Universal Trust Adapter

The Universal Trust Adapter (UTA) is the USB-C of agent trust. It translates between 8 trust credential formats via a canonical Universal Trust Schema (UTS v2.0.0).

UTA enables AI agents using different trust systems to verify each other without changing their native format.

ATC (Agent Trust Card) — our native format

EAT-AI (Entity Attestation Token for AI)

ZTA (Zero-Trust Architecture)

A2A (Agent-to-Agent)

MCP Card (Model Context Protocol)

W3C VC (Verifiable Credentials)

OAuth (Bearer token)

SPIFFE (Secure Production Identity Framework)

12 verification stages ensure trust cards are valid, fresh, and authorized.

Ed25519 signatures (RFC 8032) for cryptographic integrity.

RFC 8785 JCS for canonical JSON serialization.

23/23 conformance tests passing.

Reference implementation: github.com/alicelabs-llc/universal-trust-adapter

Language: TypeScript

License: MIT

npm: @marketnow/trust-adapters@1.0.1

npm install @marketnow/trust-adapters

import { TrustAdapter } from '@marketnow/trust-adapters'

const adapter = new TrustAdapter({ format: 'ATC' })

const verified = await adapter.verify(trustCard)