How to Use the VATNode MCP in Vercel AI SDK

Q: Can I use VATNode's rate lookup with Vercel AI SDK?

Yep. You can stream results from getcountryvatrates using the Vercel AI SDK. This is perfect for building interactive tax calculators where the rate updates instantly as the user changes countries.

Q: Does VATNode support multiple countries via Vercel AI SDK?

Yes. You can call listallvatrates and then selectively use other tools like getcountrytaxinfo. The Vercel AI SDK handles the streaming of these multi-step results into your frontend.

Show users live VAT validation data using Vercel AI SDK.

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Connect VATNode MCP to Vercel AI SDK

Create your Vinkius account to connect VATNode to Vercel AI SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup VATNode with Vercel AI SDK

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Claude

Perplexity

Check API usage stats instantly.

See exactly how much of your allocated quota you've used by calling `get_api_usage`. This keeps the user informed about rate limits right on the frontend. Streaming this data means users don't wait for a full page refresh. They see the usage metrics appear in real-time as the AI processes the request.

Verify VAT numbers and get company details.

Use `validate_vat_number` to check if an input is valid, retrieving core company metadata immediately. If it passes validation, you can then follow up with `get_company_by_vat` to pull richer profile information. This real-time data flow makes the user experience smooth. The client sees the validation status appear live as soon as the background process completes.

Audit tax rates for specific countries.

Need current VAT rules? Call `get_country_vat_rates` and pass in the country code to pull the exact percentage. This is essential when building user-facing accounting tools. The results stream right into your React component, letting the end user see the applicable tax rate without delay or a clunky loading spinner.

Setup guide

Set up VATNode MCP in Vercel AI SDK

Prerequisites

Node.js 18+ and a TypeScript project
ai + @modelcontextprotocol/sdk packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies

Run npm install ai @modelcontextprotocol/sdk plus your preferred model provider (e.g. @ai-sdk/openai).
2

Create the Streamable HTTP transport

Use StreamableHTTPClientTransport with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and use tools

Call mcpClient.tools() to auto-discover all VATNode tools. Pass them directly to generateText() or streamText() — no manual schema definitions needed.
4

Works with any model provider

Swap openai("gpt-4o") for any AI SDK provider — Anthropic, Google, Mistral. The MCP tools work identically across all supported models.

index.ts

import { experimental_createMCPClient as createMCPClient } from "ai";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";

const transport = new StreamableHTTPClientTransport(
  new URL("https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")
);

const mcpClient = await createMCPClient({ transport });
const tools = await mcpClient.tools();

const { text } = await generateText({
  model: openai("gpt-4o"),
  tools,
  prompt: "List recent VATNode transactions",
});

console.log(text);
await mcpClient.close();

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Common questions about VATNode MCP in Vercel AI SDK

The Vercel AI SDK streams MCP tool results directly into the UI. When you call a VATNode function, the user sees the result appear live, rather than having to wait for a full API response.

Yep. You can stream results from `get_country_vat_rates` using the Vercel AI SDK. This is perfect for building interactive tax calculators where the rate updates instantly as the user changes countries.

This server touches sensitive company and tax data, including country codes and VAT numbers. When using it with the Vercel AI SDK, you're dealing with streamed financial audit information.

Yes. You can call `list_all_vat_rates` and then selectively use other tools like `get_country_tax_info`. The Vercel AI SDK handles the streaming of these multi-step results into your frontend.

The Vercel AI SDK allows you to manage authentication. Since this server deals with company metadata and tax rates, make sure your authProvider handles secure endpoint token management.

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