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Vinkius

Quaderno Connector for AI agents.

10 live capabilities

Handle global sales tax and automated invoicing from your favorite AI client.

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Why people use Quaderno

Quaderno for Automated Tax Compliance

This Connector changes that by putting your billing logic right where you work. Instead of switching between your CRM and a tax calculator, you can just tell your agent to handle it. You can check what taxes apply to a specific customer in seconds, pull up a list of all your past invoices, or update a client's billing profile while you're in the middle of a conversation. It handles the data entry and the math, so you can focus on growing the business.

  • Claude
  • ChatGPT
  • Gemini
  • Cursor
  • Visual Studio Code
  • Windsurf

What Vinkius changes

Your AI gets direct access to your billing data so you can stop manual data entry.

Use it from Claude, ChatGPT, Cursor or another AI client you already have.

One account · 5,900+ Connectors

  1. Real-world use case 01

    Checking global tax rates for a new launch

    An e-commerce founder asks their agent to check the tax for a $150 plan sold to a user in Berlin, Germany using `calculate_taxes`.

  2. Real-world use case 02

    Auditing a specific customer's history

    A finance engineer asks the agent to fetch the billing details and history for contact ID #9822 using `get_contact` and `list_invoices`.

  3. Real-world use case 03

    Fixing a typo in the CRM mid-conversation

    A client success manager tells the agent to update contact #9822 to change its first name to 'Acorn Group Inc' using `update_contact`.

Complete set · 10capabilities

The complete Quaderno capability set.

These are the exact actions your AI can choose when you ask it to work with Quaderno.

Capability set01 / 03

01—04

4 capabilities in this set.

Part of 10 available through Quaderno.

  1. 01 Capability

    Create contact

    Use this to add a new customer to your records with their email and name. It keeps your billing database organized and up to date.

  2. 02 Capability

    Calculate taxes

    This capability tells you exactly what sales tax or VAT to charge a customer based on their location. It helps you stay compliant without doing the math yourself.

  3. 03 Capability

    Create transaction

    Record a new sale and issue a professional invoice in one step. You just provide the contact ID and a list of products.

  4. 04 Capability

    Delete contact

    Remove a customer from your billing records permanently. Use this to keep your database clean of old or incorrect leads.

Capability set02 / 03

05—07

3 capabilities in this set.

Part of 10 available through Quaderno.

  1. 05 Capability

    Get contact

    Retrieve the full billing profile for a specific customer. It's the quickest way to see where a client is located and what their tax status is.

  2. 06 Capability

    Get invoice

    Pull up the details of a specific invoice for review. Use this to check payment status or verify line items for a customer.

  3. 07 Capability

    List contacts

    Get a complete list of every customer in your account. This helps you see your entire billing base at a glance.

Capability set03 / 03

08—10

3 capabilities in this set.

Part of 10 available through Quaderno.

  1. 08 Capability

    List invoices

    See a full history of every invoice you have ever issued. It's perfect for auditing your sales or checking past payments.

  2. 09 Capability

    List transactions

    Look through all your recorded sales and transactions. This gives you a clear view of your billing activity over time.

  3. 10 Capability

    Update contact

    Edit an existing customer's details like their name or billing address. Use this to keep your CRM data accurate as your clients change.

Set up in minutes

One URL. Then ask Quaderno to work.

Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use Quaderno from the conversation.

Choose your client

Live preview
Advanced clients IDE · CLI

Claude · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP
https://edge.vinkius.com/vk_preview_umdssbzcYQjzKr8fYJQjDpa0z0BU19pItHSA2Nqi/mcp
  1. Step 01

    Open Connectors

    In Claude Web or Claude Desktop, open Settings and choose Connectors.

  2. Step 02

    Add the URL

    Choose Add custom connector, name it Quaderno, and paste the URL above.

  3. Step 03

    Turn it on in chat

    Select +, open Connectors, and enable Quaderno for the conversation.

Where the request belongs

Work Quaderno can move forward.

Built around the request

This is for the e-commerce founder who is terrified of getting their taxes wrong on a global launch, the finance engineer who is tired of clicking through 15 tabs to find one invoice, and the client success manager who has to manually fix billing typos in a messy CRM.

01

E-commerce Founder

Checks tax rates for new international markets and generates invoices for global customers.

02

Finance Engineer

Audits past billing records and updates customer data via automated scripts and agent queries.

03

Client Success Manager

Corrects client billing details and retrieves payment history during live support sessions.

Build the capability set

Add more capabilities.

Each Connector adds new actions and data without changing how you work.

Browse Connectors
Finmei logo
01 12 capabilities

Finmei

Manage expenses, tax rates, and payments through conversational AI agents with Finmei.

View Connector
Evoliz logo
02 9 capabilities

Evoliz

Handle French business invoicing with quote generation, expense tracking, and accounting integrations designed for compliance.

View Connector
Alegra logo
03 10 capabilities

Alegra

Business management and e-invoicing. manage invoices, inventory, and contacts via AI.

View Connector
Altoviz logo
04 10 capabilities

Altoviz

Business management and invoicing. manage customers, invoices, and expenses via AI.

View Connector
Billit logo
05 9 capabilities

Billit

Manage your e-invoicing via Billit. list invoices, clients, and expenses directly from any AI agent.

View Connector
Avalara (AvaTax) logo
06 10 capabilities

Avalara (AvaTax)

Automate tax calculation and compliance with Avalara AvaTax. calculate rates and resolve addresses via AI.

View Connector

Bring your own AI

Change the model, client or framework. Keep Quaderno connected.

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Before you connect

Questions about Quaderno.

The practical details behind the request, access and result.

Can I use the Quaderno MCP to check VAT rates for different countries?

Yes, it can pull the correct tax rates based on a customer's location. This allows your AI agent to calculate the exact amount of VAT, GST, or sales tax for any sale instantly.

Can my AI agent create and send invoices using Quaderno?

Yes, your agent can turn a list of products and prices into a professional invoice. It handles the transaction record and the invoice generation in one step.

Does the Quaderno MCP manage my customer CRM records?

Yes, it lets you create new customer profiles, update existing contact details, and delete old records. It keeps your billing database organized and updated through your AI client.

Is the Quaderno MCP good for global e-commerce businesses?

It is specifically designed for global sales. It helps you stay compliant by handling various international tax rules and providing a unified way to manage global customer billing.

Can I pull up a specific invoice history for a client using this?

Yes, you can ask your agent to retrieve details for a specific invoice or list all invoices associated with a particular contact ID to see their full payment history.

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 capability 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.

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Give your agent a direct line to Quaderno.

Connect Quaderno once. Keep it beside 5,900+ managed Connectors when the next task needs more.

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