diff --git a/.gitignore b/.gitignore
index d392f0e..f5797a2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.jar
+__pycache__
diff --git a/mcUp.py b/mcUp.py
index ad7a376..8b78663 100755
--- a/mcUp.py
+++ b/mcUp.py
@@ -3,14 +3,17 @@
 import parsers.paperMC
 import argparse
 import shutil
+import hashlib
+from os import error
 parser = argparse.ArgumentParser(description='A command-line tool to update a Minecraft Server.')
 parser.add_argument('api', metavar='api', help='which API to use')
 parser.add_argument('project', metavar='project', help='which project to query for')
 parser.add_argument('action', metavar='action', help='what action to execute')
 parser.add_argument('subAction', metavar='subAction', help='what sub action to execute')
+parser.add_argument('-o', nargs="?", help='Optional: Specify output filepath')
 args = parser.parse_args()
 print("mcUp.py, written by Caleb Fontenot")
-
+print(args.o)
 # PaperMC command functions
 def paperMC(project, action, subAction):
     if action == "get":
@@ -24,26 +27,26 @@ def paperMC(project, action, subAction):
         if subAction == "latest":
             latestVersion = parsers.paperMC.getLatest(project)
             output = parsers.paperMC.getJarInfo(project, latestVersion)
-            print(output["name"])
+            if args.o != None: # Check if user set an output filepath
+                output_file = args.o
+            else:
+                output_file = output["name"]
             with parsers.paperMC.downloadVersion(project, latestVersion) as raw:
-                with open(output["name"], 'wb') as file_object:
+                with open(output_file, 'wb') as file_object:
                     shutil.copyfileobj(raw.raw, file_object)
-            print("Downloaded "+latestVersion+" to "+output["name"])
+            print("Downloaded "+latestVersion+" to "+output_file)
+            #Calculate hash, compare with API given hash
+            h_sha256 = hashlib.sha256()
+            with open(output_file, 'rb') as file_object:
+                chunk = 0
+                while chunk != b'':
+                    chunk = file_object.read(1024) 
+                    h_sha256.update(chunk)
+            if h_sha256.hexdigest() == output["sha256"]:
+                print("sha256sum of downloaded file matches the sum that the API gave, jar is safe to use")
+            else: 
+                raise error
 
-        
-        #latestVersion = parsers.paperMC.getLatest(project)
-        #jarInfo = parsers.paperMC.getJarInfo(project, latestVersion)
-        #print(jarInfo)
-        #print(jarInfo[0])
-        #print(type(jarInfo))
-        
-
-
-
-
-#print(type(getVersionVelocity))
-
-#print("Latest build of velocity is", parsers.paperMC.getLatest#("velocity"))
 
 # Determine which API to use:
 if args.api == "paperMC":
diff --git a/parsers/__pycache__/paperMC.cpython-310.pyc b/parsers/__pycache__/paperMC.cpython-310.pyc
deleted file mode 100644
index e1981ee..0000000
Binary files a/parsers/__pycache__/paperMC.cpython-310.pyc and /dev/null differ
diff --git a/parsers/paperMC.py b/parsers/paperMC.py
index 1cd57d3..ef72a05 100644
--- a/parsers/paperMC.py
+++ b/parsers/paperMC.py
@@ -1,3 +1,4 @@
+from os import error
 import requests
 debug = False
 if debug == True:
@@ -10,12 +11,15 @@ if debug == True:
     requests_log.propagate = True
 timeoutTime = 1
 base_api_url = "https://papermc.io/api/v2"
+def failCheck(response):
+    print("Status Code is: "+str(response.status_code))
+    if response.status_code != 200:
+        raise error
 # This function returns the versions from a project from the Paper API.
 def getVersions(project):
     print("Calling getVersions()...")
-    print("Accessing "+base_api_url+"/projects/"+project+"...")
     response = requests.get(base_api_url+"/projects/"+project, timeout=timeoutTime)
-    print("Status Code is: "+str(response.status_code))
+    failCheck(response)
     api_response = response.json()
     return api_response['versions']
 
@@ -27,7 +31,7 @@ def getLatest(project):
 def getBuildNumber(project, version):
     print("Calling getBuildNumber()...")
     response = requests.get(base_api_url+"/projects/"+project+"/versions/"+version, timeout=timeoutTime)
-    print("Status Code is: "+str(response.status_code))
+    failCheck(response)
     api_response = response.json()
     return api_response['builds']
 
@@ -35,8 +39,8 @@ def getBuildInfo(project, version):
     print("Calling getBuildInfo()...")
     buildID1 = getBuildNumber(project, version)
     buildID = str(buildID1[-1])
-    print(base_api_url+"/projects/"+project+"/versions/"+version+"/builds/"+buildID)
     response = requests.get(base_api_url+"/projects/"+project+"/versions/"+version+"/builds/"+buildID, timeout=timeoutTime)
+    failCheck(response)
     api_response = response.json()
     return api_response
 
@@ -45,7 +49,6 @@ def getJarInfo(project, version):
     buildInfo = getBuildInfo(project, version)
     workingDict = buildInfo["downloads"]
     workingDict2 = workingDict["application"]
-    print(workingDict2)
     return workingDict2
 
 def downloadVersion(project, version):
@@ -54,4 +57,6 @@ def downloadVersion(project, version):
     buildID1 = getBuildNumber(project, version)
     buildID = str(buildID1[-1])
     response = requests.get(base_api_url+"/projects/"+project+"/versions/"+version+"/builds/"+buildID+"/downloads/"+jarName["name"], stream=True, timeout=timeoutTime)
+    failCheck(response)
     return response
+