Delete an app

Revokes the credentials and marks the app as deleted. Tokens already issued stop working: the token endpoint checks that the app still exists before answering, and requests carrying an old token no longer resolve to an app.

Needs a USER token, not an app token. With client credentials it answers ERROR_CODE_512. No plan is required: apps are on all four plans, the free one included — what the plan decides is how many you can hold at once and how fast you can call.