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Getting Started

Build Self-Sovereign Identity applications with TypeScript - the simple way.

What is SSI?​

Self-Sovereign Identity lets people own their digital credentials (like diplomas, licenses, certifications) without relying on centralized systems.

Think of it like this:

  • Universities issue digital diplomas directly to students
  • Students store credentials securely in their digital wallet
  • Employers verify credentials instantly without calling the university

Four Core SDKs​

We've made SSI development simple with four focused SDKs:

Issuer SDK - Issue Credentials​

For: Universities, employers, government agencies, certification bodies
Purpose: Issue verifiable credentials following OpenID4VCI Draft-17 standards
Key Features:

  • Session management for OpenID4VCI flows
  • Multiple credential formats (JSON-LD, JWT)
  • Cryptographic proof validation from holders
  • Deferred issuance workflows
  • Builder patterns for offers, tokens, approvals

Wallet SDK - Store & Manage Credentials​

For: Mobile apps, browser extensions, desktop wallets, user-facing applications
Purpose: HD wallet with secure credential storage and DID management
Key Features:

  • BIP32/BIP39 hierarchical deterministic keys
  • Encrypted mnemonic storage with PBKDF2 + AES
  • DID generation and cryptographic operations
  • Credential management and activity tracking
  • JWT proof creation for presentations

Verifier SDK - Verify Credentials​

For: Employers, service providers, applications requiring identity verification
Purpose: Complete OpenID4VP Draft-24 verification with presentation definitions
Key Features:

  • Presentation definition creation with constraints
  • QR code generation for mobile wallet interaction
  • Cryptographic verification of credentials and signatures
  • OAuth2-style token exchange after verification
  • Session management for verification flows

DID Core SDK - Identity Infrastructure​

For: All applications - this is the foundation that powers the other SDKs
Purpose: Universal DID operations supporting multiple DID methods
Key Features:

  • DID:key method for cryptographic self-sovereign identities
  • DID:web method for web-based decentralized identities
  • DID document creation, validation, and management
  • Universal DID resolution across methods
  • Integration with W3C DID specifications

Why Developers Love It​

Real APIs - All examples use actual working code from the packages
TypeScript first - Complete type safety and IntelliSense
Standards compliant - W3C Verifiable Credentials, OpenID4VCI Draft-17, OpenID4VP Draft-24
Production ready - Professional architecture with proper abstractions
Framework agnostic - Works with React, Vue, Express, Next.js

Note: The examples above show the actual APIs. Each SDK requires some setup, but the complexity is hidden behind well-designed abstractions. The "Quick Start" sections in each SDK guide show minimal working examples.

Get Started Now​

Choose your path:

I want to issue credentials​

→ Issuer SDK Guide

I want to build a wallet​

→ Wallet SDK Guide

I want to verify credentials​

→ Verifier SDK Guide

I want to work with DIDs directly​

→ DID Core SDK

I want to understand the architecture​

→ Package Overview