Can my AI automatically track a package just by providing the tracking code?

Yes! Use the `track_object` tool with the tracking code (e.g., 'QI123456789BR'). Your agent will retrieve the current status, location, and the full history of logistics events.

How do I calculate shipping prices for PAC or SEDEX?

Use the `calculate_shipping` tool with the origin and destination CEPs, along with the weight and dimensions of the package. The agent will return the estimated price and delivery deadline.

Can I retrieve the full address details from a zip code (CEP)?

Yes! The `search_cep` tool allows your agent to fetch the street name, neighborhood, city, and state associated with any valid Brazilian zip code.

Correios (Brazil) MCP Server for LangChain 8 tools — connect in under 2 minutes

Name: Correios (Brazil)
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 8 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Correios (Brazil) through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "correios-brazil": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Correios (Brazil), show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Correios (Brazil) MCP Server

Connect your AI agents to Correios, the official national postal service of Brazil. This MCP provides 9 tools to automate real-time object tracking, calculate shipping deadlines and prices (PAC, SEDEX), and retrieve accurate address information using Brazilian zip codes (CEP) directly through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Correios (Brazil) through native MCP adapters. Connect 8 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

What you can do

Logistics Orchestration — Track multiple packages and retrieve granular status updates and historical events
Shipping Intelligence — Calculate delivery deadlines and prices for various services between any two zip codes
Address Validation — Retrieve complete street, neighborhood, and city details for any Brazilian CEP
Business Integration — Access organizational contract configurations and list authorized service codes programmatically
Regional Insights — Verify the state and city information associated with specific postal zones

The Correios (Brazil) MCP Server exposes 8 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Correios (Brazil) to LangChain via MCP

Follow these steps to integrate the Correios (Brazil) MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 8 tools from Correios (Brazil) via MCP

Why Use LangChain with the Correios (Brazil) MCP Server

LangChain provides unique advantages when paired with Correios (Brazil) through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Correios (Brazil) MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Correios (Brazil) queries for multi-turn workflows

Correios (Brazil) + LangChain Use Cases

Practical scenarios where LangChain combined with the Correios (Brazil) MCP Server delivers measurable value.

RAG with live data: combine Correios (Brazil) tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Correios (Brazil), synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Correios (Brazil) tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Correios (Brazil) tool call, measure latency, and optimize your agent's performance

Correios (Brazil) MCP Tools for LangChain (8)

These 8 tools become available when you connect Correios (Brazil) to LangChain via MCP:

calculate_price_deadline

Calculate shipping price and delivery deadline

get_contract_status

Check the current status of your Correios contract

get_unit_info

Get details for a specific post office unit

list_contract_services

, associated with your account. List all postage services available in your contract

list_unit_types

List all types of Correios units

lookup_cep

Get address information from a Brazilian ZIP code (CEP)

search_units_by_cep

Search for nearby post office units

track_object

Track a package status using its tracking code

Example Prompts for Correios (Brazil) in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Correios (Brazil) immediately.

"Track Correios object 'QI123456789BR' and show its latest status."

"Calculate shipping for a 2kg box from CEP 01310-100 to 20040-002."

"Find the address details for CEP '01310-914'."

Troubleshooting Correios (Brazil) MCP Server with LangChain

Common issues when connecting Correios (Brazil) to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Correios (Brazil) + LangChain FAQ

Common questions about integrating Correios (Brazil) MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.