Open Finance
Accounts, transactions and investments by consent, with a hosted connection widget and webhooks on every status change.
Itaú
CHECKING_ACCOUNT
currentBalance
R$47,635.27
Credit card
R$ 3,184.40
open statement
Investments
R$ 212,540.00
CDB, 110% of CDI
Transactions
TRANSACTIONS_CREATEDClients and partners
Openi's Open Finance API lets your application read, with the user's consent, accounts, transactions and investments from Brazilian financial institutions in a single format. Your backend creates a connection session, the user authorizes access in the Connect widget and the data arrives by API and by webhooks.
Your backend calls POST /v1/connect-sessions with the API Key and receives a temporary connectUrl.
Connect handles institution selection, credentials and OAuth. None of it goes through your application.
The user returns to your redirectUrl with itemId and status. Webhooks report every change to the connection.
With the itemId you list accounts, transactions and investments, with pagination and date filters.
curl -X POST "$OPENI_API/v1/connect-sessions" \
-H "Authorization: Bearer $OPENI_API_KEY" \
-H "Content-Type: application/json" \
-d '{ "redirectUrl": "https://app.suaempresa.com.br/callback" }'
# The response includes the connectUrl.
# After connecting, the user returns to:
# https://app.suaempresa.com.br/callback?itemId=...&status=successCaseBank accounts
Fiotec reads 4,000 bank accounts through Open Finance, with thousands of transactions a month. Balances and transactions from every institution arrive in the same format, with the account holder's consent, and feed financial control with no statement downloaded by hand.
Bank A · Project 01
Checking account
Balance and transactions
Up to date
Bank B · Project 02
Checking account
Balance and transactions
Up to date
Bank A · Project 03
Investment
Balance and transactions
Up to date
Bank C · Project 04
Checking account
Consent
Renewal due
Sample data, to illustrate the flow.
Institution list, form, OAuth and sync progress in a ready-made interface. The session expires on its own and its key gives no access to account data.
List and search institutions by name. Each connector states the parameters required to create the connection.
Payer, payee, operation type and the original description preserved on every transaction.
Positions, snapshots and movements of the connected portfolios.
Item and transaction events, with retries and idempotency guidance in the documentation.
“We integrated Open Finance in one sprint. The documentation answers before we need to ask.”
“The reconciliation that took the team two days now runs on its own.”
Teams from fintechs, retail and accounting already integrate with Openi.
Request accessRead the endpoints, copy the examples above and request credentials to make the same calls with your own data.