Correios API (REST) MCP Server for LangChainGive LangChain instant access to 2 tools to Calculate Price Deadline and Track Object

Name: Correios API (REST)
Price: 29 USD
Availability: InStock
Rating: 5.0 (1 reviews)
Author: Vinkius

GDPR Free for Subscribers

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

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The Correios API (REST) MCP Server for LangChain is a standout in the Ecommerce category — giving your AI agent 2 tools to work with, ready to go from day one.

Built for AI Agents by Vinkius

Vinkius delivers Streamable HTTP and SSE to any MCP client

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+ other MCP clients

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-api-rest": {
            "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 API (REST), show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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 API (REST) MCP Server

Connect your AI agent to the Correios infrastructure to automate logistics queries in Brazil. This server provides direct access to the official REST API for real-time tracking and shipping simulations.

LangChain's ecosystem of 500+ components combines seamlessly with Correios API (REST) through native MCP adapters. Connect 2 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

Object Tracking — Get the full history of events and current status for any valid tracking code (e.g., AA123456789BR) using the track_object tool.
Shipping Calculation — Simulate prices and delivery deadlines for various services like SEDEX and PAC based on weight, dimensions, and zip codes with calculate_price_deadline.
Logistics Automation — Integrate shipping data into your e-commerce or support workflows without manual lookups.

The Correios API (REST) MCP Server exposes 2 tools through the Vinkius. Connect it to LangChain in under two minutes — credentials fully managed, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

All 2 Correios API (REST) tools available for LangChain

When LangChain connects to Correios API (REST) through Vinkius, your AI agent gets direct access to every tool listed below — spanning correios, brazil-logistics, tracking-api, and more. Every call runs in a secure, isolated environment with full audit visibility. Beyond a simple connection, you get real-time monitoring of agent activity, enterprise governance, and optimized token usage.

calculate

Calculate price deadline on Correios API (REST)

Uses POST but acts as a query. Calculate shipping price and deadline

track

Track object on Correios API (REST)

Track a postal object

Connect Correios API (REST) to LangChain via MCP

Follow these steps to wire Correios API (REST) into LangChain. The entire setup takes under two minutes — your credentials stay safe behind Vinkius.

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 2 tools from Correios API (REST) via MCP

Why Use LangChain with the Correios API (REST) MCP Server

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

The largest ecosystem of integrations, chains, and agents. combine Correios API (REST) 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 API (REST) queries for multi-turn workflows

Correios API (REST) + LangChain Use Cases

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

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

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

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

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

Example Prompts for Correios API (REST) in LangChain

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

"Track the object with code NL123456789BR."

"Calculate SEDEX shipping from 01001-000 to 22041-001 for a 500g box (20x15x10cm)."

"What is the current status of my package AA987654321BR?"

Troubleshooting Correios API (REST) MCP Server with LangChain

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

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Correios API (REST) + LangChain FAQ

Common questions about integrating Correios API (REST) 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.