J Act2Labs

Data tools you can put in front of an auditor 🛡️ I build verification and compliance tooling on Apify. The common thread: these are jobs where "probably right" isn't good enough, because a wrong answer costs someone money.

What I optimise for Most data tools are judged on how much they return. Mine are judged on whether they are ever confidently wrong. Three things follow from that: 🚦 Never guessing. When an upstream service is down or throttling, my Actors report unverifiable — they do not quietly downgrade that to invalid. Conflating those two is the most expensive bug in this category. 🔬 Verified against an independent implementation. The EU VAT checksum logic is differential-tested against python-stdnum across 568,000+ generated numbers, with zero false rejections and zero false acceptances. 🔍 Built from what an API actually does, not what its docs say. Example: VIES returns every error with HTTP 200, never 4xx. Any client that trusts response.ok will mark live VAT numbers as invalid whenever the service is busy.

Live now

• EU VAT Number Validator & KYB Checker — bulk validation against the official EU VIES service. All 27 member states plus Northern Ireland, offline checksum pre-filtering so you are not billed for typos, company-name matching for KYB, and consultation numbers you can show an auditor.

In progress

• Sanctions and PEP screening against official published watchlists
• Company registry lookups and KYB enrichment

Support Found a bug, or a case I handle wrongly? Open an issue on the Actor. Reports that include the input that triggered it get fixed fastest.