base64_utils_dev-tools
Utilitários completos para Base64: codificar, decodificar, validar, analisar e formatar dados Base64
LABSCO SUMMARY
Fifteen utility belts, not fifteen one-shot functions.
Each tool bundles a whole family of operations behind one name, which keeps the tool list short while still covering format, validate, convert, compare and analyse for JSON, XML, HTML, Base64 and dates. The Brazilian document and accounting-period tools are the part nothing else in this category has.
What it is
A grab-bag of everyday developer utilities exposed as MCP tools, so an assistant generates test data and reformats payloads without a detour to an online converter. Each tool covers a family of operations rather than one action: the JSON tool formats, validates, diffs, minifies, extracts by JSONPath and infers a schema; the password tool generates, scores strength and checks against known breaches. Tools and their descriptions are in Portuguese, and three of them target Brazilian documents and accounting periods.
What you get
- UUIDs and hashes on demand, including version 1 with a timestamp and SHA256 of a string or a file —
gerar_uuid,gerar_hash - Email addresses generated, validated, extracted from free text, formatted and analysed for disposable domains —
email_utils - JSON formatted, validated, diffed, minified, queried by JSONPath and turned into a schema, with size statistics —
json_utils_dev-tools - XML formatted, validated, converted to and from JSON, queried by XPath, escaped, diffed and reduced to an XSD sketch —
xml_utils_dev-tools - HTML formatted, minified, validated, converted, extracted from and sanitized —
html_utils_dev-tools - Base64 encoded and decoded in bulk, URL-safe variants included, validated and wrapped at 76 characters —
base64_utils_dev-tools - Passwords generated, scored, and checked against known breaches; passphrases too —
password_utils - Test credit-card numbers generated by brand with CVV and expiry, validated, and brand-identified —
credit_card_utils - Dates and timestamps generated, validated, converted between formats, differenced, and advanced by business days —
date_utils,calcular_idade - Valid CPF and CNPJ numbers generated, validated and masked, and MM/YYYY accounting periods generated, converted and sequenced —
cpf_utils,cnpj_utils,competencia_utils - QR codes for URLs, email, phone, WiFi credentials and vCards, as PNG Base64 or SVG with a chosen error-correction level —
qr_code_utils_dev-tools
Requirements
No account and no key — everything runs locally. Node.js 20 or newer, launched with npx -y mcp-dev-tools@latest (published as mcp-dev-tools 1.8.0). JetBrains IDEs need node, npm and npx visible globally, and Windows users on WSL wrap the command in wsl. The tool descriptions the model reads are written in Portuguese, which is worth knowing before you judge how well it routes an English request.
Setup effort
One command — npx -y mcp-dev-tools@latest
USE CASES
01
Filling a test fixture with data that passes validation
Generate valid CPF and CNPJ numbers, test card numbers by brand, plausible emails and UUIDs in one pass, then have the JSON tool assemble them into the payload shape you need.
02
Making sense of a payload someone pasted at you
Format and validate it, pull the value you care about by JSONPath or XPath, and diff it against the version that used to work.
03
Checking a password before it goes into a system
Score its strength, check it against known breaches, and generate a strong replacement or a memorable passphrase if it fails.
04
Doing date arithmetic that respects business days
Validate the input format, convert between Brazilian and ISO forms, add working days rather than calendar days, and get the difference between two dates as a number you can act on.
05
Producing a QR code without a website
Generate one for a URL, an email address, a phone number, WiFi credentials or a vCard, as PNG Base64 for pasting or SVG for print.
06
Handling Brazilian accounting periods
Generate the last twelve competências, validate mixed MM/YYYY, MM/YY and YY-MM forms, convert between them, and produce the sequence between two periods.
15 tools
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
calcular_idade
Calcula idade baseada na data de nascimento
cnpj_utils
Utilitários para CNPJ: gerar, validar e formatar CNPJs brasileiros
competencia_utils
Utilitários especializados para competências MM/YYYY, MM/YY, YY-MM - Ideal para sistemas contábeis, fiscais e financeiros brasileiros
cpf_utils
Utilitários para CPF: gerar, validar e formatar CPFs brasileiros
credit_card_utils
Utilitários para cartões de crédito: gerar, validar, identificar bandeiras, formatar e analisar cartões com CVV e datas de expiração
date_utils
Utilitários completos para datas, horários e timestamps - Geração, validação, conversão, cálculos, formatação e análise
email_utils
Utilitários completos para emails: gerar, validar, extrair, analisar e formatar emails
gerar_hash
Gera hash de uma string
gerar_uuid
Gera um UUID único
html_utils_dev-tools
Utilitários completos para HTML: formatar, minificar, validar, converter, extrair, analisar, sanitizar e manipular dados HTML
json_utils_dev-tools
Utilitários completos para JSON: gerar, validar, converter, formatar, analisar e manipular dados JSON
password_utils
Utilitários para senhas: gerar, analisar segurança, validar e criar frases-senha
qr_code_utils_dev-tools
Utilidades para QR Code: gerar QR codes a partir de URLs, textos e dados diversos com diferentes formatos e configurações
xml_utils_dev-tools
Utilitários completos para XML: formatar, minificar, validar, converter, extrair, analisar e manipular dados XML
BEFORE YOU INSTALL
What to know first
Tools you get
15 tools when we connected. Five tool names end in _dev-tools, matching the server key in the example config, so those names may change with your own key.
Requires
- npx on PATH
- Node.js 20+
Where it runs
All 5 documented clients run the server on your machine.
CONTEXT COST
Moderate Standing cost
Rated by the size of the 15 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Connect your client
Server setup
TERMINAL
npx -y mcp-dev-tools@latestMCP Clients
Cursor, Augment Code, Claude Desktop
JSON
{
"mcpServers": {
"dev-tools": {
"command": "npx",
"args": [
"-y",
"mcp-dev-tools@latest"
]
}
}
}VS Code
VS CODE · JSON
{
"servers": {
"dev-tools": {
"command": "npx",
"args": [
"-y",
"mcp-dev-tools@latest"
]
}
}
}Any MCP client — WSL
ANY MCP CLIENT — WSL · JSON
{
"mcpServers": {
"dev-tools": {
"command": "wsl",
"args": [
"npx",
"-y",
"mcp-dev-tools@latest"
]
}
}
}
