# Mercury MCP: Use Mercury in Slack and Email

Source: https://maito.app/integrations/mercury

Connect the Mercury MCP server to Maito with one sign-in, and your whole team can use it from Slack or email: “What's our cash balance across all Mercury accounts today?”

Mercury is business banking: accounts, balances, and transactions. Connect the Mercury MCP server to Maito once, and everyone on your team can use Mercury from Slack, by email, or from Claude, ChatGPT, Cursor, Codex, Grok or Muse. Nobody else has to sign in.

-   Connects in one click
-   Sign in with Mercury
-   One connection for the whole team
-   Server by [Mercury](https://mercury.com/)

Updated October 21, 2026

## What you can ask with Mercury

Requests to Maito

![Dana](https://maito.app/marketing-avatars/dana.webp)

Dana in Slack

What's our cash balance across all Mercury accounts today?

![Sam](https://maito.app/marketing-avatars/sam.webp)

Sam by email

How much did we pay AWS over the last six months?

Maito uses Mercury to do the work and replies where you asked.

## How to connect Mercury

Open Connections in your workspace and choose Connect next to Mercury. You sign in to Mercury in a new tab, and that's the whole setup. Name the account and choose Workspace under who can use it. That's the only time anyone signs in: your whole team, shared chats and Loops can use Mercury from then on. Or skip ahead and ask for the work: Maito sends you a link if Mercury isn't connected yet.

## Questions

### What is the Mercury MCP server URL?

Mercury publishes it at https://mcp.mercury.com/mcp, and it signs in with OAuth, so there's no key to copy.

### Can I use the Mercury MCP server from Slack?

Yes. Connect it to Maito once, then mention Maito in any Slack channel or send it a direct message. The same connection works by email and from Claude, ChatGPT, Cursor, Codex, Grok or Muse.

### Does everyone on my team have to connect Mercury?

No. One person connects it once and chooses Workspace. Then everyone in the workspace, shared chats and Loops can use Mercury, without signing in themselves. Choose Only me instead to keep it to your own chats.

### Do I have to connect Mercury before I ask?

No. If a request needs Mercury and it isn't connected yet, your agent sends you a link. Connect it, and the work picks up where it stopped.

### Can I limit what Maito does in Mercury?

Yes. After you connect, turn off any Mercury tools you don't want Maito to use, such as the ones that change data. Tools Mercury adds later stay off until you turn them on.

## Also in Payments and finance

-   [Stripe Stripe handles payments, customers, subscriptions and invoices.](https://maito.app/integrations/stripe)
-   [Ramp Ramp is corporate cards and spend management.](https://maito.app/integrations/ramp)
-   [PayPal PayPal handles payments, invoices and transactions.](https://maito.app/integrations/paypal)
-   [Era Era helps you manage personal finances: accounts, spending, and budgets.](https://maito.app/integrations/era-context)
-   [Square Square handles payments and point of sale, with transaction and merchant data.](https://maito.app/integrations/square)
-   [Paddle Paddle handles billing for software companies: customers, subscriptions, transactions and revenue.](https://maito.app/integrations/paddle)

[See all integrations](https://maito.app/integrations)

## Put your AI employee to work.

Set it up in minutes. Connect Mercury, then hand Maito the first job.

[Put Maito to work](https://maito.app/login?returnTo=%2Fintegrations%2Fmercury)[Book a demo](https://cal.com/ddubovetzky/chat-with-the-founder)