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.
See a real response (free) Get the quote for /v1/entreprise/{siren}/concurrents-marches
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.
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.
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, 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: $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.
# 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/v1/entreprise/{siren}/marches-publics — $0.01/v1/acheteur/{siret}/profil — $0.02Every 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 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 and in 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| Route | Price | What it returns |
|---|---|---|
/v1/entreprise/{siren}/concurrents-marches (free sample) | $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.
No account to create, no key to request: the first step is free and shows you exactly what you would be buying.
See a real response (free) Get the quote for /v1/entreprise/{siren}/concurrents-marches Get notified about euro packs