IDfier for developers

Verified identities, in your product

Log customers in, check their age, verify them with a link, or have them sign contracts. Every answer comes from an identity IDfier has verified.

Read the docs Get started

curl -X POST \
  https://api.idfier.com/api/v3/business/auth/request \
  -H "clientid: $IDFIER_CLIENT_ID" \
  -H "clientsecret: $IDFIER_CLIENT_SECRET" \
  -H "Content-Type: application/json" -d '{}'

What you can build

Login with IDfier

Customers scan a QR code or tap a button, and you log them in with verified data.

Age verification

"Over 18" as a yes or no, without ever seeing the date of birth.

Verification links

Send a customer a link to verify, with nothing to build in your own UI.

EU Digital Identity Wallet

Customers share from their EU wallet instead of the IDfier app.

IDfier Sign API

Contracts your users sign with a verified identity, inside your product.

Build with AI

An MCP server for your coding assistant, plus every page as Markdown and llms.txt.