# Sirenic Reverse Director Search by Surname

> Sirenic Reverse Director Search by Surname is a paid API for AI agents from api.sirenic.eu, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Searches the French company registry to find all companies where a person with a given surname holds or held a directorship or officer role, returning SIREN numbers, company names, and roles.

## Facts

- Endpoint: GET https://api.sirenic.eu/v1/dirigeant/recherche
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sirenic-reverse-director-search-by-surname-92c730bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EghBrGkVzb_fcv_JD_Dr9

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sirenic-reverse-director-search-by-surname-92c730bf
```

Example prompt: Can you find all French companies where someone with the surname 'Lefebvre' is or was a director? I need their SIREN numbers, company names, and what roles they hold — I'm doing due diligence on a business contact.

## When to prefer this

Use this endpoint when you need to perform a reverse director lookup — starting from a person's surname and finding their associated French companies — rather than starting from a company SIREN. Ideal for due diligence, KYB workflows, compliance screening, or corporate network mapping where you know a person's name but not which companies they are linked to. Prefer this over the full company intelligence endpoint when you don't yet know the target SIREN.

## Known failure modes

- Very common surname returns capped/truncated results without warning
- Homonyms not disambiguated — multiple different people with same surname mixed in results
- Surname not found in registry returns empty list
- Missing or misspelled 'nom' query parameter causes 400 error
- Rate limiting or payment failure causes 402/429 error
- Surname with accents or special characters may require proper URL encoding

## How this service works

Reverse search for company directors and officers in France: a people search by surname (?nom=) that lists the French companies where a person of that name holds or held an office, with each company SIREN, name and the person role — network mapping and due diligence on directors. Person data is limited to surname, first names, role and birth YEAR (French GDPR/INPI rules). Results are indicative: homonyms are not disambiguated and very common names are capped.

## Output

A list of French companies associated with the searched surname, each entry including the company SIREN number, company name, the person's first names, their role/office held, and their birth year. Results are indicative and may include homonyms; very common surnames may be capped. Person data is limited per French GDPR/INPI rules.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "nom"
     ],
     "properties": {
      "nom": {
       "type": "string",
       "description": "Director surname to search. Unsupported characters are stripped, not rejected."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sirenic-reverse-director-search-by-surname-92c730bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sirenic.eu](https://www.zero.xyz/host/api.sirenic.eu/llms.txt)