cnpj.ai MCP server

cnpj.ai is the official remote MCP server from cnpj.ai. It answers at https://mcp.cnpj.ai/mcp over streamable HTTP and asks you to sign in with your cnpj.ai account before it lists its tools, so your client opens a login the first time it connects. Our probes reached it 7 of 7 times since 7 September 2026; the last check, on 17 October 2026, got the sign-in challenge, so it is up.

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

Description as the publisher wrote it.

What cnpj.ai needs before it works

A sign-in. The server refused to list its tools to an anonymous client and answered with an authentication challenge, which is how an MCP server protected by OAuth behaves. Add it with one of the setups below; the first connection opens a login for your cnpj.ai account, and the tools appear once you have approved it.

Add cnpj.ai to your AI client

Every block below points at https://mcp.cnpj.ai/mcp. Pick your client and copy.

claude mcp add --transport http cnpj-ai https://mcp.cnpj.ai/mcp

{
  "mcpServers": {
    "cnpj-ai": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.cnpj.ai/mcp"]
    }
  }
}

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

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

{
  "context_servers": {
    "cnpj-ai": {
      "url": "https://mcp.cnpj.ai/mcp"
    }
  }
}

{
  "mcpServers": {
    "cnpj-ai": {
      "serverUrl": "https://mcp.cnpj.ai/mcp"
    }
  }
}

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

name: cnpj.ai
version: 0.0.1
schema: v1
mcpServers:
  - name: cnpj.ai
    type: streamable-http
    url: https://mcp.cnpj.ai/mcp

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

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

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

goose://extension?url=https%3A%2F%2Fmcp.cnpj.ai%2Fmcp&type=streamable_http&id=cnpj-ai&name=cnpj.ai

Is cnpj.ai up right now?

It answered our last check on 17 October 2026 in 192 ms. Over 7 checks since 7 September 2026 it answered 7. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to cnpj.ai

Questions about cnpj.ai

Is there an official cnpj.ai MCP server?

Yes. It is published by cnpj.ai and served from mcp.cnpj.ai, the vendor's own domain: https://mcp.cnpj.ai/mcp.

How do I sign in to cnpj.ai?

Add the server with a setup above. The first time your client connects it opens the sign-in page for cnpj.ai; approve it and the tools load.

Is cnpj.ai down?

It answered our last check on 17 October 2026 in 192 ms. Over 7 checks since 7 September 2026 it answered 7.

How do I add cnpj.ai to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.cnpj.ai/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does cnpj.ai need an API key?

It needs a sign-in rather than a key you paste: the server answered with an authentication challenge, so your client runs the login when it first connects.

Where this comes from

Publisher: ai.cnpj. Endpoint host: mcp.cnpj.ai. ARD identifier: urn:air:ai.cnpj:mcp:mcp. First indexed 7 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.