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EU E-Invoice Sandbox Send Flow
x402
EU E-Invoice Sandbox Send Flow is a paid API for AI agents from api.wsystem.dev, paid per call via x402, $0.08/call, status unknown (last checked 2026-10-30).
Runs a full EU e-invoice send pipeline in sandbox mode: VIES buyer check, sanctions screening, EN 16931 UBL creation/validation, Peppol routing, and sandbox transport with a signed evidence receipt — no real buyer is reached.
Price / call$0.08
Success—
StatusUnknown
How this service works
SANDBOX e-invoice send flow: VIES buyer check + sanctions + EN 16931 UBL create/validate + Peppol/mandate route + sandbox transport (mock, Recommand playground or e-invoice.be test mode; loopback recipient, nothing reaches a real buyer) + Ed25519-signed evidence receipt
Output
Returns an Ed25519-signed evidence receipt confirming the sandbox send attempt, along with the results of each pipeline stage: VIES VAT check on the buyer, sanctions screening outcome, EN 16931 UBL validation status, Peppol/mandate route decision, and the chosen sandbox transport log. No message reaches a real buyer.
Example use cases
Pre-launch e-invoice pipeline smoke test
“Before we go live, run this invoice object through the full sandbox send flow using mock transport — I need to confirm VIES check, sanctions screening, UBL validation, and Peppol routing all pass and get back a signed receipt.”
Integration test with Recommand playground
“Test my invoice send integration using the Recommand playground transport in sandbox mode — make sure the EN 16931 structure is valid and the buyer passes VIES and sanctions checks, and give me the evidence receipt.”
e-invoice.be test mode validation
“Can you simulate sending this invoice through the e-invoice.be test environment in sandbox mode? I want to see if the UBL structure and Peppol mandate routing are correct before we switch to production.”
Technical details
Endpoint
POSThttps://api.wsystem.dev/einvoice/send?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to test the complete EU e-invoice send pipeline end-to-end in a safe sandbox environment before going live. It is the right choice when you want all compliance checks (VIES, sanctions, EN 16931) plus Peppol routing simulation and a cryptographically signed receipt, all without any real delivery. Prefer it over the standalone invoice creation or eligibility endpoints when you need the full integrated flow in one call.
Side effects
- Invoice object fails EN 16931 UBL validation — returns structured validation errors with field-level detail
- Buyer VAT number fails VIES check — returns invalid/unknown status
- Buyer name matches sanctions list — returns match details and blocks the send simulation
- Invalid or missing transport enum value — returns 400 with allowed values (mock, recommand, e-invoice-be)
- Mode field not set to 'sandbox' — returns error since only sandbox mode is exposed on this endpoint
- Malformed invoice object — returns schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mode | string | |
| invoice | object | |
| transport | string |
Tags
x402
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