# Building for the On Chain Agent Economy I Goutham Deva, Nalin Mittal - Channel: [ETHGlobal](https://streameth.org/ethglobal) - Date: 2026-08-09 - Duration: 24:01 - Topics: ERC-8004, Google Cloud, Nalin Mittal, Goutham Deva, ETHGlobal New York 2026, agent economy, AI agents, agentic commerce, agentic payments, trust, identity, reputation, validation, BigQuery, Ethereum dataset, SQL, on-chain data, NFT, agent ID, registry, MCP, A2A, x402, service endpoints, feedback, leaderboard, MetaMask, Ethereum Foundation, Coinbase, smart contracts, Web3, faucets, datasets, Base, Gemini, indexing, analytics, explorer, prizes, hackathon, workshop - Watch: https://streameth.org/watch/yt-ETJHX1DlVIQ - YouTube: https://www.youtube.com/watch?v=ETJHX1DlVIQ ## Description In this workshop at ETHGlobal New York 2026, Nalin Mittal and Goutham Deva from Google Cloud's Web3 team present building for the on-chain agent economy, centered on ERC-8004 and accessing its data through BigQuery. Nalin, who leads Web3 product efforts, notes Google Cloud has built Web3 products since 2018, with BigQuery datasets for over 40 blockchains, faucets for many test networks, and growing agentic access. He frames the core problem: as agents gain autonomy and begin purchasing from and delegating to other agents, real-time markets will form on the fly, but you cannot extend trust across organizational boundaries without knowing who you are dealing with. Standards like MCP (for tools and services) and Google's A2A (agent-to-agent communication) exist, but the trust piece is still missing, and ERC-8004 bridges that gap. Goutham and Nalin explain that ERC-8004, built in collaboration with MetaMask, the Ethereum Foundation, and Coinbase and live on Ethereum mainnet since January 29 (and other chains), establishes three pieces. Identity: calling a register event mints an NFT tied to the agent and returns an agent ID, with the metadata holding a name, description, and most importantly the service endpoints (A2A, MCP), whether it supports x402, and which trust models it uses. Reputation: a give-feedback contract method lets anyone leave on-chain, public feedback (star ratings, uptime, response times) via open-ended tags. Validation: still a work in progress, a way to prove an agent did the work it claimed via a third-party validator and hash. They then show how to access the 8004 data through Google's BigQuery Ethereum dataset (indexed from genesis to chain tip, with a generous 1 TB free tier plus a $1,000 coupon for the track), walking through live SQL queries for registrations per day, decoding a register event, a reputation leaderboard, and an x402 join showing which agents support x402. Nalin lays out the $5,000 cash prize for applications leveraging the identity and reputation data (like an explorer or analytics dashboard), and closes with Q&A on monetization (none, it is an open registry), available datasets like Base, how feedback works, spam, and whether the spec extends beyond agents. 00:00 Introduction 00:11 Meet Nalin and Google Cloud Web3 00:54 Meet Goutham 01:16 How the Workshop Is Structured 01:40 The $5,000 Prize 02:01 Why Agents Need Trust 02:23 Delegation and Real-Time Agent Markets 02:41 MCP, A2A, and the Missing Trust Piece 03:39 Trusting Agents Across Organizations 04:01 The Three Pieces of ERC-8004 04:36 Built With MetaMask, EF, and Coinbase 04:54 Identity: Registering an Agent 05:34 What the Agent File Contains 05:55 Service Endpoints and x402 Support 06:18 Reputation: Giving Feedback 06:39 Why Tags Are Open-Ended 07:05 Building a Reputation System 07:15 Validation: Proving Work Was Done 07:58 The Identity and Reputation Registries 08:21 The BigQuery Ethereum Dataset 08:47 The Free Tier and $1,000 Coupon 09:30 How to Set Up Access 10:14 Walking Through Live Queries 11:29 Understanding the Dataset Fields 11:50 Query: Registrations Per Day 12:24 Query: Decoding a Register Event 13:12 Reading the Agent URI 13:58 Decoding Input Data on the Contract 14:22 Query: Reputation Leaderboard 14:52 Query: The x402 Join 15:55 More on the Prize 16:15 What a Winning Application Looks Like 17:01 Where to Find Resources 17:24 Q&A: Plans to Monetize 8004 18:11 Q&A: Datasets for Base and BNB 18:41 Q&A: What Is 8004 19:36 Q&A: Interesting Findings in the Agents 19:52 Q&A: How Leaving Feedback Works 21:00 Q&A: Judging and Spam 22:00 Q&A: Does the Spec Go Beyond Agents 23:11 Closing _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ *ETHGlobal New York 2026* This workshop is specifically for ETHGlobal New York 2026, a 3-day hackathon held June 12-14 at the Metropolitan Pavilion, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! 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