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Quaderno MCP Server

Name: Quaderno
Availability: InStock
Author: Vinkius

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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.

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What is the Quaderno MCP Server?

The Quaderno MCP Server gives AI agents like Claude, ChatGPT, and Cursor direct access to Quaderno via 10 tools. Bring automated tax compliance and invoicing directly into your AI workflow — calculate global taxes, issue invoices, and manage CRM contacts in seconds. Powered by the Vinkius - no API keys, no infrastructure, connect in under 2 minutes.

Built-in capabilities (10)

calculate_taxescreate_contactcreate_transactiondelete_contactget_contactget_invoicelist_contactslist_invoiceslist_transactionsupdate_contact

Tools for your AI Agents to operate Quaderno

Ask your AI agent "Calculate the taxes for a $150 plan sold to a user in Berlin, Germany (Postal Code 10115)." and get the answer without opening a single dashboard. With 10 tools connected to real Quaderno data, your agents reason over live information, cross-reference it with other MCP servers, and deliver insights you would spend hours assembling manually.

Works with Claude, ChatGPT, Cursor, and any MCP-compatible client. Powered by the Vinkius - your credentials never touch the AI model, every request is auditable. Connect in under two minutes.

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Quaderno MCP Server capabilities

10 tools

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

What the Quaderno MCP Server unlocks

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

Frequently asked questions about the Quaderno MCP Server

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.