Theservice will assign two Application Keys (App Keys) to your Betfair account.
Upon creation, the Live Application Key will be inactive.
The Delayed App Key operates on the live (production) Betfair Exchange and not a testbed/sandbox environment.
The Delayed App Key should be used for development purposes and any functional testing. The key provides delayed Betfair price data. The delay is variable between 1-180 second snapshots.
Personal Betting Access - Application Key Overview
Please see below table for a summary of the data/services available to Delayed & Live Application Keys.