How do I see what a connected app has done?

Open Connected Apps: on the web, Account, then Apps and Security, then Connected Apps; in the Clutter Sale app, the You tab, then Connected Apps.

Recent Activity
The latest 50 things your apps did: each action, how it turned out, and when. "App Connected" and "Available Actions Checked" are an app connecting and looking at what it is allowed to do.

Requests & Drafts
The latest 30 requests, purchases and private drafts, each with its status, such as Awaiting Your Approval, In Progress or Completed. Open one to see its full detail. Older ones still open from their original link.

Your Connections
Press Details on a connection to see the actions it is allowed and its keys.

Where the results show
What an app did also appears where it normally would: a published listing among your listings, a sent message in its conversation, a ticket in Support, a purchase in your deals.

Something you don't recognise
Disconnect the app straight away (see "How do I disconnect an app or cancel its key?"), then contact support. Completed actions stay in your account, so tell us what you found.