diff --git a/hyperliquid/info.py b/hyperliquid/info.py
index 360d0588..80a0b012 100644
--- a/hyperliquid/info.py
+++ b/hyperliquid/info.py
@@ -1,5 +1,6 @@
 from hyperliquid.api import API
 from hyperliquid.utils.types import (
+    ActiveAssetData,
     Any,
     Callable,
     Cloid,
@@ -127,6 +128,32 @@ def user_state(self, address: str, dex: str = "") -> Any:
         """
         return self.post("/info", {"type": "clearinghouseState", "user": address, "dex": dex})
 
+    def active_asset_data(self, user: str, coin: str) -> ActiveAssetData:
+        """Retrieve a user's active data for a specific asset.
+
+        POST /info
+
+        Args:
+            user (str): Onchain address in 42-character hexadecimal format;
+                        e.g. 0x0000000000000000000000000000000000000000.
+            coin (str): Perp coin name, e.g. "ETH".
+
+        Returns:
+            {
+                user: str,
+                coin: str,
+                leverage: {
+                    type: "cross" | "isolated",
+                    value: int,
+                    rawUsd: float string  # only if type is "isolated"
+                },
+                maxTradeSzs: [float string, float string],
+                availableToTrade: [float string, float string],
+                markPx: float string,
+            }
+        """
+        return cast(ActiveAssetData, self.post("/info", {"type": "activeAssetData", "user": user, "coin": coin}))
+
     def spot_user_state(self, address: str) -> Any:
         return self.post("/info", {"type": "spotClearinghouseState", "user": address})
 
diff --git a/tests/info_test.py b/tests/info_test.py
index 79e146c9..0eaeafa0 100644
--- a/tests/info_test.py
+++ b/tests/info_test.py
@@ -15,6 +15,32 @@ def test_get_user_state():
     assert response["marginSummary"]["accountValue"] == "1182.312496"
 
 
+def test_active_asset_data_posts_expected_payload(monkeypatch):
+    info = Info(skip_ws=True, meta=TEST_META, spot_meta=TEST_SPOT_META)
+    user = "0x0000000000000000000000000000000000000000"
+    expected_response = {
+        "user": user,
+        "coin": "ETH",
+        "leverage": {"type": "cross", "value": 20},
+        "maxTradeSzs": ("1.0", "2.0"),
+        "availableToTrade": ("3.0", "4.0"),
+        "markPx": "2000.0",
+    }
+    posted = {}
+
+    def fake_post(url_path, payload):
+        posted["url_path"] = url_path
+        posted["payload"] = payload
+        return expected_response
+
+    monkeypatch.setattr(info, "post", fake_post)
+
+    response = info.active_asset_data(user, "ETH")
+
+    assert response == expected_response
+    assert posted == {"url_path": "/info", "payload": {"type": "activeAssetData", "user": user, "coin": "ETH"}}
+
+
 @pytest.mark.vcr()
 def test_get_open_orders():
     info = Info(skip_ws=True, meta=TEST_META, spot_meta=TEST_SPOT_META)