diff --git a/source/backend.py b/source/backend.py
index cee588d..ce554d0 100644
--- a/source/backend.py
+++ b/source/backend.py
@@ -158,27 +158,6 @@ def backend_api_call_member_read(
 	)
 	
 
-def backend_api_call_member_project(
-	membership_number : _typing.Optional[str],
-	name_real_value : str,
-	email_address_private : _typing.Optional[str],
-	groups : list[str],
-	notification_target_url_template : _typing.Optional[str]
-):
-	return backend_api_call_wrapped(
-		True,
-		"POST",
-		"/member/project",
-		{
-			"membership_number": membership_number,
-			"name_real_value": name_real_value,
-			"email_address_private": email_address_private,
-			"groups": groups,
-			"notification_target_url_template": notification_target_url_template,
-		}
-	)
-	
-
 def backend_api_call_member_delete(
 	member_id : int
 ):
@@ -189,3 +168,45 @@ def backend_api_call_member_delete(
 		None
 	)
 	
+
+def backend_api_call_invitation_create(
+	name_changeable,
+	name_value,
+	label_changeable,
+	label_value,
+	email_address_changeable,
+	email_address_value,
+	groups_changeable,
+	groups_value,
+	expiry
+):
+	print({
+		"name_changeable": name_changeable,
+		"name_value": name_value,
+		"label_changeable": label_changeable,
+		"label_value": label_value,
+		"email_address_changeable": email_address_changeable,
+		"email_address_value": email_address_value,
+		"groups_changeable": groups_changeable,
+		"groups_value": groups_value,
+		"expiry": expiry,
+	})
+	return None
+	return backend_api_call_wrapped(
+		True,
+		"POST",
+		"/invitation/create",
+		{
+			"name_changeable": name_changeable,
+			"name_value": name_value,
+			"label_changeable": label_changeable,
+			"label_value": label_value,
+			"email_address_changeable": email_address_changeable,
+			"email_address_value": email_address_value,
+			"groups_changeable": groups_changeable,
+			"groups_value": groups_value,
+			"expiry": expiry,
+		}
+	)
+	
+	
diff --git a/source/main.py b/source/main.py
index 4c4ad29..daf5dba 100644
--- a/source/main.py
+++ b/source/main.py
@@ -26,11 +26,11 @@ def main():
 			"conf-expose",
 			"member-list",
 			"member-read",
-			"member-project",
 			"member-delete",
+			"invite",
 		],
 		metavar = "<action>",
-		help = "auszuführende Aktion; Optionen: 'conf-schema' : JSON-Schema der Konfiguration ausgeben | 'conf-expose' : vervollständigte Konfiguration ausgegeben | 'member-list' : Liste der Mitglieder ausgeben | 'member-read' : Daten eines Mitglieds ausgeben | 'member-project' : ein Mitglied anlegen und die ID des erzeugten Datensatzes ausgeben | 'member-delete' : einer Mitglieder-Datensatz löschen",
+		help = "auszuführende Aktion; Optionen: 'conf-schema' : JSON-Schema der Konfiguration ausgeben | 'conf-expose' : vervollständigte Konfiguration ausgegeben | 'member-list' : Liste der Mitglieder ausgeben | 'member-read' : Daten eines Mitglieds ausgeben | 'member-delete' : einer Mitglieder-Datensatz löschen | 'invite' : Einladung erstellen",
 	)
 	argument_parser.add_argument(
 		"-c",
@@ -51,13 +51,10 @@ def main():
 		help = "ID des Mitglieds",
 	)
 	argument_parser.add_argument(
-		"-m",
-		"--membership-number",
-		type = str,
-		dest = "membership_number",
-		default = None,
-		metavar = "<membership-number>",
-		help = "Mitglieds-Nummer des Mitglieds",
+		"-N",
+		"--fixed-name",
+		dest = "fixed_name",
+		action = 'store_true',
 	)
 	argument_parser.add_argument(
 		"-n",
@@ -66,7 +63,28 @@ def main():
 		dest = "name",
 		default = None,
 		metavar = "<name>",
-		help = "Name des Mitglieds; Leerzeichen sind durch '_' zu ersetzen",
+		help = "Anmelde-Name des Mitglieds; Leerzeichen sind durch '_' zu ersetzen",
+	)
+	argument_parser.add_argument(
+		"-L",
+		"--fixed-label",
+		dest = "fixed_label",
+		action = 'store_true',
+	)
+	argument_parser.add_argument(
+		"-l",
+		"--label",
+		type = str,
+		dest = "label",
+		default = None,
+		metavar = "<label>",
+		help = "Anzeige-Name des Mitglieds",
+	)
+	argument_parser.add_argument(
+		"-E",
+		"--fixed-email-address",
+		dest = "fixed_email_address",
+		action = 'store_true',
 	)
 	argument_parser.add_argument(
 		"-e",
@@ -77,6 +95,12 @@ def main():
 		metavar = "<email-address>",
 		help = "E-Mail-Adresse des Mitglieds",
 	)
+	argument_parser.add_argument(
+		"-G",
+		"--fixed-groups",
+		dest = "fixed_groups",
+		action = 'store_true',
+	)
 	argument_parser.add_argument(
 		"-g",
 		"--groups",
@@ -86,6 +110,15 @@ def main():
 		metavar = "<groups>",
 		help = "Gruppen, zu welchen das Mitglied hinzugefügt werden soll, als Komma-getrennte Liste",
 	)
+	argument_parser.add_argument(
+		"-x",
+		"--expiry",
+		type = int,
+		dest = "expiry",
+		default = None,
+		metavar = "<expiry>",
+		help = "UNIX-Timestamp des Ablaufdatums der Einladung",
+	)
 	args = argument_parser.parse_args()
 	
 	## conf
@@ -104,7 +137,21 @@ def main():
 			),
 		}
 	)
+	
 	## exec
+	data = {
+		"id": args.id,
+		"name_changeable": (not args.fixed_name),
+		"name_value": args.name.replace("_", " "),
+		"label_changeable": (not args.fixed_label),
+		"label_value": args.label,
+		"email_address_changeable": (not args.fixed_email_address),
+		"email_address_value": args.email_address,
+		"groups_changeable": (not args.fixed_groups),
+		"groups_value": ([] if (args.groups is None) else args.groups.split(",")),
+		"expiry": args.expiry,
+	}
+	_sys.stderr.write(_json.dumps(data) + "\n")
 	if (args.action == "conf-schema"):
 		_sys.stdout.write(_json.dumps(conf_schema(), indent = "\t") + "\n")
 	elif (args.action == "conf-expose"):
@@ -115,7 +162,7 @@ def main():
 		_sys.stdout.write(_json.dumps(data, indent = "\t") + "\n")
 	elif (args.action == "member-read"):
 		if (
-			(args.id is None)
+			(data["id"] is None)
 		):
 			log_error(
 				"mandatory_parameters_missing",
@@ -127,39 +174,12 @@ def main():
 			)
 		else:
 			data = backend_api_call_member_read(
-				args.id
+				data["id"]
 			)
 			_sys.stdout.write(_json.dumps(data, indent = "\t") + "\n")
-	elif (args.action == "member-project"):
-		if (
-			(args.membership_number is None)
-			or
-			(args.name is None)
-			or
-			(args.email_address is None)
-		):
-			log_error(
-				"mandatory_parameters_missing",
-				{
-					"parameters": [
-						"membership_number",
-						"name",
-						"email_address",
-					]
-				}
-			)
-		else:
-			member_id = backend_api_call_member_project(
-				args.membership_number,
-				args.name.replace("_", " "),
-				args.email_address,
-				([] if (args.groups is None) else args.groups.split(",")),
-				None
-			)
-			_sys.stdout.write(_json.dumps(member_id, indent = "\t") + "\n")
 	elif (args.action == "member-delete"):
 		if (
-			(args.id is None)
+			(data["id"] is None)
 		):
 			log_error(
 				"mandatory_parameters_missing",
@@ -171,7 +191,40 @@ def main():
 			)
 		else:
 			member_id = backend_api_call_member_delete(
-				args.id
+				data["id"]
+			)
+	elif (args.action == "invite"):
+		if (
+			(data["name_value"] is None)
+			or
+			(data["label_value"] is None)
+			or
+			(data["email_address_value"] is None)
+			or
+			(data["groups_value"] is None)
+		):
+			log_error(
+				"mandatory_parameters_missing",
+				{
+					"parameters": [
+						"name",
+						"label",
+						"email_address",
+						"groups",
+					]
+				}
+			)
+		else:
+			link = backend_api_call_invitation_create(
+				data["name_changeable"],
+				data["name_value"],
+				data["label_changeable"],
+				data["label_value"],
+				data["email_address_changeable"],
+				data["email_address_value"],
+				data["groups_changeable"],
+				data["groups_value"],
+				data["expiry"]
 			)
 	else:
 		raise NotImplementedError()