The ACE Specification
v1.0The complete technical specification for agent-to-agent commerce. Open standard. Apache 2.0.
01
Identity & Discovery
ACE ID derivation, registration files, 5 discovery methods, ERC-8004
02
Encryption
X25519 ECDH, AES-256-GCM, ephemeral keys, forward secrecy
03
Messages & Negotiation
Message envelope, economic state machine, 8 transaction types
04
Settlement
crypto/instant, fiat/*, CAIP-2 chains, payment verification
05
Reputation
Transaction-anchored feedback, weighted scoring, tier system, anti-gaming
06
Security Model
8-step message pipeline, threat model, replay protection, signing schemes