Check Your Spending and Suppliers Through Moss and Your Muse

Through an AnythingMCP custom connector, your muse can read your Moss spending account in plain words: what the team spent, which receipts are attached, and how much is left in each wallet.

What it does

The connector adds 30 tools. Your muse can list expenses from cards, invoices, and reimbursements, with line items, amounts, expense account, VAT rate, and status. It can list files attached to an expense, such as receipts and invoice PDFs, and hand you one. It can list Moss bank accounts, called wallets, with balance and the amount still free to spend, and search transactions by date. It can read suppliers with bank details, VAT number, and payment terms, plus expense accounts, VAT rates, cost centers, users, and teams. It can create a supplier or cost center item after showing you the details. Changing a supplier is off at install. The connector cannot pay, approve, export, or delete.

How to use it

1. Sign in to Moss as an admin and open Settings, then Company Settings, then API Keys.
2. Generate an API key and confirm it in the Moss mobile app. Copy the key ID and secret key, shown once, into the AnythingMCP connector fields, never into a chat.
3. Start an AnythingMCP account and add the Moss connector.
4. In Muse, open Settings, then Connectors, and add a custom connector with the address AnythingMCP gives you. Sign in and approve.
5. Start with a read: ask for last month's unexported card transactions, with amount, supplier, and expense account.

What you need

• A Muse account that can add custom connectors
• An AnythingMCP account with the Moss connector added
• A Moss account and an admin who can create an API key and confirm it in the app

What to watch for

• The connector asks for write scope because its create tools need it. If your muse should only read, switch the create and update tools off in AnythingMCP.
• Changing a supplier can replace the bank account number Moss pays that supplier's invoices to. That tool is off at install. Turn it on only on purpose, and check old and new values first.
• Bank transactions need a booking date range, and lists return up to 100 per page, so a big month can take several calls.
• Supplier records include bank details. Keep the connector limited to people who already see those records. This is a custom connector, and Meta does not review custom connectors. You can disconnect it in Settings at any time. The muse prepares, you decide.