Where do I find my Quaderno API Key and URL?

Log in to your Quaderno account. Your **API URL** is simply your domain up top in the browser bar (e.g., `https://mycompany.quadernoapp.com`). To get the **API Key**, navigate to **Settings** > **API Keys** (or Developers), and copy your private key. Do not share this key as it carries full access. Paste both credentials below.

Can it calculate exact taxes dynamically before a sale?

Yes! Use the `calculate_taxes` tool and just provide the AI with a country code, postal code, and base amount. Quaderno's world-class engine evaluates real-time location-based tax nuances (VAT, GST) and returns the exact fraction needed.

Can I draft custom test invoices natively in chat?

Absolutely. You can use `create_transaction`. Instruct your agent to format a JSON array with products and amounts, linking to a specific `contact_id`. The server submits this array to Quaderno and records the fully realized transaction safely.

Will deleting a contact via the AI remove them permanently?

Yes. The `delete_contact` operation relies heavily on standard destructive API instructions. Running this means the contact is gone entirely from the Quaderno dashboard. Always review deletion queries cautiously before approving execution.

Quaderno MCP Connector for Claude

A+

Bring automated tax compliance and invoicing directly into your AI workflow — calculate global taxes, issue invoices, and manage CRM contacts in seconds.

10 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

Connect your Quaderno account to any AI agent and bring powerful tax compliance, invoicing, and customer management capabilities directly into your automated workflows.

What you can do

Tax Calculations on the Fly — Instantly determine the accurate sales tax, VAT, or GST based on the customer's region and amount before finalizing sales logic
Invoice Management — Search and retrieve generated invoices, audit billing records, and verify transactions perfectly formatted via intelligent prompts
Generate Transactions — Transact and issue invoices seamlessly by sending a simple JSON array of itemized products and line item prices
Full Contact CRM — Map your users fully by creating, modifying, retrieving, and safely deleting user contacts and billing profiles natively

How it works

Subscribe to this server
Authorize using your Quaderno Account API URL and unique API Key
Start querying customer billing and global taxes from Claude, Cursor, or any MCP-compatible wrapper

Who is this for?

E-Commerce Founders — prompt your AI to check what taxes apply to a specific customer base during a new global promotion launch
Finance Engineers — instantly look up invoices by contact ID while coding billing webhooks, avoiding dashboard fatigue
Client Success Managers — edit a mispelled client billing address rapidly mid-conversation before generating a new transaction record

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