ARIA Protocol
Open protocol for AI agent identity, DNS-anchored and post-quantum native, governed by a nonprofit
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- 23 no change since last check
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- Since
- 2026
ARIA is an open protocol that gives every AI agent a verifiable, cryptographically-signed identity anchored to DNS infrastructure, with four trust levels and
About ARIA Protocol
ARIA (Agent Registry for Identity & Authorization) solves the critical gap of AI agent identity across organizational boundaries. It provides every AI agent with an AID (Agent Identity Document)—a W3C Verifiable Credential cryptographically signed with ML-DSA-65 + Ed25519 composite signatures. The protocol features four trust levels from self-declared (L0, issued today) to sovereign entity-backed (L3, planned), DNS anchoring starting at L1, and a Trust Ledger recording all credential lifecycle events. ARIA AP enables agents to use their identity with services by signing requests and receiving signed receipts. Built on existing standards including W3C DIDs, W3C Verifiable Credentials, RFC 9421, and FIPS 204 post-quantum cryptography, ARIA is governed by TrustLayer Foundation, a nonprofit steward, and operationally deployed by TUNO Labs.
- cryptography
- decentralized
- open-source
- ai agents
- standards
Features worth knowing
- 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
Pricing
Pricing model: Open source
Free to use. L0 credentials issued today. L1 enabled in agent.bar demonstration. L2 and L3 specified but not yet issued.
ARIA Protocol metrics
| Metric | Value |
|---|---|
| Domain Rating | 23 no change since last check |
| Trust Flow | 7 no change since last check |
| Citation Flow | 20 no change since last check |
| Referring domains | 10 no change since last check |
| External backlinks | 24 no change since last check |
Ahrefs Domain Rating scanned 2 Nov 2026, updated 2 Nov 2026. Main topic: Business/Employment (7). Majestic scanned 2 Nov 2026, updated 2 Nov 2026. Link stats via Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
ARIA Protocol domain facts
Reveal the domain facts
| Domain age | 8 months |
|---|---|
| Registered | |
| Expires | |
| Registrar | Punto 2012 S.A.P.I. de C.V. |
| DNSSEC | Not signed |
ARIA Protocol launch results
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 23 first measured 2 Nov 2026 |
| Referring domains (Majestic) | 10 first measured 2 Nov 2026 |
Day 0 since launch. Next receipt: day 30, 2 Dec 2026. The figures report a change; they do not say what caused it, and many things can. No figure here is a guess.
Compare and explore
FAQ
- What is an AID?
- An AID (Agent Identity Document) is a W3C Verifiable Credential that contains the agent's identity, who authorized it, and the scopes it declares. It is cryptographically signed, portable, and independently verifiable, including offline.
- What are the four trust levels?
- L0 (Self-declared, issued today) provides cryptographic existence with automatic issuance via email challenge and key possession. L1 (Identified, planned) adds verified natural person and domain verification. L2 (Certified, planned) verifies the entity and links the person to it. L3 (Sovereign, planned) requires a Binding Officer, certified hardware keys, and signed accountability.
- How does DNS anchoring work?
- Starting at L1, a credential names a domain its principal has bound with one DNS TXT record, published once for all its agents. This uses the same infrastructure that has governed the internet for 40 years. L0 operates without DNS as the cryptographic entry point with zero friction.
- What cryptography does ARIA use?
- ARIA uses ML-DSA-65 + Ed25519 composite signatures (FIPS 204 + RFC 8032). Both signatures must verify. This is post-quantum native from launch, not a migration plan.
- What is ARIA AP?
- ARIA AP is how an agent uses its identity with a service. The agent checks the receiver's signed identity, signs each request with its own key, and receives a signed receipt for each operation. The receiver admits or refuses by its own rules.
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Makers
- Aaron GregoCEO of TunoLabs and Founder of TrustLayer Foundation
