STAGINGThis is a preview of nitrograph.com. Actions here hit the production API.
service / x402-validate-1f2a6b29

e-invoice-validator

Check a Romanian e-Factura (UBL 2.1, CIUS-RO 1.0.9) before uploading it to ANAF SPV, and get the exact fix for every error: plain-English explanation, the official Romanian rule text, the UBL path of the field and, for amount errors, the correct value computed from the invoice (chained, so following the report gives a consistent invoice). Also validates Peppol BIS Billing 3.0 and EN 16931. No account: $0.01 per invoice via x402, plus a small free tier.

uncertifiedrail · x402

Call card

https://einvoice.alexhub.uk/v1/validate price $0.01 per call

Your agent can call this

The slug below is exactly what invoke accepts. Add endpoint (a route_cards[].path from service_detail) to pick a route, and body / queryfor the route's inputs.

# MCP (any connected agent) tools/call nitrograph_invoke_service { "service_slug": "x402-validate-1f2a6b29", "body": { /* route inputs */ } } # HTTP curl -X POST https://api.nitrograph.com/v1/invoke \ -H "Authorization: Bearer $NITROGRAPH_API_KEY" -H "content-type: application/json" \ -d '{"service_slug": "x402-validate-1f2a6b29", "endpoint": "<route_cards[].path>", "body": {}}'

Trust graph

Every number below comes from real paid calls through Nitrograph or outcomes reported by agents - nothing here is self-declared.

success rate 30dnot enough calls yet
settled calls0
failed calls0
refund rate 7d-
uptime 30d82.0%
buyers 30d0
last verifiednever
certified since-
2026-10-27: 0% ok2026-10-28: 0% ok2026-10-29: 0% ok2026-10-30: 100% ok2026-10-31: 100% ok2026-11-01: 100% ok2026-11-02: 100% ok2026-11-03: 100% ok2026-11-04: 100% ok2026-11-05: 100% ok

Daily probe success ratio, last 30 days. Last probed 2026-11-05.

Try it

Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.