Moss MCP server

What the model can do

Moss spend management: expenses (card transactions, supplier invoices, reimbursements) by type, approval status, export status and date with amounts, suppliers with payment method and terms, teams, departments, accounting dimensions with their items, and expense accounts; when you ask, can create or update suppliers (never their bank details), and create or update dimensions and dimension items. Bank details, balances, receipts and people are never read.

Reads

• moss_list_expensesMoss expenses, a page at a time: type (card transaction, invoice, reimbursement), approval status, export status, amount and home-currency amount…
• moss_list_suppliersMoss suppliers: name, supplier number (code), status, currency, default payment method, payment term, default expense account and team, and country.
• moss_list_teamsMoss teams: name, status (active or archived), department id and team lead id.
• moss_list_departmentsMoss departments: name and owner id.
• moss_list_dimensionsMoss accounting dimensions (cost centres, cost carriers, projects and so on, at most 50) with their ERP names and ids; with dimension_id…
• moss_list_expense_accountsMoss expense accounts (the ledger accounts expenses are booked to): name, code and status.

Acts, when you ask

These change something in Moss. 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.

• moss_create_supplierCreates a supplier in Moss that invoices and expenses can then be booked against…
• moss_update_supplierChanges a Moss supplier's name, code, status (DEACTIVATED stops it being used), currency, VAT id, payment method, payment term or defaults…
• moss_create_dimensionCreates an accounting dimension in Moss (a new axis such as Project or Region that expenses can be tagged with)…
• moss_update_dimensionRenames a Moss accounting dimension and/or sets its ERP name (Moss requires the ERP name on every update; pass the current one to keep it…
• moss_create_dimension_itemAdds an item (a value, such as one cost centre or project) to a Moss accounting dimension, so expenses can be booked to it.
• moss_update_dimension_itemChanges a Moss dimension item.

Connect it

First connect Moss on Dashboard → Connections, then add Memtro to your client once. The Moss 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 Moss 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 approved invoices have not been exported yet?
• › What did we spend on card transactions last month?
• › Which suppliers are paid by direct debit?
• › What items sit under the Project dimension?
• › Add a dimension item for the Northwind rollout project.

Questions

Is this an official Moss MCP server?

No. It is Memtro's MCP server with Memtro's Moss connector behind it: the connector reads Moss through its API with the credentials you connect on Dashboard → Connections, and Moss 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 Moss?

Only when you ask, and only what it has been granted: create a supplier; update or deactivate a supplier; create an accounting dimension; rename a dimension or change its ERP name; create a dimension item; rename, recode or deactivate a dimension item. 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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