Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Brazilayer: Brazilian Public Data
Overview
Description from the maker (original English)
Brazilian company registry (CNPJ), sanctions, funds & market data for AI agents, paid via x402.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs on your computer
- Transport: stdio
- Category: Other
- You need to fill in: BRAZILAYER_PRIVATE_KEY
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- You fill in yourself:
BRAZILAYER_PRIVATE_KEY
Values marked secret are keys to your account. Never share them or paste them into a chat.
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Download the maker’s .mcpb file
The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.
Run this in your terminal
Fill in the empty values before running it.
Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
Values you fill in
- Private key (0x…) of the wallet that pays for calls (USDC on Base). Optional: without it, only the free sample tools work.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account brazilayer, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- – Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Otheri
- More stars than 0% of the other 32700 servers in this category
- Published to the registry more recently than 94% of the other 32700 servers in this category
- Basic checks equal to or better than 100% of the other 32700 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Brazilayer: Brazilian Public Data safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
You need to fill in: BRAZILAYER_PRIVATE_KEY
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.16.0) reached the registry 2 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need MCPB on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Agent Data Tools: Utilities
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated 2 days ago
Install
Agent Data Tools: Utilities
by Nutshell2000
103 tools: JSON repair, CSV, hashes, cron, dates, units, validators. 25 free calls.
Runs in the cloudUpdated today
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Brazilayer MCP server
Official Brazilian public data for AI agents, paid per call in USDC on Base through the x402 protocol. No account and no API key: the server pays each call from a wallet you configure, and the free tools work without one.
- API reference and prices: https://api.brazilayer.com/docs
- Website: https://www.brazilayer.com
- Listed in the MCP Registry as
io.github.brazilayer/mcp, and on PayAPI Market
Tools
| Family | Tools | What they return |
|---|---|---|
| Company registry (CNPJ) | cnpj_situacao, cnpj_consultar_empresa, cnpj_listar_socios, cnpj_consultar_empresa_completo, cnpj_buscar_empresas, cnpj_buscar_por_socio | Receita Federal registry: status, activities, address, partners, branches; search by name, place, activity or partner |
| Sanctions | integridade_consultar | CEIS, CNEP, CEPIM, the slave-labour list and leniency agreements, in one call |
| Government contracts | licitacoes_contratos_fornecedor, licitacoes_oportunidades_abertas | Contracts won by a company and tenders open now, from the national procurement portal (PNCP) |
| Central Bank | bcb_verificar_instituicao | Whether a company is an authorized financial institution, with its verified domains |
| Enrichment | empresa_enriquecer | Registry, partners, branches, sanctions, Central Bank and contracts in one call |
| Market | mercado_noticias, mercado_indicadores, mercado_cambio, mercado_pacote | News with sentiment every 15 minutes; Selic, IPCA, PTAX and Focus; the BRL crypto premium |
| Commodities | commodities_clima, commodities_fogo, commodities_exportacoes, commodities_hidrologia, commodities_briefing, commodities_pacote | Rain and frost risk in the crop belts, fire hotspots, exports, reservoirs and a daily briefing |
| Investment funds (CVM) | fundos_fluxos, fundos_verificar, fundos_ranking, fundos_carteira, fundos_movimentacoes | Daily flows by class, fund registration, rankings, holdings and institutional flow per stock |
| Tax reform | tributos_ncm, tributos_busca, tributos_calendario | IBS/CBS treatment by NCM code, reduced and zero rates, the transition calendar |
| Deforestation (EUDR) | desmatamento_municipio, desmatamento_fornecedor, desmatamento_ranking | INPE DETER alerts by municipality, exposure of a supplier, rankings |
| Causal chains | cadeia_causal | An upstream indicator with its lead time, the current state and a reading |
| Bundle | brasil_pacote | The 13 endpoints that need no parameter, in one call |
| Free samples | *_obter_amostra (one per family) | The response format of each family, without payment |
| Trust checks (free) | trust_check, skill_check | The public ratings of the Agent Economy Report for an x402 service or an agent skill, before you pay or install |
Install
Claude Desktop. Download brazilayer-mcp.mcpb from the latest release and open it. The installer asks for the wallet key, which is optional.
Claude Code, from source:
git clone https://github.com/brazilayer/mcp && cd mcp && npm installclaude mcp add brazilayer -e BRAZILAYER_PRIVATE_KEY=0xYOUR_KEY -- npx tsx "$PWD/servidor.ts"
Other MCP clients (Cursor and others), after the same git clone and npm install:
{"mcpServers": { "brazilayer": { "command": "npx", "args": ["tsx", "/path/to/mcp/servidor.ts"], "env": { "BRAZILAYER_PRIVATE_KEY": "0xYOUR_KEY" } } } }
Configuration
BRAZILAYER_PRIVATE_KEY(optional): private key (0x…) of the wallet that pays for calls. It needs USDC on Base. Without it the free tools work, and the paid ones explain the 402 they received.BRAZILAYER_API_URL(optional): defaults tohttps://api.brazilayer.com.
The key signs real payments. Use a dedicated wallet with a small balance.
License
MIT