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Toll402

Offline validator for an Irish PPSN (Personal Public Service Number): checks the 7-digit + 1 check-letter (+ optional trailing 'A' or 'H' modifier letter) format and verifies the check letter using the published mod-23 weighted-sum algorith

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
142 ms
Price
$0.001 per call
Paying buyers, last 30 days
2 (directory's own records)
Paid calls, last 30 days
2
Category
Developer tools and utilities
Address
https://toll402.dev/v1/t/ppsn_ie_validate

Accuracy: paid answers checked against an independent record

Not yet in our paid checks. A seller we have not checked has neither passed nor failed.

For agents

This page as JSON: /sellers/d74a8834af4f.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].