Full read-write Claude connector for Mercury
Have Claude draft payments and reconcile transactions in Mercury
Stop tab-switching between Claude and your banking dashboard to move money and tidy the books. Claude reads balances and transactions, drafts payments and updates recipients, and categorizes activity where you already work, with every money move gated behind your approval.
Mercury is a banking platform for startups and small businesses, covering checking and savings, payments, and corporate cards. Teams want Claude to do more than report balances: to move money, manage recipients, and act on accounts inside Mercury.
What is a Mercury MCP server?
A Mercury MCP server is a small hosted service that exposes Mercury's data and actions to Claude over the Model Context Protocol, so Claude can invoices, payments, and books inside your own account. We build it as a custom connector with separate read and write tools, and destructive actions stay gated behind your approval.
What can Mercury's current connector do today?
Today, Mercury publishes an official hosted MCP connector for Claude, but it is read-only by design, so Claude can query balances and transactions yet cannot move money, manage recipients, or otherwise act on your account. Mercury also offers an API with read and payment scopes, which a custom connector can wrap so Claude can read balances and propose write actions under scoped, human-in-the-loop controls.
What does full read-write Mercury access unlock?
Full read-write Mercury access lets Claude draft and queue payments, add or update recipients, label and categorize transactions, and pull statements, all from a chat. The reconciliation and payment prep that used to mean tab-switching happen where you already ask Claude to work, with each money move gated behind your approval.
- Draft an ACH or wire payment to an existing recipient for your approval
- Add or update a payment recipient and their account details
- Categorize and add notes or memos to transactions for bookkeeping
- Queue a batch of vendor payments from an invoice list you provide
- Pull a statement or transaction export for a given account and period
Can Claude draft a payment in Mercury?
Yes, Claude can draft a payment in Mercury. With a full read-write connector it prepares an ACH or wire to an existing recipient, or queues a batch from an invoice list you provide. The payment is only submitted after you approve it, so Claude never moves money on its own.
Can Claude categorize and reconcile transactions in Mercury?
Yes. Claude can read your Mercury transactions, then add notes, memos, and categories for bookkeeping, and pull a statement or export for a given account and period. It works inside the scopes of the API token you issue, so it only touches what that token allows and nothing more.
Can Claude add or update recipients in Mercury?
Claude can add a new payment recipient or update an existing one's account details in Mercury, so a payment is ready to draft against it. Recipient changes and any money movement stay gated behind your confirmation, and the connector never has more access than the token you generate.
How a Mercury connector works
We build a small MCP server that connects to the Mercury API using a scoped API token, with read tools (balances, transactions, statements) kept separate from write tools (create recipient, draft payment). Money movement and other outbound actions are gated behind your confirmation, and the connector never has more access than the token you issue. Where Mercury supports it, the token can be IP-allowlisted so calls only originate from your server.
Frequently asked questions
Can Claude actually send a payment from my Mercury account?
Is there an official Mercury connector for Claude already?
Does the connector get more access to my account than I do?
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