cnpj.ai

ai.cnpjPublished by cnpj.aiOfficial publisherv0.1.1Updated Oct 24, 2026

Empresas, sócios e conexões por CNPJ. Brazilian company data, ownership and corporate networks.

VerifiedStreamable HTTPWeb executableData & AnalyticsBusiness & Commerce

Overview

AI-generated overview

Look up Brazilian company records by CNPJ, including partners and corporate connections, from an assistant.

What you can do
This remote MCP server exposes Brazilian company data keyed by CNPJ, the national company registry number. According to its description, it covers companies, partners (sócios) and connections, meaning it can surface ownership links and corporate networks between entities. No individual tools are listed in the manifest, so the exact operations are not documented here.
When to use it
Useful when an assistant needs to identify a Brazilian company, check who its partners are, or trace relationships between companies during research, due diligence or onboarding checks. It is a remote service, so it is worth adding when you want that lookup available inside your assistant rather than in a separate web tool.
Requirements
A remote MCP endpoint at over streamable HTTP. Authentication is required and uses OAuth; no environment variables or headers are declared. Network access to the provider is needed.
Before you install
The server requires OAuth sign-in, so an account or authorization with the provider is involved; review what data that grants before connecting. Queries about companies and their partners are sent to a third-party service, and results may be subject to the provider's own terms and accuracy limits. No tools are documented, so verify what the server can read or change after connecting.

Installation

In SourceWeft

  1. Open cnpj.ai in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/ai.cnpj%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "cnpj-ai": {
      "type": "http",
      "url": "https://mcp.cnpj.ai/mcp"
    }
  }
}

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v0.1.1LatestSep 16, 2026

Score

56% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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Remote MCP server for looking up Brazilian companies by CNPJ or name, with competitors, B3 market data and court publications.

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Brazil CNPJ company registry

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Queries Brazil's open CNPJ company registry: filter, count and inspect companies, partners, addresses and code tables.

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Empresas BR (CNPJ due diligence)

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Lets an assistant run Brazilian company due-diligence checks by CNPJ, covering registry data, sanctions, federal contracts and CVM records with sources.

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Cnpj Br

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Looks up Brazilian companies in the Receita Federal CNPJ registry, returning legal name, status, address, tax regime and partners.

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