Run Quaderno Tax and Invoicing Through Your Muse

Through an AnythingMCP custom connector, your muse can work with your Quaderno account in plain words: work out the right tax for a sale, check a tax number, search your invoices and contacts, and prepare tax reports.

What it does

The connector adds 22 tools and connects with your account name and private API key. The muse can calculate sales tax, VAT, or GST for any location, with the rate, amount, and total, and notes such as reverse charge for a valid EU VAT number. It can check a VAT or business number against the official registry of its country, including EU VIES, the UK, Switzerland, Quebec, Australia, and New Zealand. It can search contacts, invoices, credit notes, quotes, expenses, and products. It can request a tax report for a period, check it until it is ready, and give you the download link. Creating a contact, issuing an invoice, and requesting a report are shown first. Emailing an invoice is a separate step, also shown first. The delete tool is off at install.

How to use it

1. Start an AnythingMCP account and add the Quaderno connector.
2. Sign in to Quaderno, open Profile, then API keys, and copy the private key, which starts with sk_. The publishable key does not work here.
3. Copy the account name from the same page, the part before .quadernoapp.com in your API address, and enter both only where the connector asks.
4. Run the check step to confirm the key works.
5. In Muse, open Settings, then Connectors, and add a custom connector with the address AnythingMCP gives you. Sign in, approve, then ask for a tax calculation first.

What you need

• A Muse account that can add custom connectors
• An AnythingMCP account with the Quaderno connector added
• A Quaderno account and its private API key

What to watch for

• An issued invoice is a legal tax document. Quaderno numbers it in order, and it cannot be deleted, only voided or credited in the Quaderno app. Creating an invoice does not email it, and emailed invoices cannot be unsent.
• Amounts in fields ending in _cents are in cents, so 12345 means 123.45. Read figures back before you approve.
• The connector cannot update or void invoices, record payments, or handle receipts, recurring documents, coupons, or webhooks.
• Invoices and contacts hold customer names, addresses, and tax numbers. Share them only with people who handle billing. 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.