Kalvi — NFS-e e IBS/CBS MCP Server

by marcogorrasi-hub Your server? Claim it

answering

Kalvi — NFS-e e IBS/CBS is answering right now. Last checked moments ago. It exposes 3 tools.

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

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 50 hours of history

50 hours agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

374 ms

Response time

average over 24h

open, no key

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add kalvi-nfse --transport http https://api.kalvi.com.br/v1/mcp

Settings → Connectors → Add custom connector, then paste this address

https://api.kalvi.com.br/v1/mcp

~/.codex/config.toml

[mcp_servers.kalvi-nfse]
url = "https://api.kalvi.com.br/v1/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "kalvi-nfse": {
      "url": "https://api.kalvi.com.br/v1/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "kalvi-nfse": {
      "type": "http",
      "url": "https://api.kalvi.com.br/v1/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

classificar

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. Use quando a pergunta for 'qual código eu uso neste serviço'.

explicar

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'.

validar

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.

Endpoints

URL	Transport	State	Latency	Checked
https://api.kalvi.com.br/v1/mcp	streamable-http	answering	335 ms	0 min ago

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Kalvi — NFS-e e IBS/CBS — questions

Answers built from our own checks of this server.

What can Kalvi — NFS-e e IBS/CBS do?

It exposes 3 tools, read directly from the server on our last check. Among them: classificar_servico, explicar_rejeicao, validar_nfse. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Kalvi — NFS-e e IBS/CBS working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 374 ms. The bar chart above shows every period we have measured.

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

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

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

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Kalvi — NFS-e e IBS/CBS need an API key?

No. Kalvi — NFS-e e IBS/CBS completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Kalvi — NFS-e e IBS/CBS?

It answers our handshake in 374 ms on average, which is faster than 39% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.