MCP For Claude Marketplace
Quaderno

Quaderno MCP Connector for Claude

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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 Jun 28, 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

  1. Subscribe to this server
  2. Authorize using your Quaderno Account API URL and unique API Key
  3. 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
tax-complianceinvoicingvat-gstbillingsales-tax

10 tools expose this connector's capabilities to your AI agent.

calculate_taxes

Calculates applicable taxes for a potential sale

create_contact

Specify email, first name, and last name. Creates a new contact in Quaderno

create_transaction

Provide the contact ID and a JSON array of items. Records a new transaction and issues an invoice

delete_contact

This action is irreversible. Deletes a contact from Quaderno

get_contact

Retrieves details for a specific contact

get_invoice

Retrieves details for a specific invoice

list_contacts

Lists all contacts (customers) in the Quaderno account

list_invoices

Lists all issued invoices

list_transactions

Lists all recorded transactions

update_contact

Provide a JSON payload with the changes. Updates an existing contact

See how to talk to your AI agent using Quaderno.

Calculate the taxes for a $150 plan sold to a user in Berlin, Germany (Postal Code 10115).

Based on Quaderno's calculation (`calculate_taxes` tool), applying the standard DE tax rate (19% VAT) to the $150 amount adds $28.50 in taxes. The final user total will be $178.50. Would you like to create a transaction with these exact amounts?

Fetch the billing details and history for contact ID #9822.

Contact #9822 is Acorn Corp (acorn-billing@example.com). They are located in NY, USA. Their VAT profile is clean. Would you like me to use `list_invoices` to find all recent transactions associated with their profile?

Update contact #9822 to change its first name to 'Acorn Group Inc'.

I've processed the `update_contact` request. The first_name field on contact #9822 has been successfully patched to 'Acorn Group Inc'. Their records are fully refreshed.

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.

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