# Rivals on your public-procurement segments

The comparison scope is not chosen by you but derived from the facts: the route takes the company's top 5 CPV segments over 5 years, then looks for who wins on them. That is what stops you comparing a company with rivals it never meets.

## What the route returns

Catalogue description, exactly as agents read it:

**Who wins French public contracts on the SAME CPV segments as a given company (SIREN): top rival contractors over the last 3 years, with contract counts, total amounts and shared segments — competitive intelligence for public-procurement bidding, from DECP open data. The company's own top-5 CPV segments (last 5 years) define the comparison scope.**

## Expected identifier

9-digit company number.

> ⚠️ A wrongly formatted identifier returns `400` and is **not billed** — but it costs you a round trip. It is the leading cause of failed calls on the foreign routes.

## Extract from a genuinely paid response

Dated snapshot from 2026-08-18, truncated to one item per array. It is not live data. The full extract is served **free of charge** from [the samples surface](https://api.sirenic.eu/exemples/), and the schema from the OpenAPI document.

```
{
 "siren": "130031487",
 "segments_cpv": [
  {
   "cpv4": "7999",
   "nombre": 7
  },
  {
   "cpv4": "8053",
   "nombre": 3
  }
 ],
 "periode_comparaison_annees": 3,
 "concurrents": [
  {
   "siren": "444523526",
   "nom": "ARTELIA",
   "nombre_marches": 256,
   "montant_total": 114202197.09,
   "segments_communs": [
    "7124",
    "7931"
   ]
  }
 ]
}
```

## Price and billing

Price: **$0.02**. The authoritative amount is the one in the `402` quote returned by the route itself — not this text, which derives from the same grid but is still just a page.

An error response **cancels the payment**: a `400`, `404` or `503` is never billed. An upstream outage closes the route with a `503` rather than serving a degraded response.

## Calling the route

```
# 1. Le devis, sans rien payer : la route répond 402 avec son montant
curl -i https://api.sirenic.eu/v1/entreprise/552032534/concurrents-marches

# 2. L'appel réglé — le client x402 paie le devis et rejoue la requête
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534/concurrents-marches

# 3. Ou en MCP, dans Claude Code / Cursor / un agent
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp
```

## Neighbouring routes

- `/v1/entreprise/{siren}/marches-publics` — $0.01
- `/v1/acheteur/{siret}/profil` — $0.02

## How you pay

Every route is paid **per call**, in USDC or EURC on the Base network, over the x402 protocol: no account to create, no API key, no subscription. The first call returns a `402` quote your client settles, then replays the call. A failed call is never billed.

Would you rather have a euro invoice and prepaid credits? That is **in preparation**, and we will not announce a date until it is open. Write to [contact@sirenic.eu](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs) and we will let you know when it opens.

Paid responses are **Ed25519-signed**: you can later prove what was served to you, and when. The whole catalogue is free to read in the [OpenAPI document](https://api.sirenic.eu/openapi.json) and in [llms.txt](https://api.sirenic.eu/llms.txt).

**One call, end to end**

```
# Client x402 (npm) — le devis 402 est réglé et l'appel rejoué automatiquement
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Ou en MCP, dans Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp
```

## Routes used and pricing

| Route | Price | What it returns |
| --- | --- | --- |
| `/v1/entreprise/{siren}/concurrents-marches` | $0.02 | Who wins French public contracts on the SAME CPV segments as a given company (SIREN): top rival contractors over the last 3 years, with contract counts, total amounts and shared segments — competitive intelligence for public-procurement bidding, from DECP open data. The company's own top-5 CPV segments (last 5 years) define the comparison scope. |

> ⚠️ Contract end dates are estimates, computed from the notification date and the declared duration. This is not an official re-tendering calendar.

## Take it further

- [See a real response (free)](https://api.sirenic.eu/exemples/entreprise-siren-concurrents-marches.json)
- [Get the quote for /v1/entreprise/{siren}/concurrents-marches](https://api.sirenic.eu/v1/entreprise/552032534/concurrents-marches)
- [Get notified about euro packs](mailto:contact@sirenic.eu?subject=Euro%20credit%20packs)

## Read next

- [Anticipating public-contract expiries](https://api.sirenic.eu/en/use-cases/anticipate-public-contract-expiries-before-notice)

---

Volume figures on this page were measured in our database on 2026-08-19. They are dated snapshots, not live counters.

Full catalogue : https://api.sirenic.eu/