They use a middleware server that is installed by Mint and connected to all the member banks that Mint has. This is usually done over the FIX protocol.
Mint, which was bought by Quicken, has partnerships with all the leading banks to be able to extract non-transactionable data from your bank account.
Mint, which was bought by Quicken, has partnerships with all the leading banks to be able to extract non-transactionable data from your bank account.