How to Use the isvat MCP in Vercel AI SDK

Q: Can I use isvat to validate multiple VAT numbers in Vercel AI SDK?

You can. Use the validatemultiplevat tool to send a list of IDs. It returns the status for every number in a single operation.

Validate VAT IDs in real-time with the isvat MCP Server, streaming results directly into your Vercel AI SDK frontends.

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Connect isvat MCP to Vercel AI SDK

Create your Vinkius account to connect isvat 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 isvat with Vercel AI SDK

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Instant VAT validation for your UI

Stop making your users stare at loading spinners while your agent checks tax IDs. Use `validate_eu_vat` to pull live status updates that stream into your interface as they happen. Your application handles the data immediately. The AI client processes the returned object, letting you render tax compliance status without lag.

Batch check tax IDs with Vercel AI SDK

Need to verify a dozen vendors at once? Pass the array to `validate_multiple_vat` and let the SDK manage the flow of results as they arrive. This keeps your React or Next.js components responsive. You get the data, you display the data, and your users finish their work faster.

Monitor the VIES gateway health

Don't guess if the government database is down. Call `check_api_status` to see if the pipe is open before you even try a request. This gives your app a chance to show a polite error instead of failing silently. It's how you build reliable software that doesn't break when external services wobble.

Setup guide

Set up isvat 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 isvat 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 isvat transactions",
});

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

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by isvat. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about isvat MCP in Vercel AI SDK

Install the MCP packages and set up your client using the provided HTTP transport. Once connected, your agents can call the tools directly in your streamText functions.

Yes. Since the MCP server uses standard HTTP, your Edge Functions can talk to it without overhead. Keep your latency low and your logic at the edge.

You can. Use the `validate_multiple_vat` tool to send a list of IDs. It returns the status for every number in a single operation.

The server reports connectivity issues through standard error responses. Your code should catch these and inform the user if the VIES service is currently unreachable.

The server only processes the VAT numbers you send it. We do not store or log your tax records. Your data stays in the request-response cycle.

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