Kalvi — NFS-e e IBS/CBS

MCP server · hosted · v0.1.0 · io.github.marcogorrasi-hub/kalvi-nfse

Online · tested 1h agoNEW · 2h agoSeen in the registry 1h ago

Confere a NFS-e brasileira para IBS/CBS antes de transmitir. Sem cadastro e sem chave.

What it does

Kalvi — NFS-e e IBS/CBS is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence) and are not a test of the tool.

At a glance

Hosted (remote)YES

Local installNO

Live checkOnline · 3 tools

Version0.1.0

PriceNot in the registry

First seen23 Oct 2026

Last checked1h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 1h ago (live check)

Hosted endpoint

https://api.kalvi.com.br/v1/mcp streamable-http

In Claude Code: claude mcp add --transport http kalvi-nfs-e-e-ibs-cbs https://api.kalvi.com.br/v1/mcp

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "kalvi-nfs-e-e-ibs-cbs": {
      "url": "https://api.kalvi.com.br/v1/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 1h ago

ONLINE Kalvi — NFS-e e IBS/CBS answered an MCP connection on 24 Oct 2026 and introduced itself as kalvi-nfse 0.1.0 (MCP protocol 2025-06-18).

3 tools offered to AI assistants

validar_nfse · Confere o XML da DPS (NFS-e do padrão nacional) contra as regras oficiais de IBS/CBS e devolve o que seria recusado, com o código oficial de rejeição e o campo do XML que causou. Use antes de transmitir. Nada da nota é guardado.
classificar_servico · A partir do item da LC 116 (ou do código de tributação nacional), do regime do prestador, do município e da data de competência, devolve os candidatos de CST e cClassTrib com justificativa, alíquotas vigentes e a fonte oficial de cada regra
explicar_rejeicao · Recebe um código de rejeição da NFS-e nacional (E0958, E0855, E0959...) e devolve o texto oficial da regra, o campo do XML a que ela se refere e se o efeito é recusar a nota. Use quando a pergunta for 'o que significa este erro'.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Hosted endpoint	https://api.kalvi.com.br/v1/mcp	DECLARED	SRC-001 Official MCP Registry	1h ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	1h ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	1h ago
Website	https://kalvi.com.br	DECLARED	SRC-001 Official MCP Registry	1h ago
Repository	https://github.com/marcogorrasi-hub/Classifica-NFSe	DECLARED	SRC-001 Official MCP Registry	1h ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	1h ago
Version	0.1.0	DECLARED	SRC-001 Official MCP Registry	1h ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	1h ago

Change history

NEW23 Oct 2026
first seen in the index

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Is Kalvi — NFS-e e IBS/CBS still online?

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Questions about Kalvi — NFS-e e IBS/CBS

How do I connect Kalvi — NFS-e e IBS/CBS?

Use the hosted endpoint https://api.kalvi.com.br/v1/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does Kalvi — NFS-e e IBS/CBS offer?

When Electra Index connected on 24 Oct 2026, it listed 3 tools: validar_nfse, classificar_servico, explicar_rejeicao. The full list is in "Live check" above.

Is Kalvi — NFS-e e IBS/CBS online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 1h ago.