erc8004-avalanche

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Register and manage AI agent identities on Avalanche C-Chain using ERC-8004 (Trustless Agents). Use this skill when the user wants to register an AI agent on-chain, give or read reputation feedback, request validation, or interact with ERC-8004 identity/reputation/validation registries on Avalanche mainnet or Fuji testnet.

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Sourcecolombia-blockchain/agent-skills
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NPX Install

npx skill4agent add colombia-blockchain/agent-skills erc8004-avalanche

Tags

Translated version includes tags in frontmatter
ai-agent-identityerc-8004avalanche-c-chainreputation-systemon-chain-validation

SKILL.md Content

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ERC-8004: Trustless Agents on Avalanche

Register your AI agent on Avalanche C-Chain with a verifiable on-chain identity, making it discoverable and enabling trust signals through reputation and validation.

What is ERC-8004?

ERC-8004 is an Ethereum standard for trustless agent identity and reputation, deployed on Avalanche:
  • Identity Registry - ERC-721 based agent IDs (your agent gets an NFT)
  • Reputation Registry - Feedback and trust signals from other agents/users
  • Validation Registry - Third-party verification of agent work
Website: https://www.8004.org | Spec: https://eips.ethereum.org/EIPS/eip-8004

Contract Addresses

ChainIdentity RegistryReputation Registry
Avalanche Mainnet (43114)
0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
0x8004BAa17C55a88189AE136b182e5fdA19dE9b63
Avalanche Fuji (43113)
0x8004A818BFB912233c491871b3d84c89A494BD9e
0x8004B663056A597Dffe9eCcC1965A193B7388713
Explorer links:

Quick Start

1. Register Your Agent

bash
# Set environment variables
export AVALANCHE_RPC_URL="https://api.avax.network/ext/bc/C/rpc"
export PRIVATE_KEY="your-private-key"

# Register with a URI pointing to your agent's registration file
./scripts/register.sh "https://myagent.xyz/agent.json"

# Or register with IPFS (requires PINATA_JWT)
export PINATA_JWT="your-pinata-jwt"
./scripts/register.sh "ipfs"

2. Check Agent Registration

bash
# Check if an agent is registered and get its info
./scripts/check-agent.sh <agent-id>

3. Give Feedback

bash
# Give reputation feedback to an agent
./scripts/give-feedback.sh <agent-id> <value> <tag1> <tag2>

Registration File Format

Your agent's registration file (see 
assets/templates/registration.json
):
json
{
  "type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1",
  "name": "My Avalanche Agent",
  "description": "An AI agent operating on Avalanche",
  "image": "https://example.com/avatar.png",
  "services": [
    { "name": "web", "endpoint": "https://myagent.xyz/" },
    { "name": "A2A", "endpoint": "https://myagent.xyz/.well-known/agent-card.json", "version": "0.3.0" },
    { "name": "MCP", "endpoint": "https://mcp.myagent.xyz/", "version": "2025-06-18" }
  ],
  "x402Support": false,
  "active": true,
  "registrations": [
    {
      "agentId": 1,
      "agentRegistry": "eip155:43114:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"
    }
  ],
  "supportedTrust": ["reputation"]
}

Key Concepts

Agent Identity (ERC-721 NFT)

  • Each agent gets a unique 
    agentId
    (tokenId) on registration
  • The NFT owner controls the agent's profile and metadata
  • Agents are globally identified by 
    eip155:43114:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
    + 
    agentId

Reputation System

  • Anyone can give feedback (except the agent owner themselves)
  • Feedback includes a value (int128) with decimals (0-18) plus optional tags
  • Common tags: 
    starred
    (quality 0-100), 
    reachable
    (binary), 
    uptime
    (percentage)
  • Feedback can be revoked by the original submitter
  • Agents can append responses to feedback

Validation

  • Agents request validation from validator contracts
  • Validators respond with a score (0-100)
  • Supports stake-secured re-execution, zkML, TEE attestation

Environment Variables

VariableDescriptionRequired
AVALANCHE_RPC_URL
Avalanche C-Chain RPC endpointYes (defaults to public RPC)
PRIVATE_KEY
Wallet private key for signing transactionsYes
PINATA_JWT
Pinata API JWT for IPFS uploadsNo (only for IPFS registration)
AGENT_NAME
Agent display nameNo
AGENT_DESCRIPTION
Agent descriptionNo
AGENT_IMAGE
Avatar URLNo
SNOWTRACE_API_KEY
Snowtrace API key for verificationNo

Avalanche Network Details

ParameterMainnetFuji Testnet
Chain ID4311443113
RPC URL
https://api.avax.network/ext/bc/C/rpc
https://api.avax-test.network/ext/bc/C/rpc
Explorerhttps://snowtrace.iohttps://testnet.snowtrace.io
CurrencyAVAXAVAX (test)
Faucet-https://faucet.avax.network

Workflow

  1. Get AVAX - You need AVAX for gas fees (~0.01-0.05 AVAX for registration)
  2. Create Registration File - Generate a JSON following the registration format
  3. Upload to IPFS (optional) - Pin via Pinata or host at any URL
  4. Register On-Chain - Call 
    register(agentURI)
    on the Identity Registry
  5. Set Metadata - Optionally set on-chain metadata and agent wallet
  6. Receive Feedback - Other agents/users can give reputation signals
  7. Request Validation - Optionally request third-party verification

Using with cast (Foundry)

bash
# Register an agent with a URI
cast send 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432 \
  "register(string)" "https://myagent.xyz/agent.json" \
  --rpc-url https://api.avax.network/ext/bc/C/rpc \
  --private-key $PRIVATE_KEY

# Read agent URI
cast call 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432 \
  "tokenURI(uint256)" 1 \
  --rpc-url https://api.avax.network/ext/bc/C/rpc

# Give feedback (value=85, decimals=0, tag1="starred")
cast send 0x8004BAa17C55a88189AE136b182e5fdA19dE9b63 \
  "giveFeedback(uint256,int128,uint8,string,string,string,string,bytes32)" \
  1 85 0 "starred" "" "" "" 0x0000000000000000000000000000000000000000000000000000000000000000 \
  --rpc-url https://api.avax.network/ext/bc/C/rpc \
  --private-key $PRIVATE_KEY

# Get reputation summary
cast call 0x8004BAa17C55a88189AE136b182e5fdA19dE9b63 \
  "getSummary(uint256,address[],string,string)" \
  1 "[0xREVIEWER_ADDRESS]" "starred" "" \
  --rpc-url https://api.avax.network/ext/bc/C/rpc

Using with viem/ethers.js

See 
references/api-reference.md
for complete TypeScript examples.

Links