When a new transaction posts on your Mercury account
Triggers on every debit or credit posting in a Mercury account.
Trigger·Transaction
Integrations · Business bankingConnect Mercury to Well
Import Mercury bank transactions and balances for real-time cash position tracking and automated matching with invoices.
What Well pulls from Mercury
Mercury feeds bank transaction, incoming wire, outgoing payment into Well as a source. The connection is read-only; disconnect at any time from your workspace settings to revoke Mercury’s access.
| From Mercury | In Well | Relation | |
|---|---|---|---|
| Bank transaction | Ledger line | Becomes | |
| Incoming wire | Customer payment | Matches | |
| Outgoing payment | Vendor expense | Categorizes as | |
| Balance | Cash position | Feeds |
- Sync mode
- MCP hybrid
- Refresh
- live + reconciliation reads
- Direction
- Mercury → Well
8 triggers from Mercury.
When a wire transfer arrives in Mercury
Captures incoming wires with originator, reference, and value date.
Trigger·TransactionWhen a wire transfer is sent from Mercury
Tracks outbound wires with beneficiary detail and instruction.
Trigger·TransactionWhen an ACH payment clears in Mercury
Picks up cleared ACH credits and debits with the company id reference.
Trigger·TransactionWhen a Mercury card charge posts
Captures debit card transactions with merchant and MCC code.
Trigger·TransactionWhen a check is deposited to Mercury
Tracks check deposits with the payer, amount, and clearing date.
Trigger·TransactionWhen a Mercury account is read
Pulls each Mercury account the workspace holds with its balance, currency, and routing details.
Trigger·AccountWhen a Mercury account's payment details are read
Resolves the account and routing numbers from the Mercury account so a payment instrument can be matched.
Trigger·Payment method
What Well does with your Mercury connection
Connect
Connect Mercury over OAuth (MCP DCR): Well registers a client through Mercury's OAuth Dynamic Client Registration and you approve on Mercury's side, so the password never reaches Well; Well holds only a scoped token it can refresh.
Sync
Well brings bank transaction, incoming wire, and outgoing payment in from Mercury through live reads, backed by a periodic reconciliation pass. The first sync backfills history in the background and the connection stays live after.
Enrich
Well resolves each Mercury entity into ledger line, customer payment, and vendor expense, assigns categories, and links every record to an audit trail across the rest of your connected tools.
Available
Your data from Mercury lands in the workspace as ledger line, customer payment, and vendor expense you can search, chart, and automate.
Questions Mercury unlocks
Ask in plain language. Well answers from your connected Mercury connection, resolved against the rest of your stack.
Ask Well
Ask anything about your Mercury connection
Summarise this month
What needs attention?
Find unmatched records
Ask about your Mercury connection…
30 agent skills run on Mercury.
Each one answers a question from live Mercury data. The required ones return nothing until a source like it is connected.
Needs a source like Mercury
Runway
Know how many months of cash you have at your current burn, with both sides of the division shown.
Cash position
Know how much cash you hold right now, with the accounts counted and the ones left out both stated.
Cost structure
See where your company's money actually goes, no spreadsheets required.
Payment and invoice lookup
Find what payment settled an invoice, or catch every payment that never got one.
Burn rate
Know what you spend in an average month over a window you can see, with the months that carried no spend counted.
Cash forecast
See the settled month-end cash series and where the line goes from the last complete month.
Cash flow bridge
See how the month moved from opening cash to closing cash, with whatever does not reconcile named as its own step.
Missing supplier invoices
See which suppliers owe you paperwork, before your accountant asks.
Assign missing invoices
Put a name on every settled expense that still has no invoice.
Missing invoice sweep
Walk the whole month-end sweep in one prompt.
Close the books
Drive the month-end close from open to sent to your accounting tool.
Categorize your suppliers
Close the category gaps behind your spend before you close a month.
Board pack
The board numbers in one pass, each with its scope and its window stated.
Subscription spend
See which suppliers you pay on a schedule, what each costs a month, and how that spend moved.
Subscription actions
Cancel a subscription, ask for a better price or contest a double debit, with your bank's facts in the email.
Unposted and blocked
See what in a month has not reached the ledger, and which pile each item sits in.
Check bank and books
Check that your bank and your books match, and re-run what missed rows.
Answers better with Mercury
FX exposure
See how much of your cash and receivables sit outside your reporting currency.
Missing receipts
Find the bills with no paperwork attached, before an auditor does.
Invoice fetching agents
See exactly which agents would run, before any of them does.
Convert currencies
Turn mixed currencies into one number you can actually audit.
Compose a board
The measures you name, arranged on one board that stores the question rather than the answer.
Call and claim
Claim a refund or a compensation with the evidence in hand, and know what to say when you call.
Money back
Find the supplier refunds and VAT credits your company is still owed, with the evidence for each.
Employer cost
Read a month of payslips, or each of several months, and state, per person, gross pay plus the employee deductions and the employer charges the payslip printed, then list the payroll related bills paid from the bank that no payslip carries.
Check contractor status
For each supplier that looks like a freelancer, read the purchase invoices, the payment rail and any contract Well holds, and state the facts a requalification question turns on, next to the papers your country expects you to keep.
Uses Mercury when it is there
Connects and checks Mercury
Connect Mercury in three steps
- 01
Connect your Mercury account
Authorize Well to access your Mercury account through the secure connection screen.
- AuthOAuth (MCP DCR)
- DiscoveryMCP .well-known
- MCP servermcp.mercury.com/mcp
- 02
Map your entities
Confirm the connection to allow Well to retrieve your accounts, transactions, and payment means.
- Mappingpreconfigured by Well
- 03
Use the data
Verify that your Mercury transactions and transfers are appearing correctly in your Well workspace.
- First syncstarts as soon as connect completes
Your Mercury credentials are never stored by Well, and all data retrieval is read-only. Mercury developer docs.
How Mercury stays secure with Well
Well connects to Mercury's MCP server (mcp.mercury.com/mcp) via the Model Context Protocol. The MCP server itself handles credential issuance through OAuth Dynamic Client Registration; Well never sees a long-lived Mercury secret. Tokens are scoped to the bank transaction, incoming wire, outgoing payment, and balance Mercury exposes and refreshed server-side. Reads only, Well cannot modify or delete Mercury records.
OAuth (MCP DCR)Encrypted at restGDPR compliant
Read the full privacy and security policyScopes Well requestsmcp.mercury.com/mcp
- granted
Read Mercury records
Resources the Mercury MCP server exposes, scoped by your OAuth approval.
- granted
Resolve bank transaction, incoming wire, outgoing payment, and balance across your stack
Match identifiers in Mercury against the same entities your other connected tools expose, so each record carries cross-tool context.
- refused
Modify or delete Mercury records
Not granted; Mercury is read-only in Well. Write-back is opt-in per connector when a write surface exists.
- refused
Store Mercury passwords or session cookies
Authentication runs through OAuth (MCP DCR) tokens we never see.
Disconnect any time from Well settings or Mercury’s admin panel.
Frequently asked questions about Mercury and Well
How does Well retrieve my Mercury transaction data?
Well connects to your Mercury account via the Mercury MCP server to pull transactions, accounts, and payment details into your workspace.
Can I send payments or upload receipts back to Mercury from Well?
No. Well reads your transaction and transfer data to build journal entries in your Well ledger, but it does not write data, send payments, or upload receipts back to Mercury.
What specific information does Well extract from my Mercury account?
Well retrieves information about your company, accounts, transactions, payment means, and the people associated with your account.
How often does Well update my Mercury transaction history?
Well syncs with Mercury in the background to ensure your workspace has the latest transactions and transfers ready for reconciliation.
Connect Mercury with
Ready-to-ship workflows that pair Mercury with another tool through Well.
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Ready to connect Mercury?
Connect once. Every bank transaction, incoming wire, outgoing payment from Mercury becomes searchable, queryable, and ready for your agents and tables. Disconnect any time.