diff --git a/extract/padelnomics_extract/src/padelnomics_extract/proxy.py b/extract/padelnomics_extract/src/padelnomics_extract/proxy.py
index 0e8c82e..7a8b5f5 100644
--- a/extract/padelnomics_extract/src/padelnomics_extract/proxy.py
+++ b/extract/padelnomics_extract/src/padelnomics_extract/proxy.py
@@ -57,6 +57,27 @@ def make_round_robin_cycler(proxy_urls: list[str]):
     return next_proxy
 
 
+def make_sticky_selector(proxy_urls: list[str]):
+    """Hash-based sticky proxy selector.
+
+    Returns a callable: select_proxy(key: str) -> str | None
+    The same key always maps to the same proxy (consistent hashing).
+    Returns None-returning callable if no proxies configured.
+    """
+    if not proxy_urls:
+        return lambda key: None
+
+    n = len(proxy_urls)
+
+    def select_proxy(key: str) -> str:
+        import hashlib
+
+        idx = int(hashlib.md5(key.encode(), usedforsecurity=False).hexdigest(), 16) % n
+        return proxy_urls[idx]
+
+    return select_proxy
+
+
 def make_tiered_cycler(
     primary_urls: list[str],
     fallback_urls: list[str],