Authentication to the API is performed via HTTP Basic Auth. Use your API key as the username and your secret API key as the password. Your secret API key provides access to your account and transaction information, so don’t share or display it publicly.
All API requests must be made over HTTPS. Calls made over plain HTTP will fail. API requests without authentication will also fail.
curl -u <api-key>:<secret-key> https://api.getbread.com/transactions/:tx_id