Monitoring a portfolio of customers or suppliers

Checking a customer at onboarding and never looking again is the most common hole in an onboarding process. Insolvency proceedings open after signature, not before. /v1/surveillance/creer sets up a watch on 1 to 100 targets, checked daily against official sources.

See a real response (free) Get the quote for /v1/surveillance/creer

What is watched

On a company target

Filings in the official legal-notices gazette, status changes, officer movements, sanctions and market-authority blacklist screening, authorisations of digital-asset service providers and asset managers, Seveso classification, and new French and EU public-procurement awards.

On a director target

New and ended directorships. Useful when the risk is not the company but the person running it — a director accumulating offices in distressed companies is a signal that watching the company alone will not give you.

Three durations, one price per target per duration

The duration is chosen at creation time (?duree= parameter): 30, 90 or 365 days. The quote is priced on two axes — number of targets × duration — and frozen before settlement. The three unit prices appear in the routes table below; they are deliberately not repeated in this text, so that they cannot go stale in it.

Renewal (/v1/surveillance/{jeton}/renouveler) accepts any duration regardless of the original one, and remains possible until 7 days after expiry — after that the watch is purged. The cibles parameter must repeat the watched targets exactly: that is what the quote is computed from.

No account, therefore no dashboard and no refund, no pro rata. Keep the token returned at creation: it is the only way to poll and renew the watch.

Three ways to be notified

• Ed25519-signed webhook: you verify the signature with our public key and know the alert really comes from us, with no shared secret to rotate.
• E-mail digest, for human use.
• Polling: the watch stays queryable at any time with its token, which spares you exposing a public endpoint to receive a webhook.

Watch, or poll occasionally?

If your portfolio is small and your rhythm monthly, /v1/entreprise/{siren}/changements?depuis=YYYY-MM-DD is enough: it returns announcements published since a date, and you only pay when you ask. A watch earns its price as soon as detection latency matters — because it checks every day, including the days you forget to ask.

The changes route detects new publications in the legal-notices gazette, not field-level edits of a company record: the identity stock is a monthly snapshot and keeps no history. Do not expect it to catch a silent address change.

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 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

Routes used and pricing

Frequently asked questions

How do I verify the webhook signature?

With our published Ed25519 public key. Verification takes a few lines in any language, and a worked example ships in our examples repository.

Can I watch a director by name?

Yes, with a target of the form dirigeant:Name. The name you pass is never logged, and the watch returns only new and ended offices from official publications — no personal data beyond what the registry publishes.

What if an official source is down for a day?

The run is deferred, not discarded. This is a design rule: an unavailable source must never produce a silence that reads as “nothing to report”. Nor can a successful-but-empty run refresh the snapshot's age — that particular disarming was identified and closed.

Take it further

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/surveillance/creer Read the route reference Get notified about euro packs

Read next

• Assessing a customer's default risk
• Detecting insolvency proceedings

Volume figures on this page were measured in our database on 2026-08-19. They are dated snapshots, not live counters. · OpenAPI · llms.txt · Full route catalogue and pricing