How to Use the Correios (Brazil) MCP in Vercel AI SDK

Q: How does Correios (Brazil) stream shipping rates using Vercel AI SDK?

The server executes calculatepricedeadline inside your Edge Function. The Vercel AI SDK streams the raw JSON response chunk-by-chunk directly to your React components, letting you render pricing tables before the full LLM response completes.

Q: Can I validate Brazilian ZIP codes with Correios (Brazil) in Vercel AI SDK?

Yes, you use lookupcep to resolve address details. The Vercel AI SDK handles this tool call during the chat or generation cycle, instantly returning the structured street data to your frontend state.

Q: Does Correios (Brazil) support real-time tracking in Vercel AI SDK?

Yes, the trackobject tool fetches parcel statuses directly. You can map these live updates to a custom UI timeline within your React app using Vercel AI SDK's MCP client.

Stream real-time Correios (Brazil) shipping rates and package tracking directly to your Next.js frontend using Vercel AI SDK.

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Connect Correios (Brazil) MCP to Vercel AI SDK

Create your Vinkius account to connect Correios (Brazil) 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 Correios (Brazil) with Vercel AI SDK

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Stream live Brazilian shipping prices to your React UI

The `calculate_price_deadline` tool calculates actual shipping costs and delivery times directly within your Vercel AI SDK stream. Instead of making your users stare at a blank screen while a backend server fetches Brazilian freight rates, this tool pushes live estimates straight to their browser. Your Next.js app calls `streamText` to fetch these numbers in real-time. Because Vinkius hosts this MCP Server, your serverless functions stay lightweight and execute on the Edge without timeout risks.

Validate Brazilian CEPs instantly without page reloads

The `lookup_cep` tool resolves Brazilian postal codes to full street addresses instantly. When a user types their CEP, your Vercel AI SDK client calls this tool to auto-fill the state, city, and street names. This live lookup cuts checkout friction by preventing manual entry mistakes. The raw address payload feeds directly into your React form state, bypassing slow database roundtrips.

Build an interactive Correios tracking widget with MCP Server

The `track_object` tool pulls live shipping milestones from Correios for any tracking code. Your Vercel AI SDK UI renders these updates block-by-block as they arrive, showing customers exactly where their package sits in the Brazilian postal network. We host this MCP Server in a secure sandbox so you don't have to manage raw SOAP requests or handle Brazilian government security certs. Your frontend gets clean JSON ready for immediate rendering.

Setup guide

Set up Correios (Brazil) 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 Correios (Brazil) 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 Correios (Brazil) 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 Correios. 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 Correios (Brazil) MCP in Vercel AI SDK

The server executes `calculate_price_deadline` inside your Edge Function. The Vercel AI SDK streams the raw JSON response chunk-by-chunk directly to your React components, letting you render pricing tables before the full LLM response completes.

Yes, you use `lookup_cep` to resolve address details. The Vercel AI SDK handles this tool call during the chat or generation cycle, instantly returning the structured street data to your frontend state.

Yes, the `track_object` tool fetches parcel statuses directly. You can map these live updates to a custom UI timeline within your React app using Vercel AI SDK's MCP client.

You store your credentials securely on Vinkius. The platform injects them into the MCP Server environment, meaning your Next.js code never exposes sensitive shipping contract keys to the client side.

All Brazilian postal codes and package tracking numbers process inside an ephemeral V8 sandbox. Vinkius never logs the transit data or CEP queries, and your connection to the Correios API uses a zero-trust architecture.

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