diff --git a/dvc/api.py b/dvc/api.py
index 5bf1517af..bf79b682e 100644
--- a/dvc/api.py
+++ b/dvc/api.py
@@ -34,7 +34,8 @@ def get_url(path, repo=None, rev=None, remote=None):
             raise OutputNotFoundError(path, repo)
 
         cloud = metadata.repo.cloud
-        hash_info = _repo.repo_tree.get_hash(path_info)
+        with _repo.state:
+            hash_info = _repo.repo_tree.get_hash(path_info)
         return cloud.get_url_for(remote, checksum=hash_info.value)
 
 
diff --git a/tests/func/test_api.py b/tests/func/test_api.py
index a736103a1..acf8063ce 100644
--- a/tests/func/test_api.py
+++ b/tests/func/test_api.py
@@ -210,6 +210,9 @@ def test_get_url_granular(tmp_dir, dvc, s3):
         {"dir": {"foo": "foo", "bar": "bar", "nested": {"file": "file"}}}
     )
 
+    expected_url = URLInfo(s3.url) / "5f/c28ea78987408341668eba6525ebd1.dir"
+    assert api.get_url("dir") == expected_url
+
     expected_url = URLInfo(s3.url) / "ac/bd18db4cc2f85cedef654fccc4a4d8"
     assert api.get_url("dir/foo") == expected_url