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dados-b3

dados-b3 is a skill for Claude Code from Val7h/dados-b3-mcp. It costs 147 tokens per session (620 once invoked), scanned A, original, MIT.

A data tool for Brazilian companies, funds, and other investments traded on B3, Brazil's stock exchange. It uses public company filings and end-of-day market prices to answer questions about performance and financial measures.

In plain words
What is it for?
Use it to examine company fundamentals, valuation ratios, dividends, total returns, real-estate funds, ETFs, BDRs, and B3 indexes.
Why use it?
It gathers related figures such as profits, debt, valuation ratios, dividends, and returns in one place. This helps when the question concerns a Brazilian ticker, fund, exchange-traded fund, or similar asset.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the dados-b3 plugin — 1 skill, 1 MCP server shipped together

not rated 0repo yesterday A scan 147 tokens original MIT

Good fit Use it to examine company fundamentals, valuation ratios, dividends, total returns, real-estate funds, ETFs, BDRs, and B3 indexes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/val7h/dados-b3-mcp/dados-b3
View source ↗ Val7h/dados-b3-mcp dadosb3.com
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Val7h/dados-b3-mcp --skill dados-b3
Clone the repo
git clone --depth 1 https://github.com/Val7h/dados-b3-mcp

Made for: Claude Code.

Or install dados-b3, the plugin that ships this one along with the rest of its 1 skill, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dados-b3

README.md
[![agentmods](https://agentmods.dev/badge/skills/val7h/dados-b3-mcp/dados-b3/github.svg)](https://agentmods.dev/skills/val7h/dados-b3-mcp/dados-b3)
Your own site
<a href="https://agentmods.dev/skills/val7h/dados-b3-mcp/dados-b3"><img src="https://agentmods.dev/badge/skills/val7h/dados-b3-mcp/dados-b3/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for dados-b3

Your own site · 80×15
<a href="https://agentmods.dev/skills/val7h/dados-b3-mcp/dados-b3"><img src="https://agentmods.dev/badge/skills/val7h/dados-b3-mcp/dados-b3.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 147 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 620 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00147 $0.00620
Opus 5.5 $0.00059 $0.00248
Sonnet 5.5 $0.00029 $0.00124
Haiku 4.5 $0.00015 $0.00062

Measured 4d ago against content hash 42764dcffa4c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dados-b3 scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/dados-b3/skills/dados-b3/SKILL.md · 32 lines

What it actually says

Dados B3

The dados-b3 MCP server answers with data from public CVM filings and B3 end-of-day prices.

When to use it

  • A question about a company listed on B3, or a ticker in the B3 format: four letters plus a digit (PETR4, VALE3, ITUB4), FIIs and ETFs ending in 11 (HGLG11, MXRF11, BOVA11), BDRs ending in 34/35 (AAPL34).
  • Fundamentals: ROE, ROIC, margins, growth, net debt/EBITDA, accounting facts with their CVM account.
  • Multiples: P/E, P/B, EV/EBITDA, priced on or after the day the filing became public.
  • Dividends ("proventos"), dividend yield, and total return ("quanto rendeu") over a period.
  • FIIs (P/VP, dividend yield, vacancy), ETFs, BDRs and B3 indices such as IBOV.

How to answer

  1. Call the matching tool. These work without a key, one ticker per call: indicadores_anuais, multiplos, fatos_contabeis, dividendos, quanto_rendeu, fii, fiis_ranking, listas, saude, metodologia. Other tools take a chave_api argument; if a tool reports that a key is needed, tell the user and point to https://dadosb3.com/conector.
  2. Always cite the dadosb3.com page link the tool returns (the url, pagina or source_url field), so the user can check the number.
  3. Say the date of the data. Prices are end-of-day, not real-time quotes: never present them as a live price.
  4. The numbers are past measurements. Do not turn them into a buy, sell or hold recommendation, and do not project future returns from them.
  5. If the tool returns no data for a ticker, say so. Do not fill the gap with numbers from memory.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 32 lines · 147 tokens per session scan A 42764dcffa4c

Subscribe to this mod's changes

dados-b3 is a skill published in the GitHub repository Val7h/dados-b3-mcp (0 stars, last pushed yesterday), licensed MIT. It adds 147 tokens to every session and 620 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-04.

Finance and fintechapib3bovespabrazilian-stockscvmfinancial-data
Related

dados-b3 compared with skills from other repositories

dados-b3 next to 6 skills from other repositories
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