Brazilian Sanctions MCP Server

An MCP (Model Context Protocol) server that provides access to Brazilian sanctions databases through the Porta da Transparência API.

Components

• mcp_server.py - MCP server exposing Brazilian sanctions search tools

• main.py - AI chatbot using LangChain with Ollama for natural language queries

Related MCP server: mcp-brasil

Features

• Search across 5 Brazilian sanctions registers

• Extract specific fields from API responses (names, sanctioning authorities, dates, locations)

• Check if sanctions are still active based on end dates

• Get comprehensive overview with maximum information from all registers

• A simple Natural language interface via AI chatbot (only for tests)

• Search by CNPJ, CPF, or company name

• Detailed sanction information including reasons, dates, and agencies

• Secure API key authentication

• Async-compatible tool execution

Sanctions Registers Supported

Important: Name search is only available for Leniency Agreements. The other registers (CNEP, CEIS, CEPIM, CEAF) only support CNPJ/CPF searches due to API limitations.

API Key Configuration

An API key is REQUIRED to use this system.

Get your API key:

1. Visit: https://www.portaldatransparencia.gov.br/ (Brazilian CPF is required)

2. Login or create an account

3. Go to "Minha Conta" → "API Keys" or "Desenvolvedor"

4. Generate a new API key

5. Copy the key (format: abcd1234efgh5678ijkl9012)

Setup:

Create .env file in project root:

PORTAL_TRANSPARENCIA_API_KEY=your_key_here

SECURITY: Never commit your API key to version control!

Usage

Running the MCP Server

The MCP server can be run standalone or used by MCP clients:

python mcp_server.py

OR

To use in Claude or Desktop/Code directly use

\BrazillianSanctions.json

Running the Chatbot (The chatbot it's just for test, make sure to setup the MCP server into a real AML Agentic AI enviroment to proper use)

The chatbot provides a natural language interface to query sanctions databases:

python main.py

Example queries:

• "Need to know if 30.477.220/0001-71 is sanctioned by Brazil and if yes why?"

• "Search for Petrobras in leniency agreements"

• "Check if company with CNPJ 11222333000181 has any sanctions"

MCP Server Tools

The MCP server exposes the following tools:

Search Tools

• search_cnep - Search CNEP (National Register of Punishments) by CNPJ, CPF, agency, or date range

• search_cepim - Search CEPIM (Register of Sanctioned Public Employees) by CNPJ, CPF, or superior agency

• search_ceis - Search CEIS (Register of Ineligible Entities) by CNPJ, CPF, agency, or date range

• search_ceaf - Search CEAF (Ineligibility Register of Public Servants) by CPF, agency, or date range

• search_acordos_leniencia - Search Leniency Agreements by name, CNPJ, status, or date range

• search_all_registers - Search all registers for a given CNPJ or CPF

Analysis Tools

• check_sanction_status - Check if an entity is still sanctioned across all registers based on end dates

• get_sanctioning_authorities - Get information about who sanctioned the entity (sanctioning agencies)

• get_location_info - Get location/state information (UF, agency location) for sanctioned entities

• get_comprehensive_overview - Get comprehensive overview with maximum information from all registers including names, authorities, dates, location, and status

Utility Tools

• get_sanction_details - Get detailed information about a specific sanction register type

• check_entity_sanctions - Complete sanctions check for an entity across all registers

• batch_search - Search multiple documents (CNPJs or CPFs) in one operation

• generate_sanctions_report - Generate a formatted text report from multiple search results

Chatbot Demo

I'm testing with a local chatbot based in Ollama but the MCP as you know can be plugged to any Agentic AI:

• LLM: Ollama with qwen3:8b model

• Agent: LangChain create_agent with tool calling

• Tools: Custom LangChain tools wrapping the sanctions API

Architecture

User Query (Natural Language)
    ↓
LangChain Agent (Ollama)
    ↓
Tool Selection & Execution
    ↓
MCP Tools / Direct API Calls
    ↓
Brazilian Sanctions API
    ↓
Detailed Sanction Information
    ↓
Natural Language Response

Document Formatting

The system automatically cleans document numbers(Brazilian CPNJ or CPF). Both formatted and unformatted documents work:

# These are equivalent:
"12.345.678/0001-00"
"123456780001000"
"123.456.789-66"
"12345678966"

Error Handling

The system includes comprehensive error handling:

• API connection errors

• Invalid document formats

• Missing API keys

• Rate limiting

• Malformed responses

Troubleshooting

References

• API Documentation: https://api.portaldatransparencia.gov.br/swagger-ui/index.html

• Porta da Transparência: https://www.portaldatransparencia.gov.br/

• MCP Protocol: https://modelcontextprotocol.io/

• LangChain: https://python.langchain.com/

• Ollama: https://ollama.ai/

Last Updated: June 2026 API Base URL: https://api.portaldatransparencia.gov.br/api-de-dados