The inbound API, in which the partner services realtime and periodic Plaid events, has two distinct modes — authorization and aggregation. Authorization extends the partner’s authentication frontier to the entire universe of Plaid applications. Aggregation allows the partner to act as a complete source of truth to all Plaid applications where users have connected their accounts.
The API also provides partners methods to enumerate Plaid applications connected to user accounts, and to drive UIs which empower users to manage those connections. Lastly, the API provides mechanisms whereby both Plaid and the partner can notify each other of key events, such as new connected applications, or new transactions available to fetch.