Bring Tax Compliance
to Claude Desktop
Create your Vinkius account to connect Quaderno to Claude Desktop and start using all 10 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the Quaderno MCP Server?
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
Built-in capabilities (10)
Calculates applicable taxes for a potential sale
Specify email, first name, and last name. Creates a new contact in Quaderno
Provide the contact ID and a JSON array of items. Records a new transaction and issues an invoice
This action is irreversible. Deletes a contact from Quaderno
Retrieves details for a specific contact
Retrieves details for a specific invoice
Lists all contacts (customers) in the Quaderno account
Lists all issued invoices
Lists all recorded transactions
Provide a JSON payload with the changes. Updates an existing contact
Why Claude Desktop?
Claude Desktop is the definitive way to connect Quaderno to your AI workflow. Add Vinkius Edge URL to your config, restart the app, and Claude immediately exposes all 10 tools in the chat interface. ask a question, Claude calls the right tool, and you see the answer. Zero code, zero context switching.
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Claude Desktop is the reference MCP client. it was designed alongside the protocol itself, ensuring the most complete and stable MCP implementation available
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Zero-code configuration: add a server URL to a JSON file and Claude instantly discovers and exposes all available tools in the chat interface
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Claude's extended thinking capability lets it reason through multi-step tool usage, chaining multiple API calls to answer complex questions
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Enterprise-grade security with local config storage. your tokens never leave your machine, and connections go directly to Vinkius Edge network
Quaderno in Claude Desktop
Why run Quaderno with Vinkius?
The Quaderno connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 10 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.
* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.
Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect Quaderno using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
Quaderno and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect Quaderno to Claude Desktop through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
Quaderno for Claude Desktop
Every request between Claude Desktop and Quaderno is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
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.
How does Claude Desktop discover MCP tools?
When Claude Desktop starts, it reads the claude_desktop_config.json file and connects to each configured MCP server. It calls the tools/list endpoint to fetch the schema for every available tool, then surfaces them as clickable options in the chat interface via the 🔌 icon.
What happens if the MCP server is temporarily unavailable?
Claude Desktop handles disconnections gracefully. if the server is unreachable at startup, the tools simply won't appear. Once the server becomes available again, restarting Claude Desktop will re-establish the connection. There is no timeout penalty or error loop.
Can I connect multiple MCP servers simultaneously?
Yes. You can add as many servers as you need in the mcpServers section of the config file. Each server appears as a separate tool provider, and Claude can use tools from multiple servers in a single conversation turn.
Is there a limit on the number of tools per server?
Claude Desktop can handle hundreds of tools per server. However, for optimal LLM performance, Vinkius servers are designed to expose focused, well-documented tool sets rather than overwhelming the model with too many options.
Does Claude Desktop support Streamable HTTP transport?
Yes. Claude Desktop supports both SSE (Server-Sent Events) and the newer Streamable HTTP transport that Vinkius uses. Simply provide the server URL. Claude auto-negotiates the transport protocol.
Server not appearing after restart
Ensure the JSON is valid (no trailing commas). Check the file path: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\\Claude\\ (Windows).
Authentication error
Verify your Vinkius token is correct. Go to cloud.vinkius.com to regenerate it if needed.
Tools not showing in chat
Click the 🔌 icon at the bottom of the chat input. If it shows 0 tools, the server may still be connecting. wait a few seconds.
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