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Qotien — French Tax Niche Cap Calculator (niches_plafond)
x402
Qotien — French Tax Niche Cap Calculator (niches_plafond) is a paid API for AI agents from app.qotien.fr, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).
Computes the French global tax-niche ceiling (plafonnement global des niches fiscales, CGI art. 200-0 A) given a list of tax advantages and their amounts.
Price / call$0.25
Success—
StatusUnknown
How this service works
Simulateur IFI, PER, IR et retraite (32 régimes). Logiciel CGP : bilan patrimonial, déclaration 2042, LMNP. Chiffres sourcés Légifrance et BOFiP. 14 jours d'essai.
Output
Returns a JSON object with ok (boolean), result containing a EUR value for the global niche cap, a human-readable label, a confidence level (fiable/estime/partiel/non_calculable/sourcee/variable), legal sources (e.g. CGI art. 200-0 A), the fiscal year applied (millesime_fiscal), and an advisory disclaimer.
Example use cases
CGP client annual tax declaration review
“My client has 4 000 € in SOFICA, 2 500 € in emploi à domicile, and 1 500 € in FCPI investments — calculate their global niche cap under the plafonnement global des niches fiscales so I can finalize their déclaration 2042.”
Pre-investment tax advantage compliance check
“Before my client subscribes to an additional FCPI of 6 000 €, can you compute the current niche ceiling given they already have 3 000 € in Dons organismes d'intérêt général and 2 000 € in emploi à domicile? I need to know if they'll be capped.”
Portfolio optimization for niche ceiling
“I'm advising a client with 8 000 € in SOFICA, 3 000 € in emploi à domicile, and 4 000 € in FCPI — run the plafonnement global calculation and tell me the EUR cap value and whether the result is fiable so I can adjust their portfolio.”
Technical details
Endpoint
POSThttps://app.qotien.fr/api/fiscal/v1/calc/niches_plafondWhen to prefer
Use this endpoint when you need a legally-sourced, automated calculation of the French global tax-niche ceiling (plafonnement global des niches fiscales under CGI art. 200-0 A) for a specific combination of tax advantages. Prefer it over generic tax calculators because it references official Légifrance and BOFiP sources and returns a structured confidence rating. Best suited for CGP (wealth management advisor) workflows, tax declaration prep, and pre-investment compliance checks within the French fiscal system.
Side effects
- Invalid niche type string — unrecognized libellé may produce non_calculable confidence
- Negative montant — rejected by schema (minimum: 0)
- Empty niches array — may return 0 cap value or error
- Missing required fields (type or montant) — API returns ok:false with error field
- Unsupported fiscal year edge cases — may return estime confidence instead of fiable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| niches | array | Liste des avantages : [{type, montant}]. `type` = libellé de niche (ex. "Emploi à domicile", "FCPI", "SOFICA", "Dons organismes intérêt général"). |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"ok",
"domaine",
"capability",
"result",
"confiance",
"sources",
"millesime_fiscal"
],
"properties": {
"ok": {
"type": "boolean",
"description": "true = succès ; false = erreur (champ \"error\" présent à la place de result)."
},
"result": {
"type": "object",
"properties": {
"unit": {
"type": "string",
"description": "Unité de value (EUR, PERCENT, RATE…)."
},
"label": {
"type": "string",
"description": "Libellé lisible du résultat."
},
"value": {
"type": "number",
"description": "Valeur principale (quand le résultat est scalaire)."
},
"confiance": {
"enum": [
"fiable",
"estime",
"partiel",
"non_calculable",
"sourcee",
"variable"
],
"type": "string",
"description": "Confiance propre au résultat retraite (prime sur la confiance de capacité)."
}
},
"description": "Résultat. Contient typiquement { value:number, unit:string, label:string } ; les outils retraite ajoutent confiance, fourchette, et le détail par régime."
},
"domaine": {
"enum": [
"fiscal",
"retraite",
"referentiel",
"qotien"
],
"type": "string",
"description": "Domaine de la capacité."
},
"sources": {
"type": "array",
"items": {
"type": "string"
},
"description": "Sources primaires/légales du calcul."
},
"confiance": {
"enum": [
"fiable",
"estime",
"partiel",
"non_calculable",
"sourcee",
"variable"
],
"type": "string",
"description": "Niveau de confiance de CE résultat (fiscal = fiable ; retraite = variable)."
},
"capability": {
"type": "string",
"description": "Nom de la capacité appelée."
},
"referentiel": {
"type": "string",
"description": "Version du référentiel sourcé utilisé."
},
"annee_revenus": {
"type": "number",
"description": "Année des revenus concernés."
},
"avertissement": {
"type": "string",
"description": "Avertissement d'usage (résultat brut, pas un conseil personnalisé)."
},
"millesime_fiscal": {
"type": "string",
"description": "Millésime fiscal (année des barèmes appliqués)."
}
}
},
"example": {
"ok": true,
"result": {
"unit": "EUR",
"label": "Plafonnement global des niches fiscales",
"value": 0
},
"domaine": "fiscal",
"sources": [
"CGI art. 200-0 A (plafonnement global)",
"CGI art. 200 (dons)"
],
"confiance": "fiable",
"capability": "niches_plafond",
"referentiel": "references_officielles.json v0.8.6",
"annee_revenus": 2025,
"millesime_fiscal": "2026"
}
}Tags
x402
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