What the AI does with
your AMEX activity.
Connecting American Express isn't the finish line — it's the input. Here is what SuperBooks does with each transaction, and the one step that stays yours.
Every AMEX transaction syncs into SuperBooks through Plaid — read-only. We can see the money move; we can never move it.
Upload a receipt, then attach it to the AMEX transaction it belongs to. It stays linked from then on.
Each AMEX expense is sorted into a category you control, and the expenses-by-category report adds them up for your accountant.
Profit and loss, burn rate and runway are computed from your AMEX feed each time you open them, so they are never a month behind.
Annual fees, interest, and statement credits on your American Express card arrive with the rest of the feed and are categorized like any other charge — so nothing on the statement slips past your books.
Every currency,
kept as it happened.
AMEX posts in USD. Invoice a client in EUR or pay a vendor in GBP: each account, transaction and invoice keeps the currency it happened in, and your invoice totals convert to USD at the day's published rate.
One read-only link to set up.
Up to two years of history.
SuperBooks asks Plaid for up to 24 months of AMEX transactions and categorizes each one it is confident about.
We can't move your money.
That's by design.
Plaid handles authentication. We hold a read-only OAuth token and nothing else — your AMEX credentials never touch our servers.
Full security disclosureWhat people ask before
they connect AMEX.
Straight answers, each one true of SuperBooks as it ships today rather than as it is planned.
Does American Express work with Plaid?
Yes. Plaid lists AMEX as "American Express", institution ID ins_10. In the snapshot of Plaid's institution list SuperBooks took on July 12, 2026, it is one of 9,761 active US institutions.
Can I connect American Express to QuickBooks or other accounting software?
SuperBooks has no QuickBooks connection: it is bookkeeping software itself, and it connects to AMEX through Plaid. To take those transactions into another tool, export them as a CSV: one file of the transactions you select, with a column naming the bank account each one came from.
Do I need a American Express API or developer key?
No. SuperBooks reaches AMEX through Plaid, read-only, and you connect with the AMEX login you already use, so there are no developer credentials to request from the bank. Your own data is then readable over the SuperBooks REST API, its TypeScript and Python SDKs, and its MCP server — on every plan.
How do I link my American Express business and personal accounts?
Sign in to AMEX through Plaid with the login that holds those accounts; SuperBooks then lists every account Plaid returns for it, and you choose which ones sync. All of them count as one bank connection on your plan. SuperBooks keeps one login per Plaid institution for each company — for AMEX, Plaid's "American Express" record — so connecting it again replaces that login instead of adding a second one. If your personal and business accounts sit under two separate logins there, only one of them can be connected at a time.
Does SuperBooks store my American Express login?
No. You sign in through Plaid — in Plaid's own window, or on AMEX's own site if AMEX uses OAuth — so your password goes to Plaid or AMEX, never to SuperBooks. The only credential SuperBooks holds is a read-only token for transactions and balances — it can never move money — and disconnecting AMEX revokes it.
How much American Express history comes across?
SuperBooks asks Plaid for up to 730 days — roughly two years — the first time you connect. How much of that actually arrives depends on what AMEX makes available through Plaid.
Does SuperBooks categorize American Express transactions automatically?
Yes, when it is confident. SuperBooks applies a category above a 0.7 confidence score; below that it writes nothing rather than guessing, so the AMEX transaction stays uncategorized in your list until you set it.
Can I export my American Express transactions?
Yes — your transactions export as a CSV on every plan and from every role, so you can hand AMEX activity to an accountant or load it into another tool whenever you want.
What does connecting American Express cost?
Nothing to start: the free plan includes 1 bank connection and takes no credit card. Starter raises that to 3 connections and Pro to 10.
