hermesonehq/hermes-registry/chainlink-agent-skills

Chainlink Agent Skills

Overview

Official Chainlink agent skills on the agentskills.io spec, maintained by Chainlink / Smart Contract Kit. Covers oracle network data feeds, CCIP (Cross-Chain Interoperability Protocol) cross-chain messaging, and smart contract interaction — the foundational Web3 infrastructure layer used by most major DeFi protocols.

When to Use

• Fetching real-time price feeds (ETH/USD, BTC/USD, 500+ pairs) from Chainlink Data Feeds
• Initiating or monitoring cross-chain token transfers and messages via CCIP
• Querying Chainlink Functions for off-chain computation results
• Verifying Chainlink VRF (Verifiable Random Function) outputs
• Building or debugging smart contracts that consume Chainlink oracles
• Don't use for: direct wallet transactions (use a wallet skill), on-chain analytics (use hermes-blockchain-oracle)

Installation

hermes skills install smartcontractkit/chainlink-agent-skills

Or via direct URL:

hermes skills install https://raw.githubusercontent.com/smartcontractkit/chainlink-agent-skills/main/SKILL.md

Skill Areas

Data Feeds

Real-time and historical price data from Chainlink's decentralized oracle network:

"What is the current ETH/USD price from Chainlink?"
"Get the BTC/USD price feed on Arbitrum"
"Show me the last 10 rounds for the LINK/ETH feed on Mainnet"

Supported networks: Ethereum Mainnet, Arbitrum, Optimism, Polygon, Avalanche, BNB Chain, Base, and more.

CCIP (Cross-Chain Interoperability Protocol)

"Send 100 USDC from Ethereum to Arbitrum via CCIP"
"Check the status of CCIP message 0xabc..."
"What are the supported CCIP lanes from Ethereum Mainnet?"
"Estimate the CCIP fee for a cross-chain transfer"

Chainlink Functions

Off-chain computation with on-chain verification:

"Call a Chainlink Function to fetch weather data and store on-chain"
"Check the result of Functions request ID 0x123..."

VRF (Verifiable Random Function)

"Request a verifiable random number for my NFT mint contract"
"Check the status of VRF request 0xdef..."

Configuration

Set your RPC endpoints for the networks you want to interact with:

export ETH_MAINNET_RPC=https://mainnet.infura.io/v3/YOUR_KEY
export ARBITRUM_RPC=https://arb1.arbitrum.io/rpc
export POLYGON_RPC=https://polygon-rpc.com

For CCIP and Functions, you'll also need a funded wallet:

export PRIVATE_KEY=0x...   # Never commit this — use .env

Common Pitfalls

1. RPC rate limits. Free RPC endpoints (Infura, Alchemy free tier) have rate limits. Use a paid tier or self-hosted node for production workloads.
2. CCIP lane not supported. Not all chain pairs have active CCIP lanes. Check docs.chain.link/ccip/supported-networks for the current lane matrix.
3. Stale price feed. Chainlink feeds have a heartbeat (typically 1h or 24h). If updatedAt is older than the heartbeat, the feed may be paused — handle this case in production.
4. Gas estimation. CCIP transfers require gas on both the source and destination chain. Ensure wallet has native tokens on both chains.
5. Private key in env. Never hardcode PRIVATE_KEY in code. Use .env with .gitignore or a secrets manager.

Verification Checklist

• [ ] Skill installed: hermes skills list | grep chainlink
• [ ] RPC endpoint set and accessible: test with a simple eth_blockNumber call
• [ ] Data feed query returns current price: "Get ETH/USD price from Chainlink on Mainnet"
• [ ] CCIP lane available for intended chain pair (if using cross-chain)
• [ ] Wallet funded with native tokens on source chain (if using CCIP/Functions)