Protocol Hub · v1.1.2

# The Agentic Protocol Stack

Harmonizing global commerce standards with deterministic remediation logic.

01 — Aizii Core Protocols

## The Deterministic Truth Layer

Three proprietary protocols that close the gap between standards and settlement.

[

DDP

### Deterministic Data Protocol

The settlement-grade truth layer. Guarantees that every product fact an agent reads is verifiable, immutable, and transactable.

View SpecificationWatch Deep Dive

](https://aizii.ai/protocols/ddp)[

SVP

### Semantic Verification Protocol

Continuous validation across UCP, ACP, and MCP schemas. Detects drift, repairs mismatches, and certifies agent-readable inventory.

View SpecificationWatch Deep Dive

](https://aizii.ai/protocols/svp)[

FHP

### Fiduciary Handshake Protocol

Establishes trust between brand, agent, and settlement rail — enforcing fiduciary obligations at the moment of autonomous purchase.

View SpecificationWatch Deep Dive

](https://aizii.ai/protocols/fhp)

02 — Industry Integration Layer

### External Standards Bridged by Aizii

[

Google AP2

The Agent Payments Protocol

Reference Documentation →](https://aizii.ai/protocols/google-ap2)[

Google UCP

Universal Commerce Protocol

Reference Documentation →](https://aizii.ai/protocols/google-ucp)[

OpenAI ACP

Agentic Commerce Protocol

Reference Documentation →](https://aizii.ai/protocols/openai-acp)[

x402

The Agentic Settlement Standard

Reference Documentation →](https://aizii.ai/protocols/x402)[

MCP

Model Context Protocol

Reference Documentation →](https://aizii.ai/protocols/mcp)[

W3C Verifiable Credentials

The Identity Standard

Reference Documentation →](https://aizii.ai/protocols/w3c-vc)

AEO Protocol · v1.1.2 · Truth Layer Status: Active

_Last modified: 2026-08-13_