diff --git a/src/nightserver.py b/src/nightserver.py
index fe1b8c2..4c4cf70 100644
--- a/src/nightserver.py
+++ b/src/nightserver.py
@@ -1,8 +1,17 @@
 from flask import Flask, render_template, jsonify, request
+from flask_apscheduler import APScheduler
 from copy import copy
 import uuid
+import time
+import requests
+
+
 app = Flask(__name__)
 
+# UUID used for internal calls.
+internalUUID = str(uuid.uuid4())
+
+
 # Vitals
 vitalsHeartrate = None
 vitalsOxygen = None
@@ -427,6 +436,10 @@ def setEnvironmentHumidity():
 #  allowed to set the requested endpoint.
 # This is ONLY used for PUSH requests currently.
 def authenticate(uuid, endpoint):
+	# Check for internal UUID
+	if uuid == internalUUID:
+		return True
+
 	for c in cyberware: # UUID Match
 		if c['uuid'] == uuid:
 			requestedHardware = c
@@ -444,3 +457,72 @@ def authenticate(uuid, endpoint):
 @app.route('/')
 def uiindex():
 	return render_template('index.html')
+
+
+# Maintenance functions
+# The jank, my oh my
+valuesToValidate = [ '/api/vitals/heartrate', '/api/vitals/oxygen', '/api/vitals/bodytemp',
+			'/api/fitness/steps',
+			'/api/environment/temperature', '/api/environment/humidity']
+baseURL = "http://localhost:5000"
+# Value invalidation. A value is deemed invalid when there's no hardware attached
+#  that can set it.
+# This has the potential to become very slow. A better solution is needed.
+def valueInvalidation():
+	print("Start value invalidation")
+
+	# Search for invalid values
+	invalidated = copy(valuesToValidate)
+	for c in cyberware:
+		for value in valuesToInvalidate:
+			if value in c["canSet"]:
+				invalidated.remove(value)
+
+	# Value invalidation begins
+	invalidStr = ""
+	for invalidValue in invalidated:
+		# Now this looks stupid, but since the key to post is always supposed to be the same
+		#  as the last part of the path, this works.
+		# Does that make sense? I'm tired...
+		key = invalidValue.split('/')[-1]
+
+		endpointToReset = baseURL + invalidValue
+
+		requests.post(endpointToReset, json={ key: None, 'uuid': internalUUID })
+		invalidStr = invalidStr + invalidValue + ", "
+
+	print("Values invalidated: " + invalidStr)
+
+# Device invalidation. A device is deemed invalid after no contact for 15 seconds.
+def deviceInvalidation():
+	print("Device invalidation not implemented")
+
+
+# APScheduler config
+class Config:
+	JOBS = [
+		{
+			"id": "valueInvalidation",
+			"func": "nightserver:valueInvalidation",
+			"trigger": "interval",
+			"seconds": 10,
+		},
+		{
+			"id": "deviceInvalidation",
+			"func": "nightserver:deviceInvalidation",
+			"trigger": "interval",
+			"seconds": 15
+		}
+	]
+
+	SCHEDULER_API_ENABLED = True
+
+# Config Flask and APScheduler
+app.config.from_object(Config())
+
+scheduler = APScheduler()
+
+scheduler.init_app(app)
+scheduler.start()
+
+app.run()