# Aucadastre (remote · aucadastre.fr)

A French address, all public facts: parcel, zoning, risks, permits, sales, energy labels. No key.

- Trust score: 76/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-25

## Components

- remote · `aucadastre.fr`: 76/100 (this document), [markdown](https://verifymcp.io/servers/fr-aucadastre-aucadastre/aucadastre.md), [page](https://verifymcp.io/servers/fr-aucadastre-aucadastre/aucadastre)

## Channel facts

- Endpoint: `https://aucadastre.fr/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 2026-09-25.

- **Endpoint Security**: 69/100
  - 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 enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - 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**: 63/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1021 tokens (~255/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 67/100
  - Stability observed for 20 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 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

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

Aucadastre is a hosted endpoint at https://aucadastre.fr/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 fr-aucadastre-aucadastre 'https://aucadastre.fr/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "fr-aucadastre-aucadastre": {
      "url": "https://aucadastre.fr/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "fr-aucadastre-aucadastre": {
      "type": "http",
      "url": "https://aucadastre.fr/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.fr-aucadastre-aucadastre]
url = "https://aucadastre.fr/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add fr-aucadastre-aucadastre --url 'https://aucadastre.fr/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  fr-aucadastre-aucadastre:
    url: "https://aucadastre.fr/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "fr-aucadastre-aucadastre": {
      "Transport": "http",
      "Url": "https://aucadastre.fr/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add fr-aucadastre-aucadastre -t streamable-http -u 'https://aucadastre.fr/mcp'
```

### Other

```json
{
  "mcpServers": {
    "fr-aucadastre-aucadastre": {
      "type": "http",
      "url": "https://aucadastre.fr/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.

### 2026-09-25 (score 76, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 76, 0)

- [security] The server rewrote its instructions, which are the text every model session reads

### 2026-09-23 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 72, +1)

- [cosmetic] Tool “get_french_address_facts” changed its title: Tout ce qu'on sait d'une adresse en France → La parcelle et l'urbanisme d'une adresse en France

### 2026-09-12 (score 71, +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.

## MCP tools (4)

### `get_french_address_facts` (~243 tokens)

La parcelle et l'urbanisme d'une adresse en France

Les proprietaires personnes morales de l'adresse (SCI, societes, bailleurs sociaux, collectivites, Etat, avec SIREN et date de situation, jamais un particulier), la parcelle cadastrale d'une adresse francaise et sa contenance, le zonage d'urbanisme et les destinations autorisees, les prescriptions et servitudes, les risques (argile, sismicite, radon, catastrophes naturelles, installations classees), le terrain (altitude, pente, solaire), les permis de construire rattaches a la voie, les ventes des cinq derniers millesimes, au numero demande l'historique de sa parcelle (ventes, autorisations, naissance au plan depuis 2017), les diagnostics energetiques, les ecoles et entreprises autour. Meme texte que le jumeau .md de la page de voie. L'adresse se donne en toutes lettres ; sans numero, la reponse vaut au point de reference de la voie.

Input parameters:

- `address` (string, required): L'adresse en toutes lettres, par exemple « 60 rue Pasteur, Vitry-sur-Seine ». Le numero est facultatif.

### `get_french_commune_facts` (~193 tokens)

Le marche, l'urbanisme et les risques d'une commune francaise

Une commune francaise : ses voies adressees, le prix median au metre carre du dernier millesime, le loyer d'annonce au metre carre, le taux de taxe fonciere et son evolution depuis 2020, le document d'urbanisme opposable, la zone A/B/C du marche du logement, la part des locaux raccordables a la fibre, les risques communaux, la delinquance enregistree face au departement et a la France (SSMSI), l'eau du robinet (dernier controle sanitaire, analyses de douze mois, PFAS). Meme texte que le jumeau .md de la page de commune. Paris, Marseille et Lyon renvoient a leurs arrondissements.

Input parameters:

- `code_insee` (string, required): Code INSEE de la commune, cinq caracteres, par exemple 94081 (Vitry-sur-Seine).

### `get_french_building_permits` (~131 tokens)

Les autorisations d'urbanisme delivrees dans une commune francaise

Les permis de construire, d'amenager, de demolir et les declarations prealables delivres dans une commune, tels que la commune les declare au ministere (fichier Sitadel) : date, nature, adresse des travaux, parcelle, logements et surface crees, etat du chantier, demandeur quand c'est une personne morale. Les 500 plus recents ; l'API pagine le reste.

Input parameters:

- `code_insee` (string, required): Code INSEE de la commune, cinq caracteres, par exemple 94081 (Vitry-sur-Seine).

### `get_french_parcel` (~136 tokens)

Une parcelle cadastrale francaise par sa reference

Une parcelle par son identifiant a quatorze caracteres (code INSEE, prefixe, section, numero, par exemple 94081000AB0123) : sa contenance, sa commune, et la voie la plus proche de son centre, dont le jumeau porte tout le reste. Le proprietaire n'y est pas : ceux qui sont des personnes morales se lisent dans le jumeau de la voie, un particulier nulle part.

Input parameters:

- `parcel_id` (string, required): L'identifiant de la parcelle, quatorze caracteres, par exemple 94081000AB0123.

## Diagnostics

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

## Score history

- 2026-09-25: 76
- 2026-09-24: 76
- 2026-09-23: 76
- 2026-09-22: 75
- 2026-09-21: 75
- 2026-09-20: 74
- 2026-09-19: 74
- 2026-09-18: 73
- 2026-09-17: 73
- 2026-09-16: 72
- 2026-09-15: 72
- 2026-09-14: 72
- 2026-09-13: 71
- 2026-09-12: 71
- 2026-09-11: 70
- 2026-09-10: 70
- 2026-09-09: 69
- 2026-09-08: 69
- 2026-09-07: 66
- 2026-09-06: 66
- 2026-09-05: 65

## Common questions

### What is the Aucadastre MCP server?

Aucadastre is an MCP server listed in the public MCP registry as fr.aucadastre/aucadastre. A French address, all public facts: parcel, zoning, risks, permits, sales, energy labels. No key. This page covers its hosted endpoint (https://aucadastre.fr/mcp).

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

Aucadastre scores 76 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 Aucadastre MCP server expose?

Aucadastre exposes 4 tools: get_french_address_facts, get_french_commune_facts, get_french_building_permits, get_french_parcel. Their descriptions and schemas cost roughly 703 tokens of context every time the server is loaded.

### Does the Aucadastre MCP server require authentication?

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

### Is the Aucadastre MCP server still maintained?

Aucadastre is still listed as active in the MCP registry. We last reached this channel on 25 September 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://aucadastre.fr/mcp
- Website: https://aucadastre.fr/api
- Changelog RSS feed: https://verifymcp.io/servers/fr-aucadastre-aucadastre/aucadastre.xml
- Changelog JSON feed: https://verifymcp.io/servers/fr-aucadastre-aucadastre/aucadastre.json
- HTML version of this page: https://verifymcp.io/servers/fr-aucadastre-aucadastre/aucadastre