diff --git a/api/apps/apps.py b/api/apps/apps.py
new file mode 100644
index 0000000..da3a787
--- /dev/null
+++ b/api/apps/apps.py
@@ -0,0 +1,21 @@
+from core.rest_client import RestClient
+from api.apps.installactions import Installation
+
+
+class Apps(RestClient):
+    def __init__(self, api_root_url, **kwargs):
+        super(Apps, self).__init__(api_root_url, **kwargs)
+        self.installaction = Installation(self.api_root_url, **kwargs)
+
+    def create_gitHub_app_from_a_manifest(self, code, **kwargs):
+        """
+        https://developer.github.com/v3/apps/#create-a-github-app-from-a-manifest
+        """
+        return self.post("/app-manifests/{}/conversions".format(code), **kwargs)
+
+    def get_a_user_installation(self, username, **kwargs):
+        """
+        https://developer.github.com/v3/apps/#get-a-user-installation
+        """
+        headers = {'Accept': 'application/vnd.github.machine-man-preview+json'}
+        return self.get("/users/{}/installation".format(username), headers=headers, **kwargs)
diff --git a/api/apps/installactions.py b/api/apps/installactions.py
new file mode 100644
index 0000000..a039858
--- /dev/null
+++ b/api/apps/installactions.py
@@ -0,0 +1,29 @@
+from core.rest_client import RestClient
+
+
+class Installation(RestClient):
+    def list_repositories(self, **kwargs):
+        """
+        https://developer.github.com/v3/apps/installations/#list-repositories
+        :param kwargs:
+        :return:
+        """
+        headers = {'Accept': 'application/vnd.github.machine-man-preview+json'}
+        return self.get("/installation/repositories", headers=headers, **kwargs)
+
+    def list_installations_for_a_user(self, **kwargs):
+        """
+        https://developer.github.com/v3/apps/installations/#list-installations-for-a-user
+        :param kwargs:
+        :return:
+        """
+        headers = {'Accept': 'application/vnd.github.machine-man-preview+json'}
+        return self.get("/user/installations", headers=headers, **kwargs)
+
+    def add_repository_to_installation(self, installation_id, repository_id, **kwargs):
+        """
+        https://developer.github.com/v3/apps/installations/#add-repository-to-installation
+        """
+        headers = {'Accept': 'application/vnd.github.machine-man-preview+json'}
+        return self.put("/user/installations/{}/repositories/{}".format(installation_id, repository_id), headers = headers, **kwargs)
+
diff --git a/api/issues/issues.py b/api/issues/issues.py
index 892e955..59470de 100644
--- a/api/issues/issues.py
+++ b/api/issues/issues.py
@@ -8,3 +8,12 @@ def create_issue(self, owner, repo, **kwargs):
         https://developer.github.com/v3/issues/#create-an-issue
         """
         return self.post("/repos/{}/{}/issues".format(owner, repo), **kwargs)
+
+    def list_issue(self, **kwargs):
+        """
+        https://developer.github.com/v3/issues/#list-issues
+        """
+        header = {'Accept': 'application/vnd.github.machine-man-preview'}
+        return self.get("/issues", headers=header, **kwargs)
+
+
diff --git a/api/repositories/repositories.py b/api/repositories/repositories.py
index 31c735e..ce09f96 100644
--- a/api/repositories/repositories.py
+++ b/api/repositories/repositories.py
@@ -40,6 +40,12 @@ def transfer_a_repository(self, owner, repo, **kwargs):
         headers = {'Accept':'application/vnd.github.nightshade-preview+json'}
         return self.delete('/repos/{}/{}/transfer'.format(owner, repo), headers = headers ,**kwargs)
 
+    def list_teams(self, owner, repo, **kwargs):
+        """
+        https://developer.github.com/v3/repos/#list-teams
+        """
+        return self.get("/repos/{}/{}/teams".format(owner, repo), **kwargs)
+
 
 
 
diff --git a/github.py b/github.py
index edb7c1c..d64abc3 100644
--- a/github.py
+++ b/github.py
@@ -2,7 +2,7 @@
 from api.issues.issues import Issues
 from api.checks.checks import Checks
 from api.interactions.interactions import Interactions
-
+from api.apps.apps import Apps
 
 class Github():
     def __init__(self, **kwargs):
@@ -11,3 +11,5 @@ def __init__(self, **kwargs):
         self.issues = Issues(self.api_root_url, **kwargs)
         self.checks = Checks(self.api_root_url, **kwargs)
         self.interactions = Interactions(self.api_root_url, **kwargs)
+        self.apps = Apps(self.api_root_url, **kwargs)
+