Tessio

Tessio is an age and identity verification API built on the EU Digital Identity Wallet.

Most age assurance today means uploading an ID document or taking a selfie. That solves the regulator's problem by creating a data protection one, because you then hold identity data you have to secure, justify and disclose if it leaks.

Tessio asks a narrower question. One API call starts an over 18 check, the user approves it in their wallet, and a signed result lands on your webhook. The credential we request is the EU age verification attestation, which carries age booleans and nothing else: the specification forbids it from holding any other attribute. There is nothing to store, because there is nothing to receive.

Built for platforms that need to meet the UK Online Safety Act and the EU Digital Services Act without becoming a custodian of identity data. The verifier underneath is open source .NET, Apache-2.0, on NuGet, so you can self host it or read exactly what it does. It passes the OpenID Foundation conformance suite for OpenID4VP 1.0 HAIP verifiers, in both credential formats the EU wallet uses.

Member states must make the wallet available by December 2026 under Regulation (EU) 2024/1183, and regulated relying parties must accept it by December 2027.

Stage, plainly: age checks from the EU age verification app work in production today, with each attestation checked against the age verification trusted list the Commission publishes. Denmark is the first country on that list, so live coverage starts there, and test mode works from any member state. The EU Digital Identity Wallet is a separate path and it is still gated, because that wallet checks who is asking before it releases anything, so it needs a relying party access certificate, which we applied for on 5 August 2026 and do not yet hold. Signup is open and a test project works as soon as you create one. Sending real traffic needs us to switch your organisation to live mode, so that part stays a conversation.