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Connect Quaderno to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Handle global invoicing and customer billing directly through your AI client.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 10 capabilities

We ship only the actions that matter.

Capability set01 / 03

01-04

4 capabilities in this set.

Part of 10 available through Quaderno.

  1. 01

    Create transaction

    This capability records a new transaction and issues an invoice by providing a contact ID and a JSON array of items.

  2. 02

    Delete contact

    This capability removes a contact from your Quaderno account. This action cannot be undone.

  3. 03

    Get contact

    This capability retrieves all available details for a specific contact.

  4. 04

    List contacts

    This capability pulls a list of all customers currently in your Quaderno account.

Capability set02 / 03

05-07

3 capabilities in this set.

Part of 10 available through Quaderno.

  1. 05

    List invoices

    This capability generates a list of all invoices that have been issued.

  2. 06

    List transactions

    This capability retrieves a list of all recorded transactions.

  3. 07

    Update contact

    This capability modifies an existing contact using a JSON payload of your changes.

Capability set03 / 03

08-10

3 capabilities in this set.

Part of 10 available through Quaderno.

  1. 08

    Calculate taxes

    This capability determines the applicable taxes for a potential sale based on the customer's location.

  2. 09

    Create contact

    This capability adds a new contact to Quaderno using an email, first name, and last name.

  3. 10

    Get invoice

    This capability fetches the specific details of a single invoice.

Real work

What teams actually run

01

Global Sales Validation

Check if a specific tax rate applies to a customer in a new country before processing their order.

02

Automated Billing Support

Update a client's contact information immediately after they request a change in a support chat.

03

Developer Debugging

Verify that a transaction was recorded correctly by listing recent invoices via the agent.

04

Rapid Invoicing

Generate a new invoice for a customer by simply describing the items and prices to your AI.

Automate a task

Put Quaderno to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Quaderno works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Quaderno to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

963ms average. Fast in production.

Quaderno is checked daily against the live service.

Daily averagePeak 1362ms
Oct 3Today
Fastest day
753ms
Slowest day
1362ms
14-day trend
Slowing+8%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 10 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Quaderno, so you can see the experience inside your AI.

It does not authenticate your account with Quaderno. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Quaderno Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_umdssbzcYQjzKr8fYJQjDpa0z0BU19pItHSA2Nqi/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Quaderno capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "quaderno-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_umdssbzcYQjzKr8fYJQjDpa0z0BU19pItHSA2Nqi/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Quaderno in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Quaderno owners hand off.

This MCP is built for professionals who need to bridge the gap between automated workflows and financial compliance.

  • 01

    E-Commerce Founders

    Use the agent to check tax applicability for new global customer segments.

  • 02

    Finance Engineers

    Query invoices by contact ID while building or testing billing webhooks.

  • 03

    Client Success Managers

    Correct customer billing addresses or details mid-conversation without opening a new tab.

FAQ

Questions Quaderno owners ask.

  • 01

    How do I connect my Quaderno account?

    You need to provide your Quaderno Account API URL and your unique API Key during the setup process in Vinkius.

  • 02

    Which AI clients can use this MCP?

    This MCP works with any compatible client, including Claude, Cursor, and Windsurf.

  • 03

    Can I delete contacts through the AI?

    Yes, you can use the delete_contact capability, but be aware that this action is irreversible.

  • 04

    Does this MCP handle VAT and GST?

    Yes, the calculate_taxes capability determines the correct sales tax, VAT, or GST based on the customer's region.

  • 05

    Can I create invoices directly?

    Yes, the create_transaction capability allows you to issue invoices by providing a contact ID and a list of items.

  • 06

    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.

  • 07

    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.

  • 08

    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.

  • 09

    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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