diff --git a/polygon/rest/base.py b/polygon/rest/base.py
index d9d4768a..232af02e 100644
--- a/polygon/rest/base.py
+++ b/polygon/rest/base.py
@@ -2,9 +2,10 @@
 import json
 import urllib3
 import inspect
+from urllib3 import PoolManager, ProxyManager
 from urllib3.util.retry import Retry
 from enum import Enum
-from typing import Optional, Any, Dict
+from typing import Optional, Any, Dict, Union
 from datetime import datetime
 from importlib.metadata import version, PackageNotFoundError
 from .models.request import RequestOptionBuilder
@@ -22,6 +23,8 @@
 
 
 class BaseClient:
+    client: Union[PoolManager, ProxyManager]
+
     def __init__(
         self,
         api_key: Optional[str],
@@ -33,6 +36,7 @@ def __init__(
         verbose: bool,
         trace: bool,
         custom_json: Optional[Any] = None,
+        proxy: Optional[str] = None,
     ):
         if api_key is None:
             raise AuthError(
@@ -66,15 +70,25 @@ def __init__(
             backoff_factor=0.1,  # [0.0s, 0.2s, 0.4s, 0.8s, 1.6s, ...]
         )
 
-        # https://urllib3.readthedocs.io/en/stable/reference/urllib3.poolmanager.html
-        # https://urllib3.readthedocs.io/en/stable/reference/urllib3.connectionpool.html#urllib3.HTTPConnectionPool
-        self.client = urllib3.PoolManager(
-            num_pools=num_pools,
-            headers=self.headers,  # default headers sent with each request.
-            ca_certs=certifi.where(),
-            cert_reqs="CERT_REQUIRED",
-            retries=retry_strategy,  # use the customized Retry instance
-        )
+        if proxy:
+            self.client = urllib3.ProxyManager(
+                proxy_url=proxy,  # e.g., "http://proxy.example.com"
+                num_pools=num_pools,
+                headers=self.headers,
+                ca_certs=certifi.where(),
+                cert_reqs="CERT_REQUIRED",
+                retries=retry_strategy,
+            )
+        else:
+            # https://urllib3.readthedocs.io/en/stable/reference/urllib3.poolmanager.html
+            # https://urllib3.readthedocs.io/en/stable/reference/urllib3.connectionpool.html#urllib3.HTTPConnectionPool
+            self.client = urllib3.PoolManager(
+                num_pools=num_pools,
+                headers=self.headers,
+                ca_certs=certifi.where(),
+                cert_reqs="CERT_REQUIRED",
+                retries=retry_strategy,
+            )
 
         self.timeout = urllib3.Timeout(connect=connect_timeout, read=read_timeout)
 
@@ -102,6 +116,12 @@ def _get(
 
         headers = self._concat_headers(option.headers)
 
+        # Check if path is a full URL or a relative path
+        if path.startswith("http"):
+            url = path
+        else:
+            url = self.BASE + path
+
         if self.trace:
             full_url = f"{self.BASE}{path}"
             if params:
@@ -228,7 +248,7 @@ def _paginate_iter(
             for t in decoded[result_key]:
                 yield deserializer(t)
             if "next_url" in decoded:
-                path = decoded["next_url"].replace(self.BASE, "")
+                path = decoded["next_url"]  # Use full next_url
                 params = {}
             else:
                 return