puter.kv.MAX_KEY_SIZEA property of the puter.kv object that returns the maximum key size (in bytes) for the key-value store.
puter.kv.MAX_KEY_SIZE
Get the max key size
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.print("Max Key Size: " + puter.kv.MAX_KEY_SIZE);
</script>
</body>
</html>