How to Use the IBGE Economia — CNAE Activities MCP in Vercel AI SDK

Stream live Brazilian business classifications directly into your Next.js frontend with Vercel AI SDK and this MCP Server.

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Connect IBGE Economia — CNAE Activities MCP to Vercel AI SDK

Create your Vinkius account to connect IBGE Economia — CNAE Activities 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 IBGE Economia — CNAE Activities with Vercel AI SDK

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Map economic sectors in real-time

The `list_secoes_cnae` tool pulls all 21 core economic sectors from Brazil's IBGE database directly into your React components. By calling this tool, your AI client displays top-level divisions without making users wait for a full page reload. Users get immediate feedback because the Vercel AI SDK streams the raw JSON payloads straight to the client. This means you can build dynamic tax dropdowns that populate as the user types, completely bypassing slow backend middleware.

Stream subclass details directly to UI

The `get_subclasse_cnae` tool fetches the granular details of any specific Brazilian activity code. When your AI client executes this tool, the Vercel AI SDK pushes the resulting compliance metadata straight into your live chat interface. Edge functions handle the heavy lifting, keeping your app fast and responsive. You don't need to write custom API routes to bridge the gap between the IBGE registry and your frontend interface.

Resolve CNAE hierarchies with Vercel AI SDK

The `list_classes_cnae` tool exposes the nested structure of Brazil's business classification framework. It lets your agent drill down from broad sectors to specific tax brackets within a single streaming session. This MCP Server integration allows you to build a complete search experience by combining it with `list_divisoes_cnae` and `list_subclasses_por_classe`. Your users can find their exact corporate tax codes without clicking through endless government portals.

Setup guide

Set up IBGE Economia — CNAE Activities 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 IBGE Economia — CNAE Activities 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 IBGE Economia — CNAE Activities transactions",
});

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

Get your connection token →

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Common questions about IBGE Economia — CNAE Activities MCP in Vercel AI SDK

Use the standard error handling callbacks inside the streamText function. If a call to get_subclasse_cnae fails due to an invalid code, your frontend can catch the exception and prompt the user to correct their input immediately.

Yes. The MCP Server runs in a secure sandbox, allowing your edge-deployed Vercel AI SDK code to fetch data from list_secoes_cnae with minimal latency. This setup avoids cold starts and keeps your Brazilian compliance tools fast.

It does not. Because the Vercel AI SDK supports progressive rendering, tools like list_subclasses_por_classe stream their results as they arrive, keeping your interface interactive.

Pass the connection URL to the createMCPClient helper. The SDK manages the underlying HTTP transport, making the IBGE tools instantly available to your model.

Absolutely. The server only processes public CNAE codes and taxonomy names, never storing or transmitting your private corporate tax returns or proprietary business data.

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