France mandates e-invoicing from Sept 2026, pushing developers to verify supplier data

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France will require all businesses to receive electronic invoices starting September 1, 2026, with full issuance obligations phased in by 2027 under the Loi de finances pour 2024. The mandate means that AI agents handling supplier payments must verify three key data points before processing: whether the supplier is still active, whether its intra-EU VAT number is currently valid, and whether its IBAN corresponds to a real, registered bank. A third-party API service called Sirenic offers a single endpoint that checks all three conditions simultaneously for $0.03 per call, returning a simple boolean verdict alongside a closed list of blocking or informational reason codes. The API uses the x402 micropayment protocol, meaning no account or API key is required — callers pay per request using USDC or EURC on the Base blockchain. A second endpoint, available since August 16, allows verification of identifiers printed on received invoices to detect mismatches between VAT numbers and company SIRENs.

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