Mercury's official MCP server (Beta) for read-only access to your Mercury business banking data — accounts, balances, transactions, cards, recipients, statements, and treasury. Cannot initiate transactions or modify account data; all mutations are blocked server-side.
1Open Slashspace and go to Settings, then Connectors.
2On Discover, search for Mercury MCP and click Connect.
3Sign in to Mercury MCP in your browser. Slashspace updates when the account is connected.
Then ask for what you need in any Agent mode chat. Mercury MCP is on in every chat unless you switch it off.
What your chats can do
30 tools from Mercury MCP.
Getaccount
Get account by ID
Getaccountcards
Retrieve all debit and credit cards associated with a specific account.
Getaccounts
Retrieve a paginated list of accounts. Supports cursor-based pagination with limit, order, start_after, and end_before query parameters.
Getaccountstatements
Retrieve a paginated list of monthly statements for a specific account. Supports cursor-based pagination with limit, order, start_after, and end_before query parameters, as well as date range filtering with start and end parameters.
Getattachment
Retrieve attachment details including download URL
GetcurrentdateGet the current date in the format. Example: Fri Oct 31 2025
Getcustomer
Retrieve details of a specific customer by their ID
Getinvoice
Retrieve details of an invoice by its ID
Getorganization
Retrieve information about your organization including EIN, legal business name, and DBAs.
Getrecipient
Retrieve details of a specific recipient by ID
Getrecipients
Retrieve a paginated list of all recipients. Use cursor parameters (start_after, end_before) for pagination.
Getsaferequest
Retrieve a specific SAFE request by its ID.
Getsaferequests
Retrieve all SAFE (Simple Agreement for Future Equity) requests for your organization.
Gettransaction
Get transaction by ID
Gettransactionbyid
Retrieve a single transaction by its ID. Returns full transaction details including attachments, check images, and related metadata.
Gettreasury
Retrieve a paginated list of all treasury accounts associated with the authenticated organization. Use cursor parameters (start_after, end_before) for pagination.
Gettreasurystatements
Retrieve a paginated list of statements for a specific treasury account. Supports cursor-based pagination and filtering by document type.
Gettreasurytransactions
Retrieve paginated treasury transactions for a specific treasury account.
Getuser
Get user by ID
Getusers
Get all users
Getwebhook
Retrieve details of a specific webhook endpoint by ID
Getwebhooks
Retrieve a paginated list of all webhook endpoints for your organization. Supports filtering by status.
Listcategories
Retrieve a paginated list of all available custom expense categories for the organization. Supports cursor-based pagination with limit, order, start_after, and end_before query parameters.
- These categories are custom and different from the values for "mercuryCategory".
Listcredit
Retrieve a list of all credit accounts for the organization.
Listcustomers
Retrieve a paginated list of customers. Supports cursor-based pagination with limit, order, start_after, and end_before query parameters.
Listinvoiceattachments
Retrieve a list of all attachments for a specific invoice
Listinvoices
Retrieve a paginated list of invoices. Supports cursor-based pagination with limit, order, start_after, and end_before query parameters.
Listrecipientsattachments
Retrieve a paginated list of all recipient tax form attachments across all recipients in the organization. Use cursor parameters (start_after, end_before) for pagination.
Listsendmoneyapprovalrequests
Retrieve a paginated list of send money approval requests for the authenticated organization. Supports filtering by account and status.
Listtransactions
Retrieve a paginated list of all transactions across all accounts. Supports advanced filtering by date ranges, status, categories, and cursor-based pagination.
CRITICAL TRUNCATION RULE - READ THIS FIRST:
================================================================================
IF YOU SEE "Result too long" IN THE RESPONSE:
1. IMMEDIATELY STOP - Do not analyze or use the truncated data
2. The data is INCOMPLETE and any analysis will be WRONG
3. Start over with a smaller limit (reduce by 50%)
4. Paginate through ALL pages until you have complete data
5. NEVER provide answers based on truncated results
================================================================================
MANDATORY PAGINATION FOR COMPLETE RESULTS:
When a user asks ANY question requiring complete data (totals, balances, aggregates,
"most/least", "all transactions", comparisons, or any calculation across transactions):
CRITICAL: Incomplete pagination will produce WRONG ANSWERS for questions about totals,
spending categories, balances, minimums, maximums, or "most/least". You must fetch everything
before calculating or answering.
1. Start with a limit of 300 transactions.
2. You MUST automatically paginate through ALL pages WITHOUT asking the user
3. Continue calling listTransactions using the page.nextPage value from each response
4. Keep fetching until page.nextPage is not present
5. If pagination would take more than 3 tool calls, ask the user to narrow down to a smaller time period
6. It is a CRITICAL ERROR to answer before having fetched ALL pages
FILTERING:
- IMPORTANT: WHEN FILTERING BY DATE, ALWAYS CHECK THE CURRENT DATE FIRST and ensure you're using the current year for current year queries
- Unless specified otherwise or queried for "all transactions", ONLY include transactions with "status: sent"
- To get transactions for a specific account, use the accountId parameter to filter by accountId
PAGINATION MECHANICS:
- Use the limit parameter to control page size
- If page.nextPage is returned, use it as the start_after parameter in your next call
- Keep fetching until page.nextPage is null/undefined
- The page.nextPage value is a transaction ID to start after (exclusive)
COMPUTATIONAL REQUIREMENTS:
- For any query requiring:
- Sums, totals, averages, medians, modes, ranges, most/least, or other aggregations across accounts/transactions
- Calculations involving currency amounts
- Comparisons of financial metrics
- You MUST:
- Create an artifact that processes the data programmatically
- Parse the JSON response and use JavaScript/Python to calculate
- Display intermediate steps for verification
- Never rely on mental arithmetic for financial calculations
- Example: "What's my total balance?"
- CORRECT: Create artifact that parses accounts, maps to balances, uses reduce() to sum
- INCORRECT: Manually adding up balance values
For queries about 'last two months' or 'this year', calculate dates based on the actual current date
Use the getCurrentDate tool to get the current date.
Use the getTransaction tool to get more details about a specific transaction.
