Skip to main content
One identity. Verified everywhere. Authenticate and sign digital actions without passwords or centralized control.

​
Get started in minutes

Everything you need to integrate biometric authentication and legally binding signatures.

Getting Started

Set up your first authentication flow in under 5 minutes

API Reference

Complete API documentation with request/response examples

What is UIP?

Learn how UIP works and why it’s better than passwords

View Pricing

Simple, usage-based pricing with no subscriptions

​
Three powerful APIs

Modular APIs that work together seamlessly. Pick what you need.

Identify API

Authenticate users with biometrics$0.01 per identification

Sign API

Request legally binding signatures$0.03 per signature

Message API

Send encrypted messages to users$0.05 per message

​
Why UIP?

Built for the modern web. From passwordless authentication to legally binding signatures.
Mobile-only authentication with fingerprint or face recognition. Your cryptographic keys live on your device. No centralized control, no passwords to manage or reset.
Government ID verification via official documents and biometric checks. Legally binding signatures with permanent audit trails. Court-admissible evidence generation.
Works across borders, governments, and businesses. One identity for authentication and signing, globally. GDPR compliant with zero-knowledge architecture.
Composable APIs that work together seamlessly. Pick what you need: authentication, signing, messaging, or verification. Usage-based pricing, no subscriptions.

​
Key features

Everything you need for secure identity and signatures.

Biometric Security

100% biometric recognition accuracy with local device processing

256-bit Encryption

AES-256 encryption with zero-knowledge design

< 500ms Response

Lightning-fast authentication and signature requests

99.9% Uptime SLA

Enterprise-grade reliability and availability

Permanent Audit Trail

Every action generates immutable, verifiable records

QR Code Flow

Simple scan-and-approve UX that users love

​
Start building today

Get your API keys

Get $5 in credits when you join UIP to try it out. No credit card required.