Open protocol for AI agent identity, DNS-anchored and post-quantum native, governed by a nonprofit
Stage
Not given
Startup
Founded
Not given
2026
Based in
Not given
MX
Pricing model
Freemium
Open source
Pricing
Free plan available. hark pro² at $20/month with 2× more usage. hark pro³ at $100/month with 10× more usage. All features available in all plans; upgrading increases usage capacity.
Free to use. L0 credentials issued today. L1 enabled in agent.bar demonstration. L2 and L3 specified but not yet issued.
Key features
Persistent memory to tailor responses based on shared context
Computer use agent for browsing, research, and web tasks
End-to-end encryption for data security
Action Buttons for prioritized task completion
Email management and sorting
Flight booking and travel planning
Food ordering integration
Appointment booking and healthcare search
Expense auditing and savings recommendations
W3C Verifiable Credentials (AID format)
Four trust levels (L0-L3) with progressive verification
DNS anchoring starting at L1
ML-DSA-65 + Ed25519 composite signatures
ARIA AP for signed requests and receipts
Append-only Trust Ledger with credential lifecycle events
Revocation capability with signed status lists
Public REST API verification endpoint
TypeScript SDK for credential verification
What makes it different
Operates its own secure computer with full browser for independent task execution
End-to-end encryption vault for sensitive data protection
User approval required before performing sensitive actions
All features available across free and paid tiers
Post-quantum native from launch, not a migration plan
Governed by nonprofit to prevent capture
Complements existing protocols without replacing them
Hark
ARIA Protocol