# Guides Everything we have written, in French and English: concrete situations, dated factual comparisons, and one page per API route. ## Use cases (15) Fifteen concrete situations, from verifying a supplier before payment to anticipating public-contract expiries. Each page states what the routes do, what they do not do, and what the figures are worth. - [Verify a supplier before you pay them](https://api.sirenic.eu/en/use-cases/verify-supplier-before-payment-identity-vat-iban) — One call, one verdict: active company number, VAT validated live at VIES, IBAN form-checked, bank identified. No account, no API key, paid per call. - [Cross-check the identifiers printed on an invoice you received](https://api.sirenic.eu/en/use-cases/check-incoming-invoice-do-its-identifiers-contradict-each) — An invoice's VAT number can be valid at VIES yet belong to another company than the printed number. One call cross-checks all three identifiers. - [Preparing supplier master data for the French e-invoicing mandate](https://api.sirenic.eu/en/use-cases/french-e-invoicing-get-your-supplier-master-data-ready) — Reception becomes mandatory on 1 September 2026 for every VAT-liable French company. Clean 2 to 100 suppliers per call, with per-block provenance. - [Validate an intra-community VAT number](https://api.sirenic.eu/en/use-cases/validate-intra-community-vat-number-against-vies-pay-per) — Live validation against VIES for every EU member state, with the consultation identifier kept as proof. An outage is never served as an invalid number. - [Assessing a customer's default risk](https://api.sirenic.eu/en/use-cases/assess-customer-s-default-risk-with-scorecard-returned) — A 0-100 score at ~12 months, computed at call time from filed accounts, with every component, its threshold and a confidence level. - [Monitoring a portfolio of customers or suppliers](https://api.sirenic.eu/en/use-cases/monitor-customer-portfolio-daily-alerts-signed-webhook) — 1 to 100 targets checked daily against official sources, for 30, 90 or 365 days. Ed25519-signed webhook, e-mail digest, and always pollable. - [Detecting insolvency proceedings](https://api.sirenic.eu/en/use-cases/detect-insolvency-proceedings-france-europe) — Administration, liquidation, deregistration: by company number or by criteria. Czech, British and Latvian registers also covered. - [Comparing companies on official data](https://api.sirenic.eu/en/use-cases/compare-2-5-companies-per-axis-rankings-no-overall-winner) — 2 to 5 companies side by side: identity, default-risk score, latest statutory accounts, alerts. A comparability block flags when the comparison is meaningless. - [Automating business verification (KYB)](https://api.sirenic.eu/en/use-cases/kyb-automated-business-verification-with-per-block) — One call returns a full file on a French company: identity, officers, legal alerts, accounts, sanctions screening — each block with its provenance. - [Screening a counterparty against sanctions lists](https://api.sirenic.eu/en/use-cases/screen-name-against-6-official-sanctions-lists) — UN, EU, OFAC, United Kingdom, French asset freezes, Swiss SECO. Fuzzy matching with a 0-100 confidence score per hit — never a bare yes/no. - [Identifying a company's beneficial owners](https://api.sirenic.eu/en/use-cases/beneficial-owners-open-uk-latvia-closed-france) — The UK PSC register and the Latvian register, live and as open data. For France, only ownership from filed articles of association is available. - [Checking a provider's authorisation](https://api.sirenic.eu/en/use-cases/check-financial-firm-s-authorisation-eba-eiopa-esma-arcep) — Payment, e-money, insurance, telecoms, asset management, crypto: three official registers by company number, plus the ESMA registers by name. - [Anticipating public-contract expiries](https://api.sirenic.eu/en/use-cases/anticipate-public-contract-expiries-before-notice) — Buyers typically re-tender 4 to 9 months before expiry. Filter contracts ending inside your window by CPV segment and department, with the incumbent holder. - [Building a B2B prospecting list](https://api.sirenic.eu/en/use-cases/build-b2b-prospecting-list-from-official-french-registry) — Multi-criteria filters over the complete registry: activity, area, legal form, workforce, age, certifications. 100 active companies per page. - [Querying European company registers](https://api.sirenic.eu/en/use-cases/european-company-data-thirteen-official-registers-one-schema) — One response shape for thirteen countries, plus what each register does not publish. Belgian, Danish, British and Swedish annual accounts. ## Comparisons (6) Six comparisons with dated, sourced facts. Each starts with what the other service does better than us, and two of them recommend not choosing us. - [Sirenic or Pappers: which one for which need](https://api.sirenic.eu/en/compare/sirenic-or-pappers-credits-versus-pay-per-call-compared) — Surveyed on a paid Pappers account: credit cost per field, whether scoring is recomputed, PEP coverage. Dated facts, sources cited. - [Sirenic or Societe.com](https://api.sirenic.eu/en/compare/sirenic-or-societe-com-public-pricing-versus-quotation) — Their API is quotation-based, IP-restricted, capped at 60 requests per minute. Ours is publicly priced and callable without an account. - [Sirenic or Infogreffe](https://api.sirenic.eu/en/compare/sirenic-or-infogreffe-we-do-not-issue-kbis-extracts) — Regulated prices surveyed 2026-08-19: Kbis €3.06, annual accounts €9.08, statement of charges up to €62.88. What the court registry does and we never will. - [Sirenic or API Entreprise (DINUM)](https://api.sirenic.eu/en/compare/sirenic-or-api-entreprise-if-you-are-public-body) — API Entreprise is reserved for public bodies, free, and grants access to certificates the private sector cannot obtain. - [Sirenic or the INPI register directly](https://api.sirenic.eu/en/compare/sirenic-or-inpi-directly-source-is-free-ingesting) — French national register data is free over API and SFTP, with an account. This comparison honestly says when you should ingest it yourself rather than pay us. - [Sirenic or the free company-search API](https://api.sirenic.eu/en/compare/sirenic-or-free-french-company-search-api) — Free, key-less, 52 search criteria, 7 requests per second. To find a company number, pay nothing. Here is exactly where it stops, measured on a real call. ## API reference (80) One page per route in the pricing grid, with its price, an extract from a genuinely paid response, the expected identifier format and what the route does not do. - [API reference](https://api.sirenic.eu/en/api) --- [Home](https://api.sirenic.eu/en) · [Pricing](https://api.sirenic.eu/en/offres) · [Guides](https://api.sirenic.eu/en/articles) · [Routes](https://api.sirenic.eu/en/api) · [Legal notice](https://api.sirenic.eu/mentions-legales) · [Privacy](https://api.sirenic.eu/confidentialite)