diff --git a/src/danbooru_backend.py b/src/danbooru_backend.py
index 5078a70..5882dcc 100644
--- a/src/danbooru_backend.py
+++ b/src/danbooru_backend.py
@@ -76,14 +76,16 @@ class downloader:
 	password = None
 	max_size = None
 	tmp = None
-	# Limit for posts.json is 200
-	limit=100
+	url = ""
+	api_endpoint = "posts.json?random=true&limit=100"
+	api_tags = "&tags={}"
 
 	def __init__(self, backend_credentials):
 		self.username = backend_credentials["username"]
 		self.password = backend_credentials["password"]
 		self.max_size = backend_credentials["max_size"]
 		self.tmp = backend_credentials["tmp_dir"]
+		self.url = backend_credentials["url"]
 
 
 	def download_post(self, post):
@@ -105,11 +107,11 @@ class downloader:
 	def fetch_post(self, profile):
 		# Search ratings: s=safe, e=nsfw
 		# base_url = "https://danbooru.donmai.us/posts.json?random=true&tags={}&rating=e&limit=1"
+		search_url = "/".join((self.url, self.api_endpoint))
 		tags = profile["tags"]
-		search_url = "https://danbooru.donmai.us/posts.json?random=true&limit={}".format(self.limit)
 		if tags and not random_tag(*tags):
 			search_tags = "+".join(tags)
-			search_url = "{}&tags={}".format(search_url, search_tags)
+			search_url += self.api_tags.format(search_tags)
 		
 		search_request = None
 		if self.username and self.password:
@@ -118,12 +120,12 @@ class downloader:
 					)
 		else:
 			search_request = requests.get(search_url)
-	
+
 		if search_request.status_code != 200:
 			print(search_url)
 			print("Search request returned:", search_request.status_code)
 			return None
-		
+
 		selected = select_from_response(search_request.json(), profile, self.max_size)
 
 		if selected is None: