# Sirenic Lookalike Prospection

> Sirenic Lookalike Prospection is a paid API for AI agents from api.sirenic.eu, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-22).

Given 2–5 reference French company SIRENs, returns up to 100 active French legal entities that match the inferred customer profile (NAF codes, workforce size, legal form, creation date, region), excluding the input companies.

## Facts

- Endpoint: GET https://api.sirenic.eu/v1/prospection/sosies?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sirenic-lookalike-prospection-a7ab62d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-QHCu4XqE6EDQQ607uglB

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-lookalike-prospection-a7ab62d9
```

Example prompt: Find me French companies that look like my best customers — their SIRENs are 552032534, 775726417, and 542107651 — focusing on the Île-de-France region (code 11).

## When to prefer this

Use this endpoint when you need to generate a B2B prospect list of French companies that resemble a known set of 2–5 good customers, and you want the profiling (NAF codes, workforce brackets, legal forms) done automatically rather than specifying criteria manually. Prefer it over generic company search endpoints when lookalike / ideal customer profile (ICP) matching is the goal and you have existing customer SIRENs to anchor from.

## Known failure modes

- Fewer than 2 or more than 5 SIRENs provided — request rejected
- Invalid SIREN format (non-9-digit or failing Luhn check) — validation error
- Both region and departement specified simultaneously — mutually exclusive parameters
- No matching companies found even after full profile widening — empty result set
- Invalid INSEE region or departement code — lookup fails

## How this service works

Find French companies that look like your best customers: give 2 to 5 customer SIRENs (?exemples=), optionally a region or departement, and get the first page of 100 active legal persons matching the profile deduced from them (NAF codes, workforce brackets, legal forms, creation dates, area), customers excluded, with the exact total. Under 50 results the profile widens one step at a time, each step stated; it is served as criteria to read the next pages.

## Output

Returns the first page of up to 100 active French legal entities whose NAF codes, workforce brackets, legal forms, creation dates, and geographic area match the profile inferred from the provided example SIRENs. The response includes the exact total count of matches, the profile criteria used, and pagination criteria for fetching subsequent pages. When fewer than 50 results are found, the profile is automatically widened step by step, with each relaxation step clearly stated.

## 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": [
      "exemples"
     ],
     "properties": {
      "region": {
       "type": "string",
       "description": "Optional INSEE region code (84), exclusive with departement: the area of the results, never widened."
      },
      "exemples": {
       "type": "string",
       "description": "2 to 5 distinct customer SIRENs (9 digits, valid Luhn key), comma-separated: the profile is deduced from them, and they are excluded from the results."
      },
      "departement": {
       "type": "string",
       "description": "Optional departement code (69, 2A, 971), exclusive with region: the area of the results, never widened."
      }
     }
    }
   },
   "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-lookalike-prospection-a7ab62d9/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)