# The Trustless Agentic Economy with ERC 8004 and x402 I Ed Marquez

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2026-06-09
- Duration: 32:31
- Topics: ERC-7804, X2X, A2A, agentic economy, AI agents, identity, reputation, validation, agent card, Ed Marquez, micropayments, stablecoins, facilitator, Hedera, HCS, Hashscan, USDC, smart contracts, NFT, blockchain, trustless, JSON-RPC, Express, middleware, Cloudflare, pay per crawl, agent discovery, autonomous agents, IPFS, feedback, reputation registry, identity registry, hackathon, Web3, Ethereum, EVM, agent to agent, open source
- Watch: https://streameth.org/watch/yt-NyyaTKCN03Q
- YouTube: https://www.youtube.com/watch?v=NyyaTKCN03Q

## Description

In this workshop, Ed Marquez walks through the three foundational layers needed for a trustless agentic economy: identity (ERC-7804), communication (Google's A2A protocol now under the Linux Foundation), and payments (X2X). He frames the vision of a near-future agentic web where AI agents discover, communicate with, and pay each other autonomously, and demonstrates how these three open protocols together enable that economy.

Ed does live coding demos showing each layer. For A2A, he shows how agents expose an agent card describing their skills, capabilities, and streaming support. For X2X, he demonstrates how just 15 lines of middleware can gate any Express endpoint behind stablecoin micropayments, using Cloudflare's pay per crawl initiative with publishers as a real world example. He walks through the facilitator architecture that separates blockchain execution from business logic, then combines A2A with X2X to create an AI agent that charges 1/10th of a cent per stock summary query. For ERC-7804, he covers the three registries: identity (NFT-based), reputation (score-based feedback with optional IPFS or HCS-stored details), and validation, explaining how server agents authorize clients to leave signed feedback, creating verifiable reputation that lets autonomous agents safely discover and trust each other.

00:00 Introduction
00:11 Three Pillars of the Agentic Economy
02:26 Technologies: ERC-7804, A2A, X2X
02:49 GitHub Repo Walkthrough
03:33 A2A Agents and Agent Cards
05:14 A2A Client Setup
06:00 Introduction to X2X Protocol
07:12 X2X for Micropayments and Pay Per Crawl
08:19 Implementing X2X Middleware
10:00 Combining A2A with X2X Payments
11:47 X2X Facilitator Architecture
13:33 Client Side X2X Integration
15:30 Live Demo: AI Agent with Paid A2A Endpoint
17:14 Verifying the Transaction on Hashscan
17:54 The Trust Problem in Autonomous Agents
19:46 Introduction to ERC-7804
20:58 The Three Registries: Identity, Reputation, Validation
22:23 Validation Registry Explained
23:16 Live Demo: Registering an Agent on ERC-7804
24:38 Minting the Identity NFT
25:54 Setting Agent Metadata and Trust Mechanisms
27:47 Reputation Feedback Flow
28:39 Authorizing Feedback with Signed Tokens
29:34 Feedback URIs: IPFS vs Hedera Consensus Service
31:20 Closing and Discord Call to Action

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