# Suxession — French Inheritance Tax Engine (remote · suxession.fr)

French inheritance tax engine: simulate, compare scenarios, savings estimate, premium optimizer.

- Trust score: 81/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-25

## Components

- remote · `suxession.fr`: 81/100 (this document), [markdown](https://verifymcp.io/servers/fr-suxession-suxession/suxession.md), [page](https://verifymcp.io/servers/fr-suxession-suxession/suxession)

## Channel facts

- Endpoint: `https://suxession.fr/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.6.1.0`

## 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 2026-10-25.

- **Endpoint Security**: 77/100
  - 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.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 62/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 812 tokens (~162/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 87/100
  - Stability observed for 26 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 86/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 50% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 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 current MCP spec version (2026-07-28).

## Install

### How do I install the Suxession — French Inheritance Tax Engine MCP server?

Suxession — French Inheritance Tax Engine is a hosted endpoint at https://suxession.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-suxession-suxession 'https://suxession.fr/mcp'
```

### Cursor

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

### VS Code

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

### Codex

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

### opencode

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

### OpenClaw

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

### Hermes

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

### Netclaw

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

### Vellum

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

### Other

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

### 2026-10-25 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 80, 0)

- [functional] Server version: 0.6.2.0 → 0.6.2.2

### 2026-10-22 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-18 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-14 (score 76, +1)

- [functional] Server version: 0.6.1.3 → 0.6.2.0

### 2026-10-13 (score 75, 0)

- [functional] Server version: 0.6.1.2 → 0.6.1.3

## MCP tools (5)

### `simuler_droits_succession` (~100 tokens)

Simulation des droits de succession

Calcule les droits de succession français (cas simple) : patrimoine, conjoint, enfants, régime matrimonial. Réponse : droits par héritier + articles CGI de référence + liens guide. Gratuit, sans compte.

Input parameters:

- `situation` (object, required): Sous-ensemble fiable du CalculRequest web (~30 sous-schemas → 8 champs). Cas simple uniquement : assurance-vie, donations, démembrement, SCI… → renvoi wizard.

Output parameters:

- `result` (string)

### `comparer_scenarios` (~74 tokens)

Comparaison de scénarios

Compare 1 à 5 scénarios de transmission (ex. usufruit total vs quart en pleine propriété), second décès inclus si conjoint. Gratuit. La projection « donation vs succession » (transmission de son vivant) est une analyse premium, hors de ce périmètre gratuit.

Input parameters:

- `scenarios` (array, required)

Output parameters:

- `result` (string)

### `estimer_economie_optimisation` (~137 tokens)

Teaser d'économie potentielle

Estime le montant EXACT de l'économie potentielle via les 25 leviers d'optimisation (gratuit, même calcul que le site). Les leviers individuels ne sont jamais nommés ni chiffrés dans la réponse ; prix (99 €, paiement unique) et lien de paiement inclus. Les leviers détaillés sont révélés par explorer_optimisations après achat.

Input parameters:

- `situation` (object, required): Sous-ensemble fiable du CalculRequest web (~30 sous-schemas → 8 champs). Cas simple uniquement : assurance-vie, donations, démembrement, SCI… → renvoi wizard.

Output parameters:

- `result` (string)

### `deverrouiller_acces` (~50 tokens)

Déverrouillage par code d'accès

Active l'accès premium à partir du code d'accès reçu après paiement (affiché sur la page de confirmation). Le code est transmis tel quel, sans modification.

Input parameters:

- `code` (string, required)

Output parameters:

- `result` (string)

### `explorer_optimisations` (~130 tokens)

Exploration des optimisations (premium)

Résultats de l'optimiseur complet (premium, accès 99 €) : nécessite un accès actif déverrouillé via deverrouiller_acces. Retourne les stratégies d'optimisation complètes : leviers, montants, articles CGI, avertissements. La mise en place se finalise avec un notaire.

Input parameters:

- `code` (string, required)
- `situation` (object, required): Sous-ensemble fiable du CalculRequest web (~30 sous-schemas → 8 champs). Cas simple uniquement : assurance-vie, donations, démembrement, SCI… → renvoi wizard.

Output parameters:

- `result` (string)

## Diagnostics

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

## Score history

- 2026-10-25: 81
- 2026-10-24: 80
- 2026-10-23: 80
- 2026-10-22: 80
- 2026-10-21: 79
- 2026-10-20: 79
- 2026-10-19: 78
- 2026-10-18: 78
- 2026-10-17: 77
- 2026-10-16: 77
- 2026-10-15: 76
- 2026-10-14: 76
- 2026-10-13: 75
- 2026-10-12: 75
- 2026-10-10: 74
- 2026-10-07: 73
- 2026-10-04: 71
- 2026-10-03: 71
- 2026-10-02: 70
- 2026-10-01: 70
- 2026-09-30: 62
- 2026-09-29: 61

## Common questions

### What is the Suxession — French Inheritance Tax Engine MCP server?

Suxession — French Inheritance Tax Engine is an MCP server listed in the public MCP registry as fr.suxession/suxession. French inheritance tax engine: simulate, compare scenarios, savings estimate, premium optimizer. This page covers its hosted endpoint (https://suxession.fr/mcp).

### Is the Suxession — French Inheritance Tax Engine MCP server safe to use?

Suxession — French Inheritance Tax Engine scores 81 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 Suxession — French Inheritance Tax Engine MCP server expose?

Suxession — French Inheritance Tax Engine exposes 5 tools: simuler_droits_succession, comparer_scenarios, estimer_economie_optimisation, deverrouiller_acces, explorer_optimisations. Their descriptions and schemas cost roughly 491 tokens of context every time the server is loaded.

### Does the Suxession — French Inheritance Tax Engine MCP server require authentication?

No. We connected to Suxession — French Inheritance Tax Engine without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Suxession — French Inheritance Tax Engine MCP server still maintained?

Suxession — French Inheritance Tax Engine is still listed as active in the MCP registry. We last reached this channel on 25 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://suxession.fr/mcp
- Website: https://suxession.fr/
- Changelog RSS feed: https://verifymcp.io/servers/fr-suxession-suxession/suxession.xml
- Changelog JSON feed: https://verifymcp.io/servers/fr-suxession-suxession/suxession.json
- HTML version of this page: https://verifymcp.io/servers/fr-suxession-suxession/suxession