# MaFactureOK (remote · mafactureok.com)

Vérifie une facture électronique (Factur-X, UBL, CII), un SIREN/SIRET, une TVA ; explique un rejet.

- Trust score: 80/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-22

## Components

- remote · `mafactureok.com`: 80/100 (this document), [markdown](https://verifymcp.io/servers/com-mafactureok-mafactureok/api-mcp.md), [page](https://verifymcp.io/servers/com-mafactureok-mafactureok/api-mcp)

## Channel facts

- Endpoint: `https://mafactureok.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.0`

## 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 2026-10-22.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 80/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 813 tokens (~162/item across 5 items; 4 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 40/100
  - Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### How do I install the MaFactureOK MCP server?

MaFactureOK is a hosted endpoint at https://mafactureok.com/api/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 com-mafactureok-mafactureok 'https://mafactureok.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-mafactureok-mafactureok": {
      "url": "https://mafactureok.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-mafactureok-mafactureok": {
      "type": "http",
      "url": "https://mafactureok.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-mafactureok-mafactureok]
url = "https://mafactureok.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-mafactureok-mafactureok": {
      "type": "remote",
      "url": "https://mafactureok.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-mafactureok-mafactureok --url 'https://mafactureok.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-mafactureok-mafactureok:
    url: "https://mafactureok.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-mafactureok-mafactureok": {
      "Transport": "http",
      "Url": "https://mafactureok.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-mafactureok-mafactureok -t streamable-http -u 'https://mafactureok.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-mafactureok-mafactureok": {
      "type": "http",
      "url": "https://mafactureok.com/api/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.

### 2026-10-21 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-17 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-15 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-13 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-12 (score 75, +1)

- [functional improvement] Stability: unverified → 0.07

### 2026-10-10 (score 74)

First indexed and scored.

## MCP tools (4)

### `verifier_tiers` (~143 tokens)

Vérifier une entreprise (SIREN ou SIRET)

Vérifie un ou plusieurs SIREN (9 chiffres) ou SIRET (14 chiffres) au registre officiel des entreprises et auprès de VIES : existe-t-elle, est-elle active ou cessée, sous quel nom et à quelle adresse, son numéro de TVA est-il valide. À utiliser avant de payer une facture ou de créer un client. Sans clé : 5 identifiants par appel, 30 par jour. Avec une clé gratuite (https://mafactureok.com/api) : 25 par appel, 200 par jour.

Input parameters:

- `identifiants` (array, required): SIREN ou SIRET, espaces et points tolérés

### `verifier_tva` (~112 tokens)

Vérifier un numéro de TVA intracommunautaire français

Vérifie un numéro de TVA intracommunautaire français (FR + 2 caractères + 9 chiffres) : clé de contrôle, validité auprès du service européen VIES, et entreprise associée au registre officiel (nom, adresse, active ou cessée). Numéros français uniquement ; pour un autre pays, utiliser VIES directement. Sans clé : quota réduit ; clé gratuite facultative.

Input parameters:

- `numero` (string, required): Numéro de TVA, par exemple FR42456500537 ; espaces tolérés

### `valider_facture` (~141 tokens)

Vérifier une facture électronique (dépôt de fichier)

Ouvre une carte de dépôt dans la conversation. L'utilisateur y glisse sa facture électronique (PDF Factur-X, XML UBL ou CII, 15 Mo au maximum) ; le fichier est envoyé directement à MaFactureOK, analysé puis effacé, et la carte affiche le verdict (valide, à vérifier, invalide), chaque anomalie en français avec la correction attendue, et l'état des entreprises de la facture au registre officiel. À appeler dès que l'utilisateur veut vérifier, valider ou comprendre le rejet d'une facture qu'il possède en fichier. Aucun argument : le fichier n'est jamais transmis par le modèle.

### `expliquer_code_rejet` (~134 tokens)

Expliquer un code de rejet ou une règle de validation

Traduit en clair un motif de rejet ou de refus de facture électronique (codes AFNOR XP Z12-012 : REJ_SEMAN, REJ_ADR, DEST_INC, NON_TRANSMISE, TX_TVA_ERR…) ou une règle de validation EN 16931 / française (BR-CO-15, BR-FR-10, BR-S-08…) : signification, action attendue, faut-il un avoir. Sans clé, données du site MaFactureOK.

Input parameters:

- `code` (string, required): Code tel que reçu, par exemple REJ_SEMAN ou BR-CO-15

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-mafactureok-mafactureok/api-mcp#diagnostics

## Score history

- 2026-10-22: 80
- 2026-10-21: 80
- 2026-10-20: 79
- 2026-10-19: 79
- 2026-10-18: 78
- 2026-10-17: 78
- 2026-10-16: 77
- 2026-10-15: 77
- 2026-10-14: 76
- 2026-10-13: 76
- 2026-10-12: 75
- 2026-10-10: 74

## Common questions

### What is the MaFactureOK MCP server?

MaFactureOK is an MCP server listed in the public MCP registry as com.mafactureok/mafactureok. Vérifie une facture électronique (Factur-X, UBL, CII), un SIREN/SIRET, une TVA ; explique un rejet. This page covers its hosted endpoint (https://mafactureok.com/api/mcp).

### Is the MaFactureOK MCP server safe to use?

MaFactureOK scores 80 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 MaFactureOK MCP server expose?

MaFactureOK exposes 4 tools: verifier_tiers, verifier_tva, valider_facture, expliquer_code_rejet. Their descriptions and schemas cost roughly 530 tokens of context every time the server is loaded.

### Does the MaFactureOK MCP server require authentication?

No. We connected to MaFactureOK without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the MaFactureOK MCP server still maintained?

MaFactureOK is still listed as active in the MCP registry. We last reached this channel on 22 October 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://mafactureok.com/api/mcp
- Website: https://mafactureok.com/serveur-mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-mafactureok-mafactureok/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-mafactureok-mafactureok/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-mafactureok-mafactureok/api-mcp