Yes. According to Mercury's developer documentation (2026), Mercury publishes its own official MCP server, so a compatible AI assistant can connect directly to your Mercury business banking data through OAuth, including a read-only access option. That's a real, provider-native connection, not a workaround. What it doesn't do is pull in anything outside Mercury. If your money also sits at other banks, brokerages, or crypto exchanges, Truthifi is the complement that brings those connected accounts into one view for an MCP-capable assistant.

What Mercury does

Mercury is a business banking fintech built for startups and small businesses, offering banking services through partner banks rather than as a chartered bank itself. Businesses use Mercury at mercury.com for day-to-day accounts, payments, and related treasury functions. It's a provider account for a company's operating finances, not a personal consumer bank.

Does Mercury have an MCP server or API?

Mercury has both, and the MCP server is the headline fact here.

MCP server. According to Mercury's documentation at docs.mercury.com/reference/mcp, Mercury runs an official Model Context Protocol server at mcp.mercury.com, currently in Beta. It authenticates over OAuth and exposes business-banking account data to a connected AI assistant. Mercury's MCP server supports a read-only access option, so a business can grant an assistant visibility into its Mercury accounts without granting the ability to move money, if that's the mode chosen during setup.

API. Separately, according to Mercury's API reference, Mercury offers a public REST API at api.mercury.com/api/v1, authenticated with a Bearer API token. The API covers accounts, transactions, and recipients, and it also supports a read-only token option for integrations that only need to read data rather than act on it.

Endpoints, scopes, and setup screens can change, so treat Mercury's own docs as the source of truth and confirm these details there before you connect.

One detail worth knowing: as Mercury documents them, the MCP server and the API use separate mechanisms (OAuth for MCP, a Bearer token for the API). A read-only choice in one likely doesn't carry over to the other, so a team running both should check each permission on its own.

Scope matters here. Both the MCP server and the API cover Mercury's own business-banking accounts: what's inside Mercury. Neither one reaches outside Mercury into your other banks, brokerages, or crypto holdings. If your business or your own finances span more than Mercury, that's a gap an assistant using only Mercury's MCP server won't close on its own.

How to connect Mercury to an AI assistant today

1. Confirm MCP support. Confirm your AI assistant supports MCP connections.

2. Review Mercury's MCP docs. Go to docs.mercury.com/reference/mcp and review setup instructions for Mercury's MCP server at mcp.mercury.com.

3. Choose access level. Choose a read-only option during setup if you don't want the assistant able to initiate actions.

4. Complete OAuth authorization. Complete the OAuth flow Mercury presents, granting access to the specific account or accounts.

5. Test the connection. Run a simple query in your assistant to confirm it retrieves current Mercury data.

6. Add other accounts via Truthifi. Connect your other accounts to Truthifi, read-only, so the assistant has one connected picture beyond Mercury alone.

What You Can Ask

With Mercury's own MCP server connected, you could ask an assistant things like:

• "What's the current balance across my Mercury accounts?"

• "List recent transactions on my Mercury account."

• "Who are the recipients I've paid recently through Mercury?"

These are the kinds of questions Mercury's MCP server and API are built to answer: direct, in-scope lookups of Mercury's own banking data.

Mercury money is company money, and that shapes how you should phrase broader questions. If you later connect personal accounts through Truthifi, tell the assistant which accounts belong to the business and which are yours. Otherwise a "total cash" answer can blend company runway with personal savings.

With & Without Truthifi

For a finance lead at a startup whose operating cash lives entirely in Mercury, the Mercury connection alone may be enough. For a founder whose company cash sits in Mercury while personal savings, brokerage, or crypto sit elsewhere, it covers only part of the picture.

Without Truthifi: Your AI assistant, connected only to Mercury's MCP server, can see your Mercury business banking accounts: balances, transactions, recipients. It cannot see your personal bank accounts, a separate business brokerage account, a crypto exchange balance, or anything held outside Mercury. Ask it for your whole financial picture and it can only answer for the slice that lives in Mercury.

With Truthifi: You connect your other bank, brokerage, and crypto accounts to Truthifi, read-only, through Plaid, Yodlee, or By All Accounts, alongside Mercury's own MCP connection. Now your assistant can reason across everything you've connected, not just Mercury, while Mercury's own server keeps handling what it already does well inside Mercury itself.

How Truthifi Can Help

Mercury's server is built for one job: Mercury's own accounts. Truthifi picks up where that job ends. According to Truthifi platform data (2026), Truthifi connects to 18,000+ financial institutions through Plaid, Yodlee and By All Accounts and monitors $6B+ in assets. That gives your AI assistant read-only visibility into your other bank, brokerage, and crypto accounts alongside what you've already connected through Mercury directly.

Per Truthifi platform data, Truthifi runs 130+ automated diagnostics on a connected account, with an accuracy figure of 99.7%. Paid Monitoring plans unlock fee breakdowns, benchmarks, concentration and exposure views, and AI/MCP access, so the assistant looking at your whole picture has more than raw balances to reason with. To get there, start free, connect your non-Mercury accounts read-only, and move to a Monitoring plan when you want your assistant to reach them over MCP.

Security here is structural rather than a guarantee: connections are read-only, and you can remove an assistant's access through Connections → Agents → ⋯ → Revoke.

Whether Mercury itself can be bridged into Truthifi as an aggregated account depends on whether it fits an aggregatable account type. Most consumer bank, brokerage, and crypto accounts can be aggregated this way; enterprise SaaS platforms, advisor-only tools, credit bureaus, and pure data vendors generally cannot. Check Truthifi's current connection list for Mercury's aggregation status before assuming it will appear there alongside your other linked accounts.

Truthifi is not an investment adviser and doesn't give investment, tax or legal advice.

FAQ

Does Mercury have an official MCP server? Yes. Mercury publishes an official MCP server (currently in Beta) at mcp.mercury.com, documented at docs.mercury.com/reference/mcp, with OAuth-based access to business-banking account data and a read-only option.

Can I use Mercury's MCP server with a read-only setup? Yes. Mercury's MCP server supports a read-only access option, and its REST API separately supports a read-only token, for integrations that should only read data, not initiate actions.

Does Mercury's MCP server show my accounts outside Mercury? No. Mercury's MCP server and API cover Mercury's own business-banking accounts only. It doesn't reach your other banks, brokerages, or crypto holdings.

Can I connect my Mercury account through Truthifi too? That depends on whether Mercury fits an aggregatable account type Truthifi supports. Check Truthifi's current connection list to confirm Mercury's aggregation status rather than assuming either way.

What does Truthifi add if Mercury already has its own MCP server? Truthifi adds the accounts Mercury's MCP server can't see: your other banks, brokerages, and crypto accounts, read-only, so your AI assistant can reason across your whole financial picture rather than Mercury's slice of it alone.

Read Next

• All provider MCP guides

• Is Plaid safe? A guide to how account aggregation works

• Is Yodlee safe? A guide to how account aggregation works

• What Truthifi's 130+ checks actually look for in a connected account

Start Free on Truthifi

See exactly what's in your accounts — connect free and run 130+ checks. Start free on Truthifi, link your non-Mercury accounts read-only, and upgrade to Monitoring when you want AI/MCP access.

Once both connections are live, try a question neither source can answer alone: how many months of company spending your Mercury balance covers, set beside the personal cash you hold elsewhere.