))
\ No newline at end of file
diff --git a/src/main/dda/masto_embed/app.cljs b/src/main/dda/masto_embed/app.cljs
index 1bdf1ab..f5b9240 100644
--- a/src/main/dda/masto_embed/app.cljs
+++ b/src/main/dda/masto_embed/app.cljs
@@ -1,53 +1,25 @@
+; Licensed to the Apache Software Foundation (ASF) under one
+; or more contributor license agreements. See the NOTICE file
+; distributed with this work for additional information
+; regarding copyright ownership. The ASF licenses this file
+; to you under the Apache License, Version 2.0 (the
+; "License"); you may not use this file except in compliance
+; with the License. You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
 (ns dda.masto-embed.app
   (:require
-   ["mastodon-api" :as Mastodon]
-   [clojure.pprint :as pprint :refer [pprint]]
-   [cljs.core.async :refer [go]]
-   [cljs.core.async.interop :refer-macros [<p!]]))
-
-(defn get-content-seq [response]
-  (map
-   #(aget % "content")
-   (array-seq
-    (aget response "data"))))
-
-(defn luccas-fn []
-  (let [config (js-obj "api_url" "https://social.meissa-gmbh.de/api/v1/" "access_token" "...")
-        masto (new Mastodon config)
-        rest-endpoint "accounts/:id/statuses"
-        id-config (js-obj "id" "2")
-        result (go
-                 (let [response (<p! (.get masto rest-endpoint id-config))]
-                   (get-content-seq response)))]
-    (pprint result)
-    result))
-
-(defn add-one [a]
-  (+ a 1))
-
-;from yogthos / mastodon-bot
-
-(defn exit-with-error [error]
-  (js/console.error error)
-  (js/process.exit 1))
-
-(defn js->edn [data]
-  (js->clj data :keywordize-keys true))
+   [dda.masto-embed.api :as api]
+   [clojure.pprint :as pprint :refer [pprint]]))
 
 (def mastodon-config 
-  {:access_token "XXXX"
-   :account-id "2"
-   :api_url "https://social.meissa-gmbh.de/api/v1/"})
-
-(def mastodon-client (or (some-> mastodon-config clj->js Mastodon.)
-                         (exit-with-error "missing Mastodon client configuration!")))
-
-(defn get-mastodon-timeline [callback]
-  (.then (.get mastodon-client (str "accounts/" (:account-id mastodon-config) "/statuses") #js {})
-         #(let [response (-> % .-data js->edn)]
-            (if-let [error (:error response)]
-              (exit-with-error error)
-              (callback response)))))
+  (api/create-config "2" "https://social.meissa-gmbh.de"))
 
 (defn render-to-document
   [input]
@@ -57,4 +29,4 @@
       (set! input)))
 
 (defn init []
-  (get-mastodon-timeline render-to-document))
\ No newline at end of file
+  (api/get-mastodon-timeline mastodon-config render-to-document))
\ No newline at end of file
diff --git a/src/main/dda/masto_embed/js_api.cljs b/src/main/dda/masto_embed/js_api.cljs
new file mode 100644
index 0000000..84559fe
--- /dev/null
+++ b/src/main/dda/masto_embed/js_api.cljs
@@ -0,0 +1,38 @@
+; Licensed to the Apache Software Foundation (ASF) under one
+; or more contributor license agreements. See the NOTICE file
+; distributed with this work for additional information
+; regarding copyright ownership. The ASF licenses this file
+; to you under the Apache License, Version 2.0 (the
+; "License"); you may not use this file except in compliance
+; with the License. You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+(ns dda.masto-embed.js-api
+  (:require
+   ["mastodon-api" :as Mastodon]
+   [clojure.pprint :as pprint :refer [pprint]]
+   [cljs.core.async :refer [go]]
+   [cljs.core.async.interop :refer-macros [<p!]]))
+
+(defn get-content-seq [response]
+  (map
+   #(aget % "content")
+   (array-seq
+    (aget response "data"))))
+
+(defn luccas-fn []
+  (let [config (js-obj "api_url" "https://social.meissa-gmbh.de/api/v1/" "access_token" "...")
+        masto (new Mastodon config)
+        rest-endpoint "accounts/:id/statuses"
+        id-config (js-obj "id" "2")
+        result (go
+                 (let [response (<p! (.get masto rest-endpoint id-config))]
+                   (get-content-seq response)))]
+    (pprint result)
+    result))
diff --git a/src/test/dda/masto_embed/app_test.cljs b/src/test/dda/masto_embed/app_test.cljs
index dcd6033..f2aef8b 100644
--- a/src/test/dda/masto_embed/app_test.cljs
+++ b/src/test/dda/masto_embed/app_test.cljs
@@ -1,8 +1,20 @@
+; Licensed to the Apache Software Foundation (ASF) under one
+; or more contributor license agreements. See the NOTICE file
+; distributed with this work for additional information
+; regarding copyright ownership. The ASF licenses this file
+; to you under the Apache License, Version 2.0 (the
+; "License"); you may not use this file except in compliance
+; with the License. You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
 (ns dda.masto-embed.app-test
   (:require 
     [cljs.test :refer (deftest is)]
     [dda.masto-embed.app :as sut]))
-
-(deftest a-failing-test
-  (is (= 3
-         (sut/add-one 2))))
\ No newline at end of file