IBGE Brasil MCP

IBGE Brasil MCP Server

Live, exact Brazilian public data for your AI assistant — with provenance, not guesswork.

Ask an LLM "what was Belo Horizonte's population in the 2022 Census?" and you get a plausible number from its training data: maybe right, maybe outdated, with no source. ibge-br-mcp instead has your assistant query the official IBGE APIs in real time — returning the exact figure together with the table and period it came from.

🇧🇷 Leia em Português

This server implements the Model Context Protocol (MCP) to give AI assistants live, structured access to Brazil's public geographic, demographic, economic, and health data — sourced from the IBGE APIs (including health indicators served through IBGE's SIDRA system).

See it in action

Ask your assistant, in English or Portuguese:

• "What was Belo Horizonte's population in the 2022 Census?" → ibge_cidades / ibge_censo
• "List the municipalities of Espírito Santo." → ibge_municipios
• "Compare GDP across the Southeast state capitals." → ibge_comparar

The answers come live from the official IBGE APIs — exact figures with the table and period they came from, not numbers guessed from training data.

Want to see a whole analysis rather than a single answer? The end-to-end demo works one real question — which state grew most between the 2010 and 2022 Censuses, and what drove it — from first call to conclusion, with every figure as it came back. The practical examples are seven shorter recipes, including ranking all 5,570 municipalities in a single call.

Features

• 21 specialized tools covering all major IBGE data domains
• Provenance block on every response — source, canonical URL, reference period, real extraction timestamp, ready-to-use citation, and legal regime (see Data provenance)
• Reference resources & analysis prompts (MCP catalogs + ready-made templates)
• 565 automated tests — 88% overall coverage, 92% across the tools
• Automatic caching with configurable TTL for optimal performance
• Retry mechanism with exponential backoff for network resilience
• Comprehensive validation for all input parameters
• Standardized error handling with helpful suggestions
• Full TypeScript support with strict typing

📖 Article (in Portuguese): Como achar a tabela certa no SIDRA — e como saber que é a certa — finding the right SIDRA table, the metadata that settles it, a full worked example on 2022 Census data, and the four traps that cost the most.

Data provenance

Since v3.3.0 every successful tool response carries a provenance block (portfolio contract v1.0), so each number is citable, auditable, and reproducible. The block is emitted on three channels:

1. structuredContent.provenance (parseable, visible to the model) — exactly six keys: source (the IBGE API queried), source_url (canonical URL that reproduces the query), data_vintage (reference period when the source exposes one; null otherwise), retrieved_at (the REAL upstream extraction instant, preserved across cache hits, Brasília time), citation ("Fonte: IBGE — [pesquisa/tabela], [URL], extraído em [data]."), and license — plus attribution, the canonical list of source URLs.
2. _meta under br.com.sidneybissoli.ibge/provenance and .../attribution (out-of-band mirror for audit/UI, zero model tokens).
3. A compact text footer appended to the Markdown, for text-only clients.

The IBGE APIs declare no license of their own; the legal regime is Brazil's open-data framework — Lei 12.527/2011 (LAI) and Decreto 8.777/2016 (unrestricted reuse, free use, obligation limited to crediting the source). Statistics-mode responses (estatisticas=true) and ibge_comparar are marked derived with an explanatory note in the canonical block, since the aggregates are computed server-side from the raw IBGE values.

Available Tools

Localities & Geography

Tool	Description
ibge_estados	List Brazilian states with region filtering
ibge_municipios	List municipalities by state or search by name
ibge_localidade	Get details of a locality by IBGE code
ibge_geocodigo	Decode IBGE codes or search codes by name
ibge_vizinhos	Find neighboring municipalities

Statistical Data (SIDRA)

Tool	Description
ibge_sidra	Query SIDRA tables (Census, PNAD, GDP, etc.)
ibge_sidra_tabelas	List and search available SIDRA tables
ibge_sidra_metadados	Get table metadata (variables, periods, levels)
ibge_pesquisas	List IBGE research surveys and their tables

Economic & Social Indicators

Tool	Description
ibge_indicadores	Economic and social indicators (GDP, IPCA, unemployment)
ibge_censo	Census data (1970-2022) with 16 themes
ibge_comparar	Compare indicators across localities with rankings

Municipal Data (Cidades@)

Tool	Description
ibge_cidades	Municipal indicators (population, HDI, GDP per capita, etc.)

International Data

Tool	Description
ibge_paises	Country data following UN M49 methodology

Demographics

Tool	Description
ibge_nomes	Name frequency and rankings in Brazil

Classifications

Tool	Description
ibge_cnae	CNAE (National Classification of Economic Activities)

Maps & Geographic Meshes

Tool	Description
ibge_malhas	Geographic meshes (GeoJSON, TopoJSON, SVG)
ibge_malhas_tema	Thematic meshes (biomes, Legal Amazon, semi-arid)

Health

Tool	Description
ibge_datasaude	Health indicators via IBGE's SIDRA

News & Calendar

Tool	Description
ibge_noticias	IBGE news and press releases
ibge_calendario	IBGE release and collection calendar

Which tool should I use?

With 21 tools, several can touch the same topic. Quick guide for the common overlaps:

Population & demographics

You want…	Use
A single municipality/state panel (population, HDI, GDP…)	ibge_cidades
Census data or historical series (1970–2022)	ibge_censo
Rank/compare 2–10 localities on one indicator	ibge_comparar
A macro indicator time series (GDP, IPCA, unemployment…)	ibge_indicadores
A specific SIDRA table / fine control	ibge_sidra
The largest/smallest/mean/median across a whole table	ibge_sidra/ibge_censo/ibge_indicadores/ibge_datasaude with estatisticas=true

Economic indicators

You want…	Use
IPCA, INPC, GDP, unemployment (IBGE, primary source)	ibge_indicadores

Localities & codes

You want…	Use
List/search municipalities	ibge_municipios
List states	ibge_estados
Resolve a name→code at any level, or decode a code's structure	ibge_geocodigo
Full record of one locality you already have the code for	ibge_localidade
Neighboring municipalities	ibge_vizinhos

SIDRA workflow

Discover → inspect → query: ibge_pesquisas / ibge_sidra_tabelas (find a table) → ibge_sidra_metadados (its structure) → ibge_sidra (query). For common data, the wrappers above (ibge_censo, ibge_indicadores, ibge_comparar, ibge_cidades) are usually easier.

Maps (meshes)

You want…	Use
Administrative outlines (Brazil/region/state/municipality)	ibge_malhas
Thematic areas (biomes, Legal Amazon, semi-arid, metro regions)	ibge_malhas_tema

Installation

Prerequisites

• Node.js 22.x or higher (engines.node)
• npm or yarn

From npm (recommended)

npm install -g ibge-br-mcp

From source

# Clone the repository
git clone https://github.com/SidneyBissoli/ibge-br-mcp.git
cd ibge-br-mcp

# Install dependencies
npm install

# Build the project
npm run build

Configuration

Claude Desktop

Add to your Claude Desktop configuration file (claude_desktop_config.json):

{
  "mcpServers": {
    "ibge-br-mcp": {
      "command": "npx",
      "args": ["-y", "ibge-br-mcp"]
    }
  }
}

Or if installed from source:

{
  "mcpServers": {
    "ibge-br-mcp": {
      "command": "node",
      "args": ["/path/to/ibge-br-mcp/dist/index.js"]
    }
  }
}

Claude Code

{
  "mcpServers": {
    "ibge-br-mcp": {
      "command": "npx",
      "args": ["-y", "ibge-br-mcp"]
    }
  }
}

Tool Usage Examples

ibge_estados

List all Brazilian states.

# List all states
ibge_estados

# States in Northeast region
ibge_estados(regiao="NE")

# States sorted by abbreviation
ibge_estados(ordenar="sigla")

ibge_municipios

List Brazilian municipalities.

# Municipalities of São Paulo state
ibge_municipios(uf="SP")

# Search municipalities by name
ibge_municipios(busca="Campinas")

# Municipalities in MG containing "Belo"
ibge_municipios(uf="MG", busca="Belo")

ibge_cidades

Query municipal indicators (similar to Cidades@ portal).

# Panorama of São Paulo
ibge_cidades(tipo="panorama", municipio="3550308")

# Population history
ibge_cidades(tipo="historico", municipio="3550308", indicador="populacao")

# List available research
ibge_cidades(tipo="pesquisas")

Available indicators: populacao, area, densidade, pib_per_capita, idh, escolarizacao, mortalidade, salario_medio, receitas, despesas

ibge_paises

Query international country data.

# List all countries
ibge_paises(tipo="listar")

# Brazil details
ibge_paises(tipo="detalhes", pais="BR")

# Search countries
ibge_paises(tipo="buscar", busca="Argentina")

# Countries in Americas
ibge_paises(tipo="listar", regiao="americas")

Regions: americas, europa, africa, asia, oceania

ibge_sidra

Query SIDRA tables (IBGE's Automatic Recovery System).

# Brazil population in 2023
ibge_sidra(tabela="6579", periodos="2023")

# Population by state
ibge_sidra(tabela="6579", nivel_territorial="3", periodos="2023")

# Census 2022 for São Paulo municipality
ibge_sidra(tabela="9514", nivel_territorial="6", localidades="3550308")

Common tables:

Code	Description
6579	Population estimates (annual)
9514	Census 2022 population
4714	Unemployment rate (PNAD)
6706	GDP at current prices

Territorial levels:

Code	Level
1	Brazil
2	Region (North, Northeast, etc.)
3	State (UF)
6	Municipality
7	Metropolitan Region
106	Health Region
127	Legal Amazon
128	Semi-arid

Statistics mode (also on ibge_censo, ibge_indicadores, ibge_datasaude): for largest/smallest/mean/median/distribution/ranking questions, pass estatisticas=true — the server computes the full distribution (min/max/mean/ median/std-dev/labeled percentiles) over all rows before pagination and returns top/bottom rankings (topN, default 10). agruparPor="<column label>" ranks groups by descending sum, each with its own mini-distribution.

# Which state has the largest estimated population?
ibge_sidra(tabela="6579", nivel_territorial="3", estatisticas=true)

# Census 2022 population distribution grouped by state
ibge_censo(ano="2022", tema="populacao", nivel_territorial="3", estatisticas=true, agruparPor="Unidade da Federação")

ibge_censo

Query Census data (1970-2022).

# Population Census 2022
ibge_censo(ano="2022", tema="populacao")

# Historical population series
ibge_censo(ano="todos", tema="populacao")

# Literacy by state in 2010
ibge_censo(ano="2010", tema="alfabetizacao", nivel_territorial="3")

Available themes: populacao, alfabetizacao, domicilios, idade_sexo, religiao, cor_raca, rendimento, migracao, educacao, trabalho

ibge_indicadores

Query economic and social indicators.

# GDP
ibge_indicadores(indicador="pib")

# IPCA last 12 months
ibge_indicadores(indicador="ipca", periodos="last 12")

# Unemployment by state
ibge_indicadores(indicador="desemprego", nivel_territorial="3")

# List all indicators
ibge_indicadores(indicador="listar")

Available indicators:

Category	Indicators
Economic	pib, pib_variacao, pib_per_capita, industria, comercio, servicos
Prices	ipca, ipca_acumulado, inpc
Labor	desemprego, ocupacao, rendimento, informalidade
Population	populacao, densidade
Agriculture	agricultura, pecuaria

ibge_nomes

Query name frequency and rankings.

# Frequency of "Maria"
ibge_nomes(tipo="frequencia", nomes="Maria")

# Compare names
ibge_nomes(tipo="frequencia", nomes="João,José,Pedro")

# Ranking of names in 2000s
ibge_nomes(tipo="ranking", decada=2000)

# Female names ranking
ibge_nomes(tipo="ranking", sexo="F")

ibge_malhas

Get geographic meshes (maps).

# Brazil with states
ibge_malhas(localidade="BR", resolucao="2")

# São Paulo with municipalities
ibge_malhas(localidade="SP", resolucao="5")

# Specific municipality
ibge_malhas(localidade="3550308")

# SVG format
ibge_malhas(localidade="BR", formato="svg")

Resolution levels:

Value	Internal Divisions
0	No divisions (outline only)
2	States
5	Municipalities

ibge_datasaude

Query Brazilian health indicators served through IBGE's SIDRA (some originally produced by DataSUS, e.g. mortality and births).

# Infant mortality in Brazil
ibge_datasaude(indicador="mortalidade_infantil")

# Life expectancy by state
ibge_datasaude(indicador="esperanca_vida", nivel_territorial="3")

# List indicators
ibge_datasaude(indicador="listar")

Available indicators: mortalidade_infantil, esperanca_vida, nascidos_vivos, obitos, fecundidade, saneamento_agua, saneamento_esgoto, plano_saude

APIs Used

IBGE APIs

• Localities: servicodados.ibge.gov.br/api/v1/localidades
• Names: servicodados.ibge.gov.br/api/v2/censos/nomes
• Aggregates/SIDRA: servicodados.ibge.gov.br/api/v3/agregados
• SIDRA API: apisidra.ibge.gov.br/values
• Meshes: servicodados.ibge.gov.br/api/v3/malhas
• News: servicodados.ibge.gov.br/api/v3/noticias
• Population: servicodados.ibge.gov.br/api/v1/projecoes/populacao
• CNAE: servicodados.ibge.gov.br/api/v2/cnae
• Calendar: servicodados.ibge.gov.br/api/v3/calendario
• Countries: servicodados.ibge.gov.br/api/v1/paises
• Research: servicodados.ibge.gov.br/api/v1/pesquisas

Development

# Build
npm run build

# Watch mode
npm run watch

# Run tests
npm test

# Run tests in watch mode
npm run test:watch

# Lint
npm run lint

# Format
npm run format

# Test with MCP inspector
npm run inspector

Project Structure

ibge-br-mcp/
├── src/
│   ├── index.ts              # Main MCP server
│   ├── types.ts              # TypeScript types
│   ├── config.ts             # Configuration and constants
│   ├── cache.ts              # Request caching system
│   ├── retry.ts              # Retry with exponential backoff
│   ├── errors.ts             # Standardized error handling
│   ├── validation.ts         # Input validation helpers
│   ├── metrics.ts            # Metrics and logging
│   ├── utils/
│   │   └── formatters.ts     # Formatting utilities
│   └── tools/
│       ├── index.ts          # Tool exports
│       ├── estados.ts        # ibge_estados
│       ├── municipios.ts     # ibge_municipios
│       ├── localidade.ts     # ibge_localidade
│       ├── geocodigo.ts      # ibge_geocodigo
│       ├── censo.ts          # ibge_censo
│       ├── sidra.ts          # ibge_sidra
│       ├── sidra-tabelas.ts  # ibge_sidra_tabelas
│       ├── sidra-metadados.ts# ibge_sidra_metadados
│       ├── indicadores.ts    # ibge_indicadores
│       ├── cnae.ts           # ibge_cnae
│       ├── calendario.ts     # ibge_calendario
│       ├── comparar.ts       # ibge_comparar
│       ├── malhas.ts         # ibge_malhas
│       ├── malhas-tema.ts    # ibge_malhas_tema
│       ├── vizinhos.ts       # ibge_vizinhos
│       ├── datasaude.ts      # ibge_datasaude
│       ├── pesquisas.ts      # ibge_pesquisas
│       ├── nomes.ts          # ibge_nomes
│       ├── noticias.ts       # ibge_noticias
│       ├── paises.ts         # ibge_paises
│       └── cidades.ts        # ibge_cidades
├── tests/                    # Test files
├── dist/                     # Compiled files
├── package.json
├── tsconfig.json
├── vitest.config.ts
└── README.md

Testing

The project includes a comprehensive test suite with 565 tests covering:

• Validation functions
• Retry mechanism
• Formatting utilities
• Error handling
• Cache operations
• Integration tests with mocks

npm test

Quality Assurance

This project maintains high code quality standards:

• 565 automated tests covering validation, caching, retry logic, formatting, and integrations
• 88% overall test coverage — cache and validation modules above 97%
• ESLint for code linting with zero warnings
• Prettier for consistent code formatting
• TypeScript strict mode for type safety
• Automated CI/CD via GitHub Actions

Run tests locally:

# Run all tests
npm test

# Run tests with coverage
npm run test:coverage

# Run linter
npm run lint

License

MIT

Author

Sidney da Silva Pereira Bissoli

References

• IBGE - Data Service
• SIDRA - IBGE Automatic Recovery System
• Model Context Protocol
• MCP TypeScript SDK