diff --git a/mods/ITEMS/mcl_cauldrons/API.md b/mods/ITEMS/mcl_cauldrons/API.md
index 5a4485721..456798e76 100644
--- a/mods/ITEMS/mcl_cauldrons/API.md
+++ b/mods/ITEMS/mcl_cauldrons/API.md
@@ -2,6 +2,9 @@
 
 This mod add an API to add cauldrons to mcl.
 
+## mcl_cauldrons.is_cauldron(name)
+return true if name is cauldron, false overwise.
+
 ## mcl_cauldrons.register_cauldron_type(def)
 def can have these fields:
 * name: name of the liquid e.g: "water"