cnpj.ia.br
REMOTE · MCP.CNPJ.IA.BR · SCANNED OCT 4
Empresas do Brasil (CNPJ): consulta por CNPJ, busca por filtros e uso da conta.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security92
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- The endpoint enforces authorisation, advertised via RFC 9728 protected-resource metadata. View diagnostics → Pass
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server supports Client ID Metadata Documents, the current MCP client-registration mechanism. View diagnostics → Pass
Transport & Reachability0
- Transport blocked by authentication: the endpoint requires auth we don't have to verify streamable-http. See how to fix → View diagnostics → Unverified
Schema Quality & AI Usability0
- Schema blocked by authentication: the endpoint requires auth we don't have to read it. See how to fix → Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Tool Safety0
- Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Capabilities0
- Capabilities blocked by authentication: the endpoint requires auth we don't have to read them. See how to fix → Unverified
Unverified: 6 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm. Claim this server and supply a read-only token to verify it and lift the score.
How do I install the cnpj.ia.br MCP server?
cnpj.ia.br is a hosted endpoint at https://mcp.cnpj.ia.br/, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.cnpj.ia.br
claude mcp add --transport http br-ia-cnpj-mcp 'https://mcp.cnpj.ia.br/'
{
"mcpServers": {
"br-ia-cnpj-mcp": {
"url": "https://mcp.cnpj.ia.br/"
}
}
} {
"servers": {
"br-ia-cnpj-mcp": {
"type": "http",
"url": "https://mcp.cnpj.ia.br/"
}
}
} [mcp_servers.br-ia-cnpj-mcp] url = "https://mcp.cnpj.ia.br/"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"br-ia-cnpj-mcp": {
"type": "remote",
"url": "https://mcp.cnpj.ia.br/",
"enabled": true
}
}
} openclaw mcp add br-ia-cnpj-mcp --url 'https://mcp.cnpj.ia.br/' --transport streamable-http
mcp_servers:
br-ia-cnpj-mcp:
url: "https://mcp.cnpj.ia.br/" {
"McpServers": {
"br-ia-cnpj-mcp": {
"Transport": "http",
"Url": "https://mcp.cnpj.ia.br/"
}
}
} assistant mcp add br-ia-cnpj-mcp -t streamable-http -u 'https://mcp.cnpj.ia.br/'
{
"mcpServers": {
"br-ia-cnpj-mcp": {
"type": "http",
"url": "https://mcp.cnpj.ia.br/"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 22 Sept 26 −33
- Endpoint reachability: reachable → behind authorisation ▼ security
- Tool safety: pass → unverified ▼ security
- Transport: pass → unverified ▼ security
- Stability: 0.03 → unverified ▼ security
- Authorization: fail → pass ▲ security
- First check of Authorization: pass security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- 21 Sept 26 0
- Stability: unverified → 0.03 ▲ functional
- 20 Sept 26 70
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Oct 2026 · Probed https://mcp.cnpj.ia.br
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=api.cnpj.ia.br | CN=WR3,O=Google Trust Services,C=US | 18 Sept 2026 | 18 Dec 2026 | RSA 2048 | SHA256-RSA | ac63ef0c29198e8e120cd1d1ffb4e6e0 |
| SANs: api.cnpj.ia.br, app.cnpj.ia.br, mcp.cnpj.ia.br | ||||||
| CN=WR3,O=Google Trust Services,C=US (CA) | CN=GTS Root R1,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | RSA 2048 | SHA256-RSA | 7ff005a91568d63abc22861684aa4b5a |
| CN=GTS Root R1,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 19 Jun 2020 | 28 Jan 2028 | RSA 4096 | SHA256-RSA | 77bd0d6cdb36f91aea210fc4f058d30d |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.cnpj.ia.br. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| br. | present | 38298 | 13 | Verified |
| ia.br. | present | 2557 | 13 | Verified |
| cnpj.ia.br. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On connection |
| HTTP status | 401 |
WWW-Authenticate challenge Bearer resource_metadata="https://mcp.cnpj.ia.br/.well-known/oauth-protected-resource"
Bearer resource_metadata="https://mcp.cnpj.ia.br/.well-known/oauth-protected-resource"| Header | Value |
|---|---|
| www-authenticate | Bearer resource_metadata="https://mcp.cnpj.ia.br/.well-known/oauth-protected-resource" |
Protected resource metadata
| Document | https://mcp.cnpj.ia.br/.well-known/oauth-protected-resource |
|---|---|
| Retrieved | Yes |
| Resource | https://mcp.cnpj.ia.br/ |
| Authorisation server | https://mcp.cnpj.ia.br/ |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.cnpj.ia.br | Auth required | 401 | |
| http (plaintext) | http://mcp.cnpj.ia.br | HTTPS enforced | 301 | https://mcp.cnpj.ia.br:443/ |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
buscar_empresas Buscar Empresas ~136
Busca empresas por filtros. Página de até 20, paginação por meta.next_cursor (repassar em cursor). Custa 1 crédito por empresa retornada; página vazia custa 0. Ferramenta de plano pago: no plano Free responde insufficient_plan.
| Name | Type | Req | Description |
|---|---|---|---|
| abertura_ate | – | – | – |
| abertura_de | – | – | – |
| capital_max | – | – | – |
| capital_min | – | – | – |
| cnae | – | – | – |
| cursor | – | – | – |
| mei | – | – | – |
| municipio | – | – | – |
| natureza | – | – | – |
| porte | – | – | – |
| simples | – | – | – |
| situacao | – | – | – |
| uf | – | – | – |
No output schema declared.
No examples provided.
consultar_cnpj Consultar Cnpj ~82
Consulta um CNPJ na base. Custa 1 crédito no perfil basic (cadastro) e 6 créditos no perfil full (cadastro + telefones, e-mails, site, sócios sem CPF, regime tributário, faixa de funcionários e faturamento). Prefira basic.
| Name | Type | Req | Description |
|---|---|---|---|
| cnpj | string | yes | – |
| profile | string | – | – |
No output schema declared.
No examples provided.
gerar_filtro Gerar Filtro ~85
Converte uma descrição em português nos filtros de buscar_empresas. Fluxo em dois passos: (1) descreva o público; (2) passe os campos devolvidos um a um para buscar_empresas. O campo explicacao é texto para o usuário e NÃO volta como parâmetro da busca. Custa 1 crédito por chamada.
| Name | Type | Req | Description |
|---|---|---|---|
| descricao | string | yes | – |
No output schema declared.
No examples provided.
ver_uso Ver Uso ~29
Uso e franquia da conta (objeto Usage inteiro, sem envelope). Custo 0.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
What is the cnpj.ia.br MCP server?
cnpj.ia.br is an MCP server listed in the public MCP registry as br.ia.cnpj/mcp. Empresas do Brasil (CNPJ): consulta por CNPJ, busca por filtros e uso da conta. This page covers its hosted endpoint (https://mcp.cnpj.ia.br).
Is the cnpj.ia.br MCP server safe to use?
cnpj.ia.br scores 37 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the cnpj.ia.br MCP server expose?
cnpj.ia.br exposes 4 tools: consultar_cnpj, buscar_empresas, gerar_filtro, ver_uso. Their descriptions and schemas cost roughly 332 tokens of context every time the server is loaded.
Does the cnpj.ia.br MCP server require authentication?
Yes. cnpj.ia.br asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the cnpj.ia.br MCP server still maintained?
cnpj.ia.br is still listed as active in the MCP registry. We last reached this channel on 4 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.