How do I connect an AI agent to Brazil CNPJ company registry?

Use the MCP streamable HTTP endpoint https://cnpj-mcp.fly.dev/mcp.

Catalog › io.github.bnovarini/cnpj-mcp

Is Brazil CNPJ company registry reliable?

Being measured Measurement in progress: 2 check(s) so far. A verdict needs at least 3 checks.

En français : Mesure en cours. Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

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

Source: official MCP registry (registry.modelcontextprotocol.io) · version 0.1.0 · publisher website

Connect your agent

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

Or ask Faceabot first: MCP tool check_reliability {"id":"io.github.bnovarini/cnpj-mcp"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Not tested with a real task yet. Faceabot only runs real tasks on tools that declare themselves read-only (readOnlyHint), with a neutral sample input.

Faceabot measurements

When	Answers	Real task	Latency
2026-10-09 02:46 UTC	✅ ok	—	11703 ms
2026-10-08 18:01 UTC	✅ ok	—	8063 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

More from the same publisher

CFPB consumer complaints Flaky · 67% over 3 checks

CFPB consumer complaints: 18M records, 3.85M archived narratives. Search, counts, trends.

MCP endpoint : https://cfpb-complaints-analysis.fly.dev/mcp · website · measurements and details

NCUA credit union data Reliable (measured) · 100% over 4 checks

NCUA call report data for US credit unions, 2018-2026: profiles, peer comparison, time series.

MCP endpoint : https://ncua-data-analysis.fly.dev/mcp · website · measurements and details

Publisher of Brazil CNPJ company registry?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/io.github.bnovarini/cnpj-mcp.svg)](https://faceabot.com/tools/io.github.bnovarini/cnpj-mcp)

Data in JSON: /api/catalog?id=io.github.bnovarini/cnpj-mcp · Stop probes: POST /api/reliability/opt-out

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

Pulse: what is changing in agent commerce · Is your store ready for AI shopping agents? · State of MCP (weekly) · MCP server doctor · Open reliability data · Faceabot app · Faceabot → AI assistants · Add Faceabot to your AI · Badge for tool publishers · Help · Privacy · Terms