diff --git a/pyzxz/pyzxz.py b/pyzxz/pyzxz.py
index 0d72445..aff3217 100644
--- a/pyzxz/pyzxz.py
+++ b/pyzxz/pyzxz.py
@@ -1,5 +1,4 @@
 import aiohttp
-import asyncio
 from pathlib import Path
 from typing import Union
 
@@ -14,24 +13,25 @@ class ZeroXZero:
     - Check service availability
     """
 
-    ENDPOINT_URL = "https://0x0.st"
     HEADERS = {
         "User-Agent": "pyzxz-uploader/1.0 (https://github.com/yourrepo)"
     }
 
-    @staticmethod
-    async def upload(file_path: Union[str, Path]) -> str:
+    def __init__(self, endpoint_url: str = "https://0x0.st"):
+        self.endpoint_url = endpoint_url
+
+    async def upload(self, file_path: Union[str, Path]) -> str:
         file_path = Path(file_path)
 
         if not file_path.exists():
             raise FileNotFoundError(f"No such file: {file_path}")
 
-        async with aiohttp.ClientSession(headers=ZeroXZero.HEADERS) as session:
+        async with aiohttp.ClientSession(headers=self.HEADERS) as session:
             with file_path.open("rb") as f:
                 data = aiohttp.FormData()
                 data.add_field("file", f, filename=file_path.name)
                 async with session.post(
-                    ZeroXZero.ENDPOINT_URL,
+                    self.endpoint_url,
                     data=data
                 ) as response:
                     text = await response.text()
@@ -39,13 +39,12 @@ class ZeroXZero:
                         return text.strip()
                     raise ValueError(f"Upload failed: {text.strip()}")
 
-    @staticmethod
-    async def upload_from_bytes(data: bytes, filename: str) -> str:
-        async with aiohttp.ClientSession(headers=ZeroXZero.HEADERS) as session:
+    async def upload_from_bytes(self, data: bytes, filename: str) -> str:
+        async with aiohttp.ClientSession(headers=self.HEADERS) as session:
             form = aiohttp.FormData()
             form.add_field("file", data, filename=filename)
             async with session.post(
-                ZeroXZero.ENDPOINT_URL,
+                self.endpoint_url,
                 data=form
             ) as response:
                 text = await response.text()
@@ -53,16 +52,14 @@ class ZeroXZero:
                     return text.strip()
                 raise ValueError(f"Upload failed: {text.strip()}")
 
-    @staticmethod
-    async def upload_text(text: str, filename: str = "text.txt") -> str:
-        return await ZeroXZero.upload_from_bytes(text.encode("utf-8"), filename)
+    async def upload_text(self, text: str, filename: str = "text.txt") -> str:
+        return await self.upload_from_bytes(text.encode("utf-8"), filename)
 
-    @staticmethod
-    async def is_available() -> bool:
+    async def is_available(self) -> bool:
         try:
-            async with aiohttp.ClientSession(headers=ZeroXZero.HEADERS) as session:
+            async with aiohttp.ClientSession(headers=self.HEADERS) as session:
                 async with session.head(
-                    ZeroXZero.ENDPOINT_URL,
+                    self.endpoint_url,
                     timeout=aiohttp.ClientTimeout(total=3)
                 ) as response:
                     return response.status == 200