diff --git a/asu/main.py b/asu/main.py
index 8602bac4..d8b021bd 100644
--- a/asu/main.py
+++ b/asu/main.py
@@ -127,8 +127,17 @@ def generate_latest():
 
 @app.get("/json/v1/latest.json")
 def json_v1_latest():
+    """Returns two lists:
+
+    1) A list of the latest releases on each branch that is still
+       under support, including any upcoming RC versions.  Sorted by
+       release branch, with newest first.
+
+    2) A list of all available versions (both releases and snapshot),
+       sorted newest first.
+    """
     latest = generate_latest()
-    return {"latest": latest}
+    return {"latest": latest, "versions": app.versions}
 
 
 def generate_branches():
diff --git a/tests/test_api.py b/tests/test_api.py
index 5e35736b..10249595 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -264,6 +264,13 @@ def test_api_latest_default(client):
     response = client.get("/api/v1/latest", follow_redirects=False)
     assert response.status_code == 301
 
+    response = client.get("/api/v1/latest", follow_redirects=True)
+    assert response.status_code == 200
+    data = response.json()
+    assert data["latest"] == ["24.10.0-rc6", "23.05.5", "22.03.7"]
+    assert data["versions"][0] == "SNAPSHOT"
+    assert data["versions"][-1] == "1.2-SNAPSHOT"
+
 
 def test_api_overview(client):
     response = client.get("/api/v1/overview", follow_redirects=False)