Why do I need CNAE codes?

**CNAE is mandatory** for every business operating in Brazil. It determines your tax regime (Simples Nacional, Lucro Presumido), eligible activities for MEI registration, CNPJ registration, municipal licensing, and regulatory compliance.

IBGE Economia — CNAE Activities MCP Server for LangChain 5 tools — connect in under 2 minutes

Name: IBGE Economia — CNAE Activities
Availability: InStock
Author: Vinkius

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

Built by Vinkius GDPR 5 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect IBGE Economia — CNAE Activities 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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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({
        "ibge-economia-cnae-activities": {
            "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 IBGE Economia — CNAE Activities, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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About IBGE Economia — CNAE Activities MCP Server

Give your AI agent mastery over the CNAE — Brazil's official classification of every economic activity, used for tax registration, business licensing, regulatory compliance, and market research.

LangChain's ecosystem of 500+ components combines seamlessly with IBGE Economia — CNAE Activities through native MCP adapters. Connect 5 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

21 Sections (A-U) — Top-level economic sectors: Agriculture, Mining, Manufacturing, IT, Finance, Health, etc.
87 Divisions — Drill into specific industries within each sector
285 Groups & 672 Classes — Granular business activity classification
1,332 Subclasses — The most specific activity code used on CNPJ (Brazilian business registration)

The IBGE Economia — CNAE Activities MCP Server exposes 5 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 IBGE Economia — CNAE Activities to LangChain via MCP

Follow these steps to integrate the IBGE Economia — CNAE Activities 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 5 tools from IBGE Economia — CNAE Activities via MCP

Why Use LangChain with the IBGE Economia — CNAE Activities MCP Server

LangChain provides unique advantages when paired with IBGE Economia — CNAE Activities through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine IBGE Economia — CNAE Activities 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 IBGE Economia — CNAE Activities queries for multi-turn workflows

IBGE Economia — CNAE Activities + LangChain Use Cases

Practical scenarios where LangChain combined with the IBGE Economia — CNAE Activities MCP Server delivers measurable value.

RAG with live data: combine IBGE Economia — CNAE Activities tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query IBGE Economia — CNAE Activities, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain IBGE Economia — CNAE Activities tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every IBGE Economia — CNAE Activities tool call, measure latency, and optimize your agent's performance

IBGE Economia — CNAE Activities MCP Tools for LangChain (5)

These 5 tools become available when you connect IBGE Economia — CNAE Activities to LangChain via MCP:

get_subclasse_cnae

Get CNAE subclass details

list_classes_cnae

g., 62 for IT activities). List CNAE classes within a division

list_divisoes_cnae

g., A for Agriculture, C for Manufacturing). List CNAE divisions within a section

list_secoes_cnae

List all 21 CNAE economic sections (A-U)

list_subclasses_por_classe

g., 62015). List all subclasses within a CNAE class

Example Prompts for IBGE Economia — CNAE Activities in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with IBGE Economia — CNAE Activities immediately.

"What CNAE code should I use for a software development company?"

"What economic sectors exist under section C (Manufacturing)?"

"What is CNAE subclass 4711-3/01?"

Troubleshooting IBGE Economia — CNAE Activities MCP Server with LangChain

Common issues when connecting IBGE Economia — CNAE Activities to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

IBGE Economia — CNAE Activities + LangChain FAQ

Common questions about integrating IBGE Economia — CNAE Activities 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.