What the AI does with
your Mercury activity.
Connecting Mercury 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 Mercury 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 Mercury transaction it belongs to. It stays linked from then on.
Each Mercury 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 Mercury feed each time you open them, so they are never a month behind.
SuperBooks asks Plaid for up to 24 months of Mercury history the moment you connect — how much comes back is Mercury's call — so your first month starts with history already behind it.
Every currency,
kept as it happened.
Mercury 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 Mercury 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 — what you enter to connect goes to Plaid, never to our servers.
Full security disclosureWhat people ask before
they connect Mercury.
Straight answers, each one true of SuperBooks as it ships today rather than as it is planned.
Does Mercury work with Plaid?
Yes. Plaid's own institution page, listed as "Mercury", shows it supported in the United States, for Assets, Auth, Balance, Transactions, checked 2026-09-27: https://plaid.com/institutions/mercury/.
Can I connect Mercury to QuickBooks or other accounting software?
SuperBooks has no QuickBooks connection: it is bookkeeping software itself, and it connects to Mercury 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 my own Mercury API access or developer key?
No. SuperBooks reaches Mercury through Plaid, read-only, and Plaid runs the connection, 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 Mercury business and personal accounts?
Connect Mercury through Plaid, choosing the online-banking profile 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 connection per Plaid institution for each company — for Mercury, Plaid's "Mercury" record — so connecting it again replaces that connection instead of adding a second one. If your personal and business accounts sit under two separate online-banking profiles there, only one of them can be connected at a time.
Who handles the connection when I link Mercury through Plaid?
Plaid does. You connect through Plaid — in Plaid's own window, or on Mercury's own site if Mercury uses OAuth — so what you enter goes to Plaid or Mercury, never to SuperBooks. All SuperBooks receives is a read-only token for transactions and balances — it can never move money — and disconnecting Mercury asks Plaid to revoke it.
What does Mercury share with Plaid when I connect SuperBooks?
For SuperBooks, transactions and balances, read-only. SuperBooks requests one Plaid product, Transactions, so that is what the connection carries, and it requests nothing that can move money. SuperBooks then lists the accounts Plaid returns and syncs only the ones you switch on. What Mercury and Plaid exchange beyond that is set by their own terms.
What is Plaid on my Mercury account, and how do I disconnect it?
Plaid is the service SuperBooks uses to reach Mercury. Plaid describes itself as "a financial technology company that helps you connect your financial accounts to the apps and services you choose" (https://plaid.com/what-is-plaid/, checked October 16, 2026). To disconnect Mercury in SuperBooks, open Settings, Bank Connections and use the Delete icon on its connection, then type DELETE and confirm. That permanently removes the connection's accounts and transaction history from SuperBooks, and, if SuperBooks still holds the connection's access token, it then asks Plaid to revoke that read-only access to transactions and balances. To review every app you have linked through Plaid, Plaid says: "Plaid Portal lets you view connected apps, manage permissions, and disconnect accounts you no longer want to share with an app or service."
Mercury Plaid not working, or stopped syncing?
Reconnect it. Each connection in Settings, Bank Connections has a Reconnect icon. It reopens Plaid on that same connection (Plaid's update mode) instead of adding a new one, then syncs again, so it does not use up a second bank connection on your plan. Whether Mercury can be reached through Plaid at a given moment is up to Plaid and Mercury, not SuperBooks.
How much Mercury 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 Mercury makes available through Plaid.
Does SuperBooks categorize Mercury 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 Mercury transaction stays uncategorized in your list until you set it.
Can I export my Mercury transactions?
Yes — your transactions export as a CSV on every plan and from every role, so you can hand Mercury activity to an accountant or load it into another tool whenever you want.
What does connecting Mercury 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.
Connect your Mercury account.
Let the AI keep the books.
The Mercury name and logo are trademarks of their owner, shown here only to name the bank you can connect; other bank names and logos on this page belong to their respective owners. SuperBooks is not affiliated with, endorsed by, or sponsored by Mercury or any other bank named here. SuperBooks never asks for your bank username or password: you connect through Plaid, in Plaid's own window or on your bank's own site. Plaid is a trademark of Plaid Inc.