The Best Mercury Integrations and Apps in 2026
Mercury is the business banking stack a lot of startups run on — checking, savings, cards, and bill pay in one place. Because it’s a bank, the integrations that matter most are the ones that keep your books clean and your money visible: accounting sync, payment processors, payroll, and spend management. Mercury has solid native connectors for the systems finance teams already use, plus a genuinely good API for everything else.
Here are the Mercury integrations actually worth setting up, grouped by what they do — and then the way to connect Mercury to anything with an API, even when no native integration exists.
Accounting: QuickBooks, Xero, and NetSuite
This is the core of Mercury’s ecosystem. Each of these syncs transaction data automatically so reconciliation isn’t a manual chore.
- QuickBooks Online — pulls Mercury transactions daily with merchant details and AI-suggested categories that learn from your patterns.
- Xero — daily transaction sync through bank feeds, with enriched merchant metadata and suggested categories you review before they hit your books.
- NetSuite — routes banking data into the general ledger with the enriched feeds needed for automated reconciliation (available on Mercury’s paid tier).
Payment processors: Stripe, Shopify, Square, and PayPal
- Stripe, Shopify, Square, PayPal — connect the tools that collect your revenue so payouts land in Mercury and reconcile cleanly against your accounting. Useful for e-commerce and SaaS teams tracking cash from sales to bank.
Payroll and HR: Gusto, ADP, TriNet, and Rippling
- Gusto, ADP, TriNet, Sequoia One — authorize wire drawdowns for payroll so pay runs settle from your Mercury account without manual transfers.
- Rippling — sync payroll and spend data alongside your banking for a fuller finance picture.
Spend and bill management: Ramp
- Ramp — link Mercury to unlock higher card limits, manage bills, and close the books faster, paying vendors in a few clicks against your Mercury balance.
Data connectivity: Plaid
- Plaid — Mercury is supported as a bank through Plaid, so tools that read financial data (many payroll and lending apps) can securely access your balances and transactions with your permission.
No-code and custom: CSV, Zapier, and the API
- CSV export — download transactions to upload into any accounting platform manually.
- Zapier — trigger simple no-code workflows off Mercury events, though it’s built for basic field-mapping, not for reasoning over your data.
- Mercury API — a genuinely strong REST API with read-only, read-write, and custom tokens. Read-only tokens fetch all your account data (balances, transactions) without the ability to move money, which makes them safe for reporting and reconciliation automations.
The AI way to connect Mercury to anything: Carly
Native connectors cover accounting, payments, and payroll. But the moment you need Mercury tied to a tool that isn’t on the list — a Slack alert when a large transaction clears, a weekly cash summary emailed to your board — or you want something smarter than “new transaction → copy field,” you’ve hit the ceiling of native integrations and no-code triggers.
Carly is an AI executive assistant that connects to 200+ tools and, crucially, lets you bring your own API key to connect to anything with a REST API — Mercury included. It’s honest to say Carly is not a native Mercury integration: it connects through your own Mercury API token, and with a read-only token it can watch and report on your account without ever moving money. You get an agent that:
- Acts on triggers, 24/7 in the cloud — when a transaction posts or a balance crosses a threshold, Carly does the next step without you in the app.
- Reasons over your data — not just “copy this field,” but “read this week’s transactions, flag anything over $10,000 to the CFO, and summarize burn.”
- Ties Mercury to the rest of your stack — a balance alert becomes one step in a workflow that also touches email (Gmail and Outlook), Slack, and your spreadsheets.
- Builds the workflow from a plain-English description — tell it “every Monday, email me Mercury balances and any transaction above $5,000 from last week” and it interviews you, then builds it.
Keep the money-movement conservative: point Carly at a read-only token so it reads balances, flags transactions, and helps you reconcile — not initiate payments. AI agents start at $35/month, and steps in a workflow that don’t use AI run free and unlimited. See the full Claude + Mercury integration guide for how the API-token connection works.
How to connect Mercury to a tool with no native integration
- In Mercury, generate an API token (Settings → API tokens) — choose a read-only token if you only need to read balances and transactions, which keeps the automation safe.
- Paste your API token into Carly on the integrations page.
- Describe the workflow in plain English, and Carly builds it — connecting Mercury to whatever else you need, on triggers, without your laptop open.
Frequently Asked Questions
Does Mercury have integrations?
Yes. Mercury integrates natively with QuickBooks Online, Xero, and NetSuite for accounting; Stripe, Shopify, Square, and PayPal for payments; Gusto, ADP, TriNet, and Rippling for payroll; and Ramp for spend management. It also supports Plaid, CSV export, Zapier, and a full REST API for custom connections.
What is the best Mercury integration for automation?
For accounting, the direct QuickBooks, Xero, or NetSuite sync is best. For automation that reacts to transactions and reasons over your data — or connects Mercury to a tool with no native integration — an AI agent like Carly connects via your Mercury API token (use a read-only token to keep it safe) and runs workflows in the cloud.
How do I connect Mercury to an app that isn’t listed?
Use Mercury’s REST API. Generate an API token in Settings → API tokens (a read-only token is safest for reporting), then hand it to a platform that supports bring-your-own-API-key connections — Carly does this and can wire Mercury to any tool with an API.
How much does an AI automation for Mercury cost?
Carly’s AI agents start at $35/month, with non-AI workflow steps running free and unlimited. Your Mercury account and API access are separate.
More: Claude + Mercury integration · Best AI workflow automation tools · Best AI agents for productivity · Carly integrations · Best DealCloud integrations · Best Smartsheet integrations · Best Ramp integrations
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