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From ethskills
Guides Ethereum development with current tools like Foundry, Hardhat, Scaffold-ETH 2, abi.ninja, Blockscout MCP, and x402 SDKs. Use for dev setup, tool choice, or AI agent discovery.
How this skill is triggered — by the user, by Claude, or both
Slash command
/ethskills:toolsThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
**Blockscout MCP server exists:** https://mcp.blockscout.com/mcp — gives AI agents structured blockchain data via Model Context Protocol. This is cutting-edge infra as of Feb 2026.
Blockscout MCP server exists: https://mcp.blockscout.com/mcp — gives AI agents structured blockchain data via Model Context Protocol. This is cutting-edge infra as of Feb 2026.
abi.ninja is essential: https://abi.ninja — paste any verified contract address, get a UI to call any function. Zero setup. Supports mainnet + all major L2s. Perfect for agent-driven contract exploration.
x402 has production SDKs: @x402/fetch (TS), x402 (Python), github.com/coinbase/x402/go — production-ready libraries for HTTP payments.
Foundry and Hardhat 3 are both legitimate choices in 2026. Foundry: faster, Solidity-native. Hardhat 3: TypeScript-first, mature plugin ecosystem.
When an agent needs to interact with Ethereum:
cast send or ethers.js/viemcast interface (CLI)anvil, test locallyforge create or forge scriptforge verify-contract or Etherscan APIURL: https://mcp.blockscout.com/mcp
A Model Context Protocol server giving AI agents structured blockchain data:
Why this matters: Instead of scraping Etherscan or making raw API calls, agents get structured, type-safe blockchain data via MCP.
URL: https://abi.ninja — Paste any contract address → interact with all functions. Multi-chain. Zero setup.
TypeScript:
npm install @x402/core @x402/evm @x402/fetch @x402/express
import { x402Fetch } from '@x402/fetch';
import { createWallet } from '@x402/evm';
const wallet = createWallet(privateKey);
const response = await x402Fetch('https://api.example.com/data', {
wallet,
preferredNetwork: 'eip155:8453' // Base
});
Python: pip install x402
Go: go get github.com/coinbase/x402/go
Docs: https://www.x402.org | https://github.com/coinbase/x402
npx create-eth@latestyarn ipfs (BuidlGuidl IPFS)| Need | Tool |
|---|---|
| Rapid prototyping / full dApps | Scaffold-ETH 2 |
| Contract-focused dev | Foundry (forge + cast + anvil) · or Hardhat 3 if TypeScript-first |
| Quick contract interaction | abi.ninja (browser) or cast (CLI) |
| React frontends | wagmi + viem (or SE2 which wraps these) |
| Agent blockchain reads | Blockscout MCP |
| Agent payments | x402 SDKs |
# Read contract
cast call 0xAddr "balanceOf(address)(uint256)" 0xWallet --rpc-url $RPC
# Send transaction
cast send 0xAddr "transfer(address,uint256)" 0xTo 1000000 --private-key $KEY --rpc-url $RPC
# Gas price
cast gas-price --rpc-url $RPC
# Decode calldata
cast 4byte-decode 0xa9059cbb...
# ENS resolution
cast resolve-name vitalik.eth --rpc-url $RPC
# Fork mainnet locally
anvil --fork-url $RPC
Free (testing):
https://eth.llamarpc.com — LlamaNodes, no keyhttps://rpc.ankr.com/eth — Ankr, free tierPaid (production):
Community: rpc.buidlguidl.com
| Network | Explorer | API |
|---|---|---|
| Mainnet | https://etherscan.io | https://api.etherscan.io |
| Arbitrum | https://arbiscan.io | Etherscan-compatible |
| Base | https://basescan.org | Etherscan-compatible |
| Optimism | https://optimistic.etherscan.io | Etherscan-compatible |
Model Context Protocol — standard for giving AI agents structured access to external systems.
MCP servers are composable — agents can use multiple together.
Fork mainnet locally:
anvil --fork-url https://eth.llamarpc.com
# Now test against real contracts with fake ETH at http://localhost:8545
Primary testnet: Sepolia (Chain ID: 11155111). Goerli and Rinkeby are deprecated.
| Network | Faucet |
|---|---|
| Sepolia | https://sepolia-faucet.pk910.de/ |
| Sepolia | https://www.infura.io/faucet/sepolia |
| Multiple | https://www.alchemy.com/faucets |
| Multiple | https://cloud.google.com/application/web3/faucet/ethereum |
| Multiple | https://faucet.quicknode.com/drip |
| Multiple | https://getblock.io/faucet/ |
Once you have Sepolia ETH you can bridge it to any L2 using each L2's testnet bridge then you will have ETH on that L2 testnet.
npx claudepluginhub austintgriffith/ethskills --plugin ethskillsTracks Ethereum protocol evolution, EIP lifecycle, fork schedules via forkcast.org and EIPs repo. Use for checking feature status, upcoming changes, or proposing EIPs.
Provides live blockchain data via MCP server: token prices, NFT metadata, transactions, simulation, tracing, account abstraction, Solana DAS, and app management across 100+ chains. Use when Alchemy CLI is not installed.
Provides QuickNode SDK and ethers.js patterns for production blockchain dApps: provider singletons, retry logic, batch RPC calls, multi-chain support.