diff --git a/src/ciclostile/web/api.py b/src/ciclostile/web/api.py
index 587b102..89e2eb8 100755
--- a/src/ciclostile/web/api.py
+++ b/src/ciclostile/web/api.py
@@ -58,5 +58,8 @@ POST_DIR = "."
 
 @api.route("/posts")
 def posts_list():
+    """
+    Returns all .md files under POST_DIR
+    """
     posts = glob(f"{POST_DIR}/**/*.md", recursive=True)
     return jsonify(posts)