Payhawk MCP server

What the model can do

Payhawk spend management: expenses by status, date, title or supplier with amounts, approval state and owner, one expense in detail, comments on an expense or purchase order, suppliers, purchase orders and people. When asked and granted, can comment; create, change, submit, review or delete expenses; review expense reports; block, unblock or close a card; add, change or archive suppliers; create, submit or close purchase orders; and invite or remove users.

Reads

• payhawk_list_expensesPayhawk expenses, newest created first: title, type, status, approval, paid, owner, category, supplier, total and tax with currency…
• payhawk_get_expenseOne Payhawk expense by id, with its line item count and, unless turned off, its comments.
• payhawk_list_commentsComments on one Payhawk expense or purchase order, oldest first as Payhawk returns them.
• payhawk_list_suppliersPayhawk suppliers (active by default): name, country and status.
• payhawk_list_purchase_ordersPayhawk purchase orders: number, title, status, supplier, currency, start and end dates, and when created or changed.
• payhawk_list_usersPeople in the Payhawk account: name, role and when added.

Acts, when you ask

These change something in Payhawk. The model is told to use them only when you ask for exactly that, and each one is granted by name: per team on a shared connection, by the owner on a personal one.

• payhawk_add_commentAdd a comment to a Payhawk expense or purchase order.
• payhawk_submit_expenseSubmit a Payhawk expense for approval, moving it into the account's approval workflow; its approvers may be notified (not documented).
• payhawk_update_expenseChange a draft Payhawk expense's note, supplier, category, tax rate, document number or document date; only the fields given change…
• payhawk_create_expenseCreate a Payhawk expense (bank, reimbursable or cash) owned by a named person (a user id from payhawk_list_users), optionally with a note, supplier…
• payhawk_review_expenseMark a Payhawk expense reviewed (status ready) or return it for review (status draft).
• payhawk_review_expense_reportMark a Payhawk expense report reviewed (status ready) or return it for review (status draft).
• payhawk_delete_expenseDelete a Payhawk expense; Payhawk marks it deleted and states no way to restore it.
• payhawk_set_card_statusBlock, unblock (active) or close a Payhawk card by id.
• payhawk_create_supplierAdd a supplier to Payhawk with a name and optionally a tax id, country, address and contact.
• payhawk_update_supplierChange a Payhawk supplier's name, tax id, country, address or contact; only the fields given change.
• payhawk_set_supplier_statusArchive a Payhawk supplier, or reactivate it (status active).
• payhawk_create_purchase_orderCreate a Payhawk purchase order owned by a named person (a user id from payhawk_list_users), optionally with a supplier, currency, description…
• payhawk_submit_purchase_orderSubmit a Payhawk purchase order for approval (only a draft, returned or reopened one).
• payhawk_close_purchase_orderClose an open Payhawk purchase order.
• payhawk_invite_userInvite a person to the Payhawk account by email with a role (use a role name exactly as payhawk_list_users shows them)…
• payhawk_remove_userRemove a person from the Payhawk account by user id; they lose access at once and Payhawk states no way to undo it other than inviting them again.

Connect it

First connect Payhawk on Dashboard → Connections, then add Memtro to your client once. The Payhawk tools appear alongside the tools of everything else you have connected; nothing is configured per connector.

claude plugin marketplace add memtro-org/claude-memtro
claude plugin install memtro@memtro --config api_key=sk-memtro-...

{
  "mcpServers": {
    "memtro": {
      "url": "https://platform.memtro.com/api/mcp",
      "headers": {
        "Authorization": "Bearer sk-memtro-..."
      }
    }
  }
}

{
  "mcp": {
    "memtro": {
      "type": "remote",
      "url": "https://platform.memtro.com/api/mcp",
      "headers": {
        "Authorization": "Bearer sk-memtro-..."
      }
    }
  }
}

Who may use it

The key identifies the person, and the server offers that person the tools they may use everywhere else in Memtro. A shared Payhawk connection is used by the teams an administrator granted it to, tool by tool, on the Permissions page; a personal connection is used by its owner alone, and its tools that act stay off until the owner allows them. See Teams and permissions and Connectors.

Ask it like this

• › Which expenses are waiting for approval, and who owns them?
• › What did we spend with Northwind in October?
• › Which purchase orders are still open for Brightwave Ltd?
• › Add a comment to the Acme hotel expense asking for the itemised receipt
• › Block the card Dan Fletcher reported lost this morning

Questions

Is this an official Payhawk MCP server?

No. It is Memtro's MCP server with Memtro's Payhawk connector behind it: the connector reads Payhawk through its API with the credentials you connect on Dashboard → Connections, and Payhawk publishes nothing here. The same endpoint carries every other system you connect and Memtro's memory tools.

What does it cost?

Nothing on top of Memtro. One price per organisation by its number of users, from $50 a month for up to 10 users after a 7-day free trial, with every connector, the MCP server, jobs and memory included. You bring your own model keys.

Can it change anything in Payhawk?

Only when you ask, and only what it has been granted: add a comment to an expense or purchase order; submit an expense for approval; change a draft expense's note, supplier, category, tax rate, document number or date; create a bank, reimbursable or cash expense for a person; mark an expense reviewed, or return it for review; mark an expense report reviewed, or return it for review; delete an unpaid bill, reimbursement or cash expense; block, unblock or close a card; add a supplier (no bank details); change a supplier's details (no bank details); archive or reactivate a supplier; create a purchase order, optionally with line items; submit a purchase order for approval; close a purchase order; invite a person to the Payhawk account (not as an administrator or owner); remove a person from the Payhawk account. Every other tool reads, searches or lists. An administrator grants each acting tool by name per team, and a personal connection acts only after its owner allows it.

Which clients work?

Any MCP client that speaks Streamable HTTP: Claude Code, Cursor, Claude Desktop, OpenCode, Codex, Zed, Windsurf, Cline and the Anthropic and OpenAI SDKs. There is no local process to run; the server is remote and authenticated with your key.

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