diff --git a/API-Documentaion.md b/API-Documentaion.md
index 44ae267..5145ecc 100644
--- a/API-Documentaion.md
+++ b/API-Documentaion.md
@@ -1,7 +1,7 @@
 ## API Documentaion
 This section contains all needed infromation to access the TheCitadelofRicks API. It also contains the API specification.
 
-### /courses
+### /course
 /courses returns a Array "courses" of all currently available courses at the HS Offenburg with their name and link to the timetable (current/first week).
 
 ``` json
@@ -91,6 +91,50 @@ Each lesson has the following values:
 
 ```
 
+### /lessonSubjectList?courseName={coursename}&week={week}
+/lessonSubjectList returns a HashSet with all unique lesson subjects of the given course and week.
+``` json
+[
+   "Softw. Engin. 2",
+   "Sem. IT-Anwendungen",
+   "Prakt. Masch.Prog.",
+   "Masch. Programm.",
+   "Datenbanksyst. 2a",
+   "Mathematik 4",
+   "Datenbanksyst. 2b"
+]
+
+```
+
+### /lesson returns a?courseName={coursename}&lessonSubject={lessonsubject}&week={week}
+/lesson returns a ArrayList of Lessons.
+``` json
+[
+   {
+      "lessonID":"0.1.0",
+      "lessonSubject":"Mathematik 4",
+      "lessonTeacher":"Decker E.",
+      "lessonRoom":"B121, B206",
+      "lessonRemark":""
+   },
+   {
+      "lessonID":"0.1.1",
+      "lessonSubject":"Mathematik 4",
+      "lessonTeacher":"Orb",
+      "lessonRoom":"B206, B121",
+      "lessonRemark":""
+   },
+   {
+      "lessonID":"0.2.0",
+      "lessonSubject":"Mathematik 4",
+      "lessonTeacher":"Decker E.",
+      "lessonRoom":"B121, B206",
+      "lessonRemark":""
+   },
+   ...
+]
+```
+
 ### /mensamenu
 /mensamenu returns two Arrays containing this and next weeks mensa menus. The respones contains a Array "days" of the type Meals for each day of the week (Monday to Sunday), meals therefor contains a ArrayList of n meals.