diff --git a/swh/loader/pypi/loader.py b/swh/loader/pypi/loader.py
--- a/swh/loader/pypi/loader.py
+++ b/swh/loader/pypi/loader.py
@@ -242,3 +242,19 @@
         if self.done:
             self.generate_and_load_snapshot()
             self.flush()
+
+
+if __name__ == '__main__':
+    import logging
+    import sys
+    logging.basicConfig(level=logging.DEBUG)
+    if len(sys.argv) != 2:
+        logging.error('Usage: %s <module-name>' % sys.argv[0])
+        sys.exit(1)
+    module_name = sys.argv[1]
+    loader = PyPILoader()
+    loader.load(
+        module_name,
+        'https://pypi.org/projects/%s/' % module_name,
+        'https://pypi.org/pypi/%s/json' % module_name,
+    )