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Brazilian stock (B3) fundamentals: ratios, multiples, dividends, scores. Public methodology.
About
Brazilian stock (B3) fundamentals: ratios, multiples, dividends, scores. Public methodology.
Remote endpoints: streamable-http: https://dadosb3.com/mcp/
Security Report
This is a well-structured MCP server for Brazilian stock market data with appropriate authentication and permission scoping. The code is clean with proper error handling, and the API key is correctly managed via environment variables. Minor quality improvements around input validation and error handling are recommended, but no security vulnerabilities were identified. Supply chain analysis found 5 known vulnerabilities in dependencies (0 critical, 5 high severity).
3 files analyzed · 9 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
Dados B3 — MCP server (Brazilian stock market, auditable fundamentals)
An MCP connector that gives your AI agent (Claude, ChatGPT, Cursor and others) access to fundamentals for Brazilian listed companies (B3) — banks and insurers included — from 2010 to today, with a fully published methodology: ROE, ROIC, margins, growth, net debt/EBITDA, point-in-time multiples (P/E, P/B, EV/EBITDA priced at the first trading session after the filing actually became public — no look-ahead, usable for backtests), dividends and dividend yield, ready-made scores (Piotroski F-Score and Graham) and a record of restated filings.
Sources: CVM open data (ODbL) and B3 (COTAHIST). Every figure carries the CVM account it came from, and nothing is published unless a suite of invariant tests passes — the balance sheet balances, the income statement reconciles, and a price never precedes the filing that justifies it.
Product and plans: https://dadosb3.com
Use 1 — remote (nothing to install, recommended)
Add this remote connector to your AI client:
https://dadosb3.com/mcp/
In Claude: Settings → Connectors → add custom connector → paste the URL.
Use 2 — local (stdio)
pip install -r requirements.txt
python server.py
{
"mcpServers": {
"dados-b3": {
"command": "python",
"args": ["server.py"],
"env": { "DADOS_B3_API_KEY": "your_optional_key" }
}
}
}
Use 3 — Docker image (one command, no local Python)
docker run -i --rm -e DADOS_B3_API_KEY=your_optional_key ghcr.io/val7h/dados-b3-mcp:latest
{
"mcpServers": {
"dados-b3": {
"command": "docker",
"args": ["run", "-i", "--rm", "ghcr.io/val7h/dados-b3-mcp:latest"]
}
}
}
The image is published on every push to main
(.github/workflows/publicar-imagem.yml). It exists for two reasons: a
one-command install path, and letting MCP directories actually run the server
in order to evaluate it.
Tools
| Tool | What it does | Free? |
|---|---|---|
listar_empresas | Every covered company (name, tax ID, ticker), banks and insurers included | yes |
indicadores_anuais | ROE, ROIC, margins, growth, net debt/EBITDA — annual series from 2010 | WEGE3 yes; others need a key |
multiplos | P/E, P/B, EV/EBITDA point-in-time; trailing P/E | WEGE3 yes; others need a key |
fatos_contabeis | Standardised accounts carrying the CVM code each figure came from | WEGE3 yes; others need a key |
dividendos | Cash distributions, annual summary and 12-month dividend yield | WEGE3 yes; others need a key |
scores | Piotroski F-Score with all nine criteria shown, plus the Graham test | WEGE3 yes; others need a key |
reapresentacoes | Restated filings — the original and the revised figure side by side | WEGE3 yes; others need a key |
screener | Filters the whole market by indicator ranges | key required |
dicionario | Formula, CVM accounts and earnings base of each indicator, as JSON | yes |
metodologia | The published methodology pages, as text | yes |
saude | Current coverage and last ingestion | yes |
WEGE3 and the whole methodology are open, no key needed. For other
companies, create a free key (200 queries/day, no card) or subscribe to
Pro at https://dadosb3.com, and pass it in the chave_api argument or the
DADOS_B3_API_KEY environment variable.
The company count is deliberately not written here: the universe grows whenever
the CVM publishes, and a number frozen in a README ages without anyone
noticing. Call saude for today's figure.
Banks and insurers
Financial institutions file under a different chart of accounts — there is no EBIT and no sales revenue. The connector classifies them by their actual chart of accounts and returns the indicators that mean something for them — ROE, margin, growth, P/E, P/B, dividends — and deliberately does not publish ROIC, EBITDA or EV/EBITDA for them, because those do not apply. Examples: Itaú, Bradesco, Banco do Brasil, BB Seguridade, IRB.
Why this one
A methodology published rather than described, invariant tests gating every release, multiples with no future information leaking in, and restatements kept on the record — when a company republishes a filing, both versions stay side by side. An honest comparison, including where competitors are better: https://dadosb3.com/comparativo
Licence
MIT (this connector). The underlying data is public (CVM/B3); the service adds standardisation, methodology and tests.
Dados B3 — servidor MCP (bolsa brasileira, fundamentos auditáveis)
Conector MCP que dá ao seu agente de IA (Claude, ChatGPT, Cursor e outros) acesso a dados fundamentalistas das companhias abertas brasileiras (B3) — inclusive bancos e seguradoras —, de 2010 até hoje, com metodologia 100% pública: ROE, ROIC, margens, crescimento, dívida líquida/EBITDA, múltiplos ponto-no-tempo (P/L, P/VP, EV/EBITDA com o preço do 1º pregão após a publicação real do balanço — sem look-ahead, próprio para backtest), dividendos e dividend yield, scores prontos (Piotroski F-Score e Graham) e histórico de reapresentações de balanço.
Fonte: CVM (dados abertos, ODbL) e B3 (COTAHIST). Cada número carrega a conta CVM de origem; nada é publicado sem uma bateria de testes de invariantes passando (o balanço fecha, a DRE fecha, o preço nunca antecede a publicação).
Produto e planos: https://dadosb3.com
Uso 1 — remoto (nada para instalar, recomendado)
Adicione este conector remoto ao seu cliente de IA:
https://dadosb3.com/mcp/
No Claude: Configurações → Conectores → adicionar conector personalizado → cole a URL.
Uso 2 — local (stdio)
pip install -r requirements.txt
python server.py
Uso 3 — imagem Docker (um comando, sem Python local)
docker run -i --rm -e DADOS_B3_API_KEY=sua_chave_opcional ghcr.io/val7h/dados-b3-mcp:latest
A imagem é publicada a cada push na main. Ela existe por dois motivos: dar um
caminho de instalação de um comando só, e permitir que diretórios de MCP rodem
o servidor para avaliá-lo.
Ferramentas
| Ferramenta | O que faz | Grátis? |
|---|---|---|
listar_empresas | Todas as companhias cobertas (nome, CNPJ, ticker), incl. bancos e seguradoras | sim |
indicadores_anuais | ROE, ROIC, margens, crescimento, DL/EBITDA — série anual desde 2010 | WEGE3 sim; demais com chave |
multiplos | P/L, P/VP, EV/EBITDA ponto-no-tempo; P/L TTM | WEGE3 sim; demais com chave |
fatos_contabeis | Contas padronizadas com a conta CVM de origem de cada número | WEGE3 sim; demais com chave |
dividendos | Proventos, resumo anual e dividend yield de 12 meses | WEGE3 sim; demais com chave |
scores | Piotroski F-Score com os nove critérios abertos, e o critério de Graham | WEGE3 sim; demais com chave |
reapresentacoes | Balanços republicados — versão original e revisada lado a lado | WEGE3 sim; demais com chave |
screener | Filtra o mercado inteiro por faixas de indicadores | exige chave |
dicionario | Fórmula, contas CVM e base do lucro de cada indicador, em JSON | sim |
metodologia | As páginas de metodologia publicadas, em texto | sim |
saude | Cobertura atual e última ingestão | sim |
A empresa WEGE3 e a metodologia são abertas para degustação, sem chave.
Para as demais, crie uma chave grátis (200 consultas/dia, sem cartão) ou
assine o Pro em https://dadosb3.com e passe a chave no argumento
chave_api (ou na variável DADOS_B3_API_KEY).
A contagem de empresas não fica escrita aqui de propósito: o universo cresce
quando a CVM publica, e um número congelado num README envelheceria sem
ninguém ver. Para o número de hoje, chame saude.
Bancos e seguradoras
Instituições financeiras têm plano de contas próprio (não há EBIT nem receita de venda). O conector as classifica pelo plano de contas real e entrega os indicadores que fazem sentido — ROE, margem, crescimento, P/L, P/VP, dividendos — e não publica ROIC/EBITDA/EV-EBITDA para elas (não se aplicam). Ex.: Itaú, Bradesco, Banco do Brasil, BB Seguridade, IRB.
Por que este e não outro
Metodologia 100% pública, testes de invariantes antes de cada publicação, múltiplos sem vazamento de informação futura, e histórico de reapresentações registrado. Comparativo honesto, inclusive onde os concorrentes são melhores: https://dadosb3.com/comparativo
Licença
MIT (este conector). Os dados são públicos (CVM/B3); o serviço adiciona padronização, metodologia e testes.
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