Mercury's official remote MCP server provides read-only access to business banking data including accounts, balances, transactions, cards, recipients, statements, treasury and invoices. It uses OAuth with time-limited tokens and cannot initiate transactions or modify data.
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Connect
- 1Connect it in ChatGPT
Turn on Developer mode in ChatGPT (Settings → Security and login), open Plugins, select + and paste https://mcp.mercury.com/mcp as the MCP server URL, then sign in with OAuth. Add it to a chat from the composer's tools menu.
- 2Or add it to Codex or the API
codex mcp add mercury --url https://mcp.mercury.com/mcp codex mcp login mercuryThe login command opens a browser to finish OAuth.
Configs are generated from the publisher's documented endpoint. Check their docs for plan requirements and scopes. New to this? Read the step-by-step tutorial.
Tools 12
getAccountsgetAccountlistTransactionsgetTransactiongetAccountStatementslistCardsgetRecipientsgetTreasurygetTreasuryTransactionslistInvoiceslistCustomersgetOrganizationThings to ask
- “What are my current balances across all Mercury accounts?”
- “List transactions over $1,000 from last month”
- “Show my treasury holdings”
- “Which invoices are still unpaid?”