While it is a step in the right direction, the /sites return is missing a vital component: a key field.

All of the data currently in /sites is the arbitrary data that can change.

We need a constant to use as a key for any cached data.

The key may be an arbitrary value. I suggest, as a general rule, the initials of the site.

e.g.

• so
• mso
• su
• sf
• sa

Also: can you please add the association_id as a root member of the /users/{id}/associated result so that these can be stored in a list.

Without keys, the value of stackauth is relegated to triviality.