MCP server

Brazil CNPJ company registry

io.github.bnovarini/cnpj-mcp

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Brazil's open CNPJ registry: filter and count companies by sector, place, size, MEI, partners.

Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

8

Token cost

About 3,380 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http cnpj-mcp https://cnpj-mcp.fly.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.cnpj-mcp]
url = "https://cnpj-mcp.fly.dev/mcp"

Gemini CLI

{"mcpServers":{"cnpj-mcp":{"httpUrl":"https://cnpj-mcp.fly.dev/mcp"}}}

Cursor

{"mcpServers":{"cnpj-mcp":{"url":"https://cnpj-mcp.fly.dev/mcp"}}}

VS Code

{"servers":{"cnpj-mcp":{"type":"http","url":"https://cnpj-mcp.fly.dev/mcp"}}}

Antigravity

agy mcp add cnpj-mcp https://cnpj-mcp.fly.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"cnpj-mcp","server_url":"https://cnpj-mcp.fly.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"cnpj-mcp","server_url":"https://cnpj-mcp.fly.dev/mcp"}

Tools

• companies_at_address ~275 tokens
  Establishments registered at one address, by CEP (8 digits), optionally narrowed by street text, number, municipio or uf. Use it to find companies sharing an address.
• count_companies ~1079 tokens
  Count companies or establishments, optionally grouped by one or two fields. Filters (all optional, combined with AND): cnae (CNAE code or prefix, e.g. '4711' or '47', list ok; add include_secondary to also match secondary activities), cnae_secao (letter A-U), uf, municipio (name as in Receita, accen
• dataset_info ~71 tokens
  What data is loaded: source, snapshot month, row counts, field meanings and caveats. Call first if unsure what the tools cover.
• get_company ~122 tokens
  One company by CNPJ (14 digits, with or without punctuation; or the 8-digit root to get the matriz): registration, company data, Simples/MEI, address and contacts, secondary CNAEs, partners (with names), and how many establishments the company has.
• list_partners ~132 tokens
  Partners (socios) of one company by CNPJ root or full CNPJ: names, type, role (qualificacao), entry date, age band. CPFs are masked by Receita. faixa_etaria: 1 = 0-12, 2 = 13-20, 3 = 21-30, 4 = 31-40, 5 = 41-50, 6 = 51-60, 7 = 61-70, 8 = 71-80, 9 = over 80, 0 = not applicable.
• lookup_codes ~159 tokens
  Look up Receita's code tables by text or code. kind: cnae (activity), natureza_juridica (legal form), municipio, motivo (reason for status), qualificacao (partner role), pais. Use it to find the CNAE code for a sector, or the municipio name Receita uses, before filtering.
• search_companies ~1280 tokens
  Find companies/establishments matching filters. Filters (all optional, combined with AND): cnae (CNAE code or prefix, e.g. '4711' or '47', list ok; add include_secondary to also match secondary activities), cnae_secao (letter A-U), uf, municipio (name as in Receita, accents ignored), municipio_codig
• search_partners ~262 tokens
  Find the companies a person or entity is a partner of, by name. Exact (accent-insensitive, case-insensitive) match on the partner name by default; set contains=true for a substring match (uf required). Optionally narrow with cpf_middle (the 6 digits Receita publishes, e.g. '240659') because the same

Browse

• GitHub tools
• Company data
• Legal research
• GitHub and code hosting

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