Invoice spreadsheet connector for AI assistants
This is a free Model Context Protocol (MCP) server that lets an AI assistant such as Claude or ChatGPT turn the invoices in your conversation into a checked Excel workbook. The assistant reads the invoices; the connector checks the arithmetic, flags missing fields and likely duplicates, and returns an .xlsx file. There is no sign-in.
The address
https://invoicestospreadsheets.com/api/mcp
In an assistant that supports remote MCP servers, add a custom connector (some call it a custom MCP server), paste the address above and choose no authentication. Then give the assistant your invoices and ask it to put them into a spreadsheet. The server uses the streamable HTTP transport.
What it can do
| Tool | What it does |
|---|---|
create_invoice_spreadsheet | Builds an Excel workbook from the invoices the assistant has read: an Invoices sheet with one row per invoice, a Line Items sheet, a Checks sheet and totals per currency. Returns a download link that works for 24 hours. |
check_invoices | Runs the same checks without making a file: whether net plus VAT equals the total, whether line items add up to the net, which fields are missing and which invoices look like duplicates. Stores nothing. |
list_spreadsheet_templates | Lists our free blank templates for invoice tracking, self-employed expenses, landlord accounts, CIS deductions and construction or development costs, each with a direct .xlsx link. |
It does not give tax advice, file returns or make payments. The workbook uses the same columns as an export from Invoices to Spreadsheets, where the invoices are read for you in bulk and each value can be checked against the original document. What the product is and is not.
Does the connector read my invoice files?
No. The assistant reads your files and sends the connector only the details it read: suppliers, invoice numbers, dates, amounts and line items. The connector checks those details and builds the spreadsheet. How accurately the invoice was read is down to the assistant, so check the figures against your invoices.
Do I need an account?
No. The connector has no sign-in and is free to use. It accepts up to 200 invoices and 2,000 line items per spreadsheet.
How long is the spreadsheet kept?
For 24 hours, so the download link works, and then it is permanently deleted. Anyone with the link can download the file during that time. A check that makes no file stores nothing.
What does it check?
That net plus VAT equals the total, that VAT matches the stated rate, that line items add up to the invoice net, that each line is quantity times unit price, that supplier, invoice number, date, currency and total are present, that dates are not in the future, and that no two invoices share a supplier and number or a supplier, date and total.