---
name: erc-8004-d90f8858b3a9
description: ERC-8004 Trustless Agents - Register, discover, and build reputation for AI agents on Ethereum. Use when registering agents on-chain, querying agent registries, giving/receiving reputation feedback, or interacting with the AI agent trust layer.
---

# ERC-8004: Trustless Agents

On-chain identity, reputation, and validation for autonomous agents. **Now live on Ethereum Mainnet!**

## Overview

ERC-8004 provides three registries:
- **Identity Registry** - ERC-721 agent identities with registration metadata
- **Reputation Registry** - Signed feedback scores between agents/clients
- **Validation Registry** - Independent verification (zkML, TEE, stakers)

## Quick Reference

### Register Agent
```bash
./scripts/register.sh --uri "ipfs://..." --network mainnet
./scripts/register.sh --network sepolia  # Testnet (no URI, set later)
```

### Query Agents
```bash
./scripts/query.sh total --network mainnet    # Total registered
./scripts/query.sh agent 1 --network mainnet  # Agent details
./scripts/query.sh reputation 1               # Reputation summary
```

### Update Agent
```bash
./scripts/set-uri.sh --agent-id 1 --uri "ipfs://newHash" --network mainnet
```

### Give Feedback
```bash
./scripts/feedback.sh --agent-id 1 --score 85 --tag1 "quality"
./scripts/feedback.sh --agent-id 1 --score 9977 --decimals 2 --tag1 "uptime"
```

## Networks

| Network | Status | Identity Registry | Reputation Registry |
|---------|--------|-------------------|---------------------|
| **Mainnet** | Live | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| Sepolia | Live | `0x8004A818BFB912233c491871b3d84c89A494BD9e` | `0x8004B663056A597Dffe9eCcC1965A193B7388713` |
| Base | Coming | TBD | TBD |
| Arbitrum | Coming | TBD | TBD |
| Optimism | Coming | TBD | TBD |

Contract addresses in `lib/contracts.json`. 

## Registration File Format

```json
{
  "type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1",
  "name": "your-agent-name",
  "description": "Agent description...",
  "image": "ipfs://...",
  "services": [
    { "name": "A2A", "endpoint": "https://agent.example/.well-known/agent-card.json", "version": "0.3.0" },
    { "name": "MCP", "endpoint": "https://mcp.agent.eth/", "version": "2025-06-18" },
    { "name": "ENS", "endpoint": "yourname.eth" }
  ],
  "registrations": [
    { "agentRegistry": "eip155:1:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432", "agentId": "1" }
  ],
  "supportedTrust": ["reputation", "crypto-economic", "tee-attestation"]
}
```

Template at `templates/registration.json`.

## Reputation Scores

The reputation system uses signed fixed-point numbers (`value` + `valueDecimals`):

| Tag | Meaning | Example | value | decimals |
|-----|---------|---------|-------|----------|
| starred | Quality (0-100) | 87/100 | 87 | 0 |
| uptime | Uptime % | 99.77% | 9977 | 2 |
| tradingYield | Yield % | -3.2% | -32 | 1 |
| responseTime | Latency ms | 560ms | 560 | 0 |

## Trust Models

ERC-8004 supports three pluggable trust models:
- **Reputation-based** - Client feedback with scores, tags, and metadata
- **Crypto-economic** - Stake-secured validation with economic incentives
- **Crypto-verification** - TEE attestations and zkML proofs

## Dependencies

- `cast` (Foundry) - `curl -L https://foundry.paradigm.xyz | bash`
- `jq` - `brew install jq`
- Private key in `~/.clawdbot/wallets/.deployer_pk` or `PRIVATE_KEY` env
- IPFS: Set `PINATA_JWT` for uploads, or upload manually

## Resources

### Official
- [EIP-8004 Spec](https://eips.ethereum.org/EIPS/eip-8004) - Full specification
- [8004.org](https://8004.org) - Official website
- [Reference Implementation](https://github.com/erc-8004/erc-8004-contracts) - Contract source
- [Telegram Community](https://t.me/ERC8004) - Builder chat
- [Builder Program](http://bit.ly/8004builderprogram) - Join the ecosystem

### SDKs & Tools
- [ChaosChain SDK](https://github.com/ChaosChain/chaoschain/tree/main/packages/sdk) - JS/TS SDK
- [erc-8004-js](https://github.com/tetratorus/erc-8004-js) - Lightweight JS library
- [erc-8004-py](https://github.com/tetratorus/erc-8004-py) - Python implementation
- [Vistara Example](https://github.com/vistara-apps/erc-8004-example) - Full demo with AI agents

### Ecosystem
- [Awesome ERC-8004](https://github.com/sudeepb02/awesome-erc8004) - Curated resource list
- [A2A Protocol](https://a2a-protocol.org/) - Agent-to-Agent protocol ERC-8004 extends
- [Ethereum Magicians Discussion](https://ethereum-magicians.org/t/erc-8004-trustless-agents/25098)

## Genesis Month (February 2026)

ERC-8004 launched on mainnet January 29, 2026. February is "Genesis Month" - showcasing teams building the agentic economy. Get involved!


---
Source attribution: kbarbel640-del
Original project: https://github.com/kbarbel640-del/skills/blob/e7e336ac628c3e3bd771aff1aaa469c93778f94a/skills/sp0oby/erc-8004/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 clawdbot

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: kbarbel640-del
Original project: https://github.com/kbarbel640-del/skills/blob/e7e336ac628c3e3bd771aff1aaa469c93778f94a/skills/sp0oby/erc-8004/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering, Product Management
Roles: Backend Developer, Data Engineer, Growth Product Manager, ML / AI Engineer, Product Manager
Specialties: API, Backend
Tools: Foundry, Ipfs, Jq
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 80f1b197c3be926b0b8cf586504634744bffb652510fad7d2b4142b034f897a7