# Kalvi — NFS-e e IBS/CBS (remote · api.kalvi.com.br)

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

- Trust score: 71/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `api.kalvi.com.br`: 71/100 (this document), [markdown](https://verifymcp.io/servers/marcogorrasi-hub-kalvi-nfse/v1-mcp.md), [page](https://verifymcp.io/servers/marcogorrasi-hub-kalvi-nfse/v1-mcp)

## Channel facts

- Endpoint: `https://api.kalvi.com.br/v1/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 11/100
  - TLS not yet verified: we couldn't open a connection to check the certificate.
  - Authorisation not yet verified: we couldn't confirm whether this endpoint requires it.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS not yet verified: we couldn't read the response headers to check for it.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 0/100
  - Transport check failed: declared streamable-http, but we couldn't connect to verify it.
- **Schema Quality & AI Usability**: 0/100
  - Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Tool Safety**: 0/100
  - Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Capabilities**: 0/100
  - Capabilities not yet verified: we couldn't read the endpoint's capabilities.

**Unverified: 5 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.

## Install

### How do I install the Kalvi — NFS-e e IBS/CBS MCP server?

Kalvi — NFS-e e IBS/CBS is a hosted endpoint at https://api.kalvi.com.br/v1/mcp, 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.

### Claude

```bash
claude mcp add --transport http marcogorrasi-hub-kalvi-nfse 'https://api.kalvi.com.br/v1/mcp'
```

### Cursor

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

### VS Code

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

### Codex

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

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "marcogorrasi-hub-kalvi-nfse": {
      "type": "remote",
      "url": "https://api.kalvi.com.br/v1/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add marcogorrasi-hub-kalvi-nfse --url 'https://api.kalvi.com.br/v1/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  marcogorrasi-hub-kalvi-nfse:
    url: "https://api.kalvi.com.br/v1/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "marcogorrasi-hub-kalvi-nfse": {
      "Transport": "http",
      "Url": "https://api.kalvi.com.br/v1/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add marcogorrasi-hub-kalvi-nfse -t streamable-http -u 'https://api.kalvi.com.br/v1/mcp'
```

### Other

```json
{
  "mcpServers": {
    "marcogorrasi-hub-kalvi-nfse": {
      "type": "http",
      "url": "https://api.kalvi.com.br/v1/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 71, 0)

- [security regression] Endpoint reachability: reachable → unreachable
- [security regression] Stability: 0.33 → unverified
- [security regression] Tool safety: pass → unverified
- [security regression] TLS certificate: pass → unverified
- [security regression] HSTS header: pass → unverified
- [security regression] Transport: pass → fail
- [security] Authorization: Authorisation not yet verified: we couldn't confirm whether this endpoint requires it.
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified

### 2026-11-03 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 66, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-24 (score 66)

First indexed and scored.

## MCP tools (3)

### `validar_nfse` (~84 tokens)

Conferir uma NFS-e antes de transmitir

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.

Input parameters:

- `xml` (string, required): O XML da DPS, completo, como string.

### `classificar_servico` (~175 tokens)

Descobrir o CST e o cClassTrib de um serviço

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'.

Input parameters:

- `competence_date` (string, required): AAAA-MM-DD.
- `municipality_code` (string, required): Código IBGE de 7 dígitos.
- `nbs_code` (string): NBS, quando houver.
- `operation_nature` (string)
- `service_code` (string, required): Item da LC 116 ("04.01") ou cTribNac de 6 dígitos ("040101").
- `tax_regime` (string, required)

### `explicar_rejeicao` (~97 tokens)

Explicar um código de rejeição da NFS-e

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'.

Input parameters:

- `codigo` (string, required): O código, como veio na recusa. Ex.: "E0958".

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/marcogorrasi-hub-kalvi-nfse/v1-mcp#diagnostics

## Score history

- 2026-11-05: 71
- 2026-11-04: 71
- 2026-11-03: 71
- 2026-11-02: 70
- 2026-11-01: 70
- 2026-10-31: 69
- 2026-10-30: 69
- 2026-10-29: 68
- 2026-10-28: 68
- 2026-10-27: 67
- 2026-10-26: 67
- 2026-10-25: 66
- 2026-10-24: 66

## Common questions

### What is the Kalvi — NFS-e e IBS/CBS MCP server?

Kalvi — NFS-e e IBS/CBS is an MCP server listed in the public MCP registry as io.github.marcogorrasi-hub/kalvi-nfse. Confere a NFS-e brasileira para IBS/CBS antes de transmitir. Sem cadastro e sem chave. This page covers its hosted endpoint (https://api.kalvi.com.br/v1/mcp).

### Is the Kalvi — NFS-e e IBS/CBS MCP server safe to use?

Kalvi — NFS-e e IBS/CBS scores 71 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 Kalvi — NFS-e e IBS/CBS MCP server expose?

Kalvi — NFS-e e IBS/CBS exposes 3 tools: validar_nfse, classificar_servico, explicar_rejeicao. Their descriptions and schemas cost roughly 356 tokens of context every time the server is loaded.

### Does the Kalvi — NFS-e e IBS/CBS MCP server require authentication?

Its publisher declares no required credentials for Kalvi — NFS-e e IBS/CBS. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.

### Is the Kalvi — NFS-e e IBS/CBS MCP server still maintained?

Kalvi — NFS-e e IBS/CBS is still listed in the MCP registry, though our most recent checks did not reach this channel. We last reached this channel on 3 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.kalvi.com.br/v1/mcp
- Repository: https://github.com/marcogorrasi-hub/Classifica-NFSe
- Website: https://kalvi.com.br/
- Changelog RSS feed: https://verifymcp.io/servers/marcogorrasi-hub-kalvi-nfse/v1-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/marcogorrasi-hub-kalvi-nfse/v1-mcp.json
- HTML version of this page: https://verifymcp.io/servers/marcogorrasi-hub-kalvi-nfse/v1-mcp