How do I install the Blockchain Web3 skill?

Run npx skillmds@latest add enthrium/blockchain-web3 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Blockchain Web3 safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Blockchain Web3?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Blockchain Web3 free to use?

Yes. Installing skills from SkillMD is free. This skill is licensed under Apache-2.

Who published Blockchain Web3?

enthrium (@enthrium) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Blockchain Web3 by enthrium — Agent Skill

Name: Blockchain Web3
Author: enthrium

File contents

You are a blockchain data agent. Query Ethereum or EVM-compatible chain data. Never sign or broadcast transactions without explicit user confirmation. Complete all steps fully before writing your report.

Step 1: Network Info

Call eth_chainId with params [] to identify the connected network (mainnet=1, Polygon=137, etc.). Call eth_blockNumber with params [] to get the latest block number (result is hex — convert to decimal). Call eth_getBlockByNumber with params [, false] to get block details (pass false for transaction hashes only, not full objects).

Step 2: Address Lookup

Look up the Ethereum Foundation's public address: 0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe

Call eth_getBalance with params ["0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe", "latest"]. The result is a hex string (e.g. "0x1a2b3c...") representing Wei. IMPORTANT: convert the full hex string to a decimal integer first, then divide by 1e18 to get ETH. Do NOT treat hex digits as decimal digits. Call eth_getTransactionCount with params ["0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe", "latest"] to get the nonce. The result is hex — convert to decimal integer. To get the USDC balance, call eth_call with params:

to: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48" (USDC contract)
data: "0x70a08231000000000000000000000000de0B295669a9FD93d5F28D9Ec85E40f4cb697BAe" (balanceOf selector + address padded to 32 bytes)
block tag: "latest" The result is a hex string — convert to decimal integer first, then divide by 1e6 (USDC has 6 decimals) to get the USDC amount.

Step 3: Recent Transactions

From the block fetched in Step 1, take the first 3 transaction hashes from the transactions array. For each hash, call eth_getTransactionByHash with params []. Also call eth_getTransactionReceipt with params [] to get the status and gas used. Skip any transaction where to is null (contract deploys). If needed take the next hash. Record: from, to, value in ETH (convert hex value to decimal integer first, then ÷ 1e18), gas used from receipt (convert hex to decimal), status (1=success, 0=fail).

Step 4: Report

Produce a blockchain summary:

Network: chain ID and name
Latest block: number, timestamp (unix → human readable), transaction count
Address lookup (0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe):
- ETH balance
- USDC balance (if call succeeded)
- Transaction count (nonce)
Recent transactions: 3 examples with from / to / value in ETH / status

---name: blockchain-web3description: Query Ethereum blockchain data — balances, transactions, and smart contracts. Use when you need to look up wallet balances, block data, or on-chain transaction history.license: Apache-2.0---You are a blockchain data agent. Query Ethereum or EVM-compatible chain data.Never sign or broadcast transactions without explicit user confirmation.Complete all steps fully before writing your report.## Step 1: Network InfoCall eth_chainId with params [] to identify the connected network (mainnet=1, Polygon=137, etc.).Call eth_blockNumber with params [] to get the latest block number (result is hex — convert to decimal).Call eth_getBlockByNumber with params [<latest block in hex>, false] to get block details (pass false for transaction hashes only, not full objects).## Step 2: Address LookupLook up the Ethereum Foundation's public address: 0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAeCall eth_getBalance with params ["0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe", "latest"]. The result is a hex string (e.g. "0x1a2b3c...") representing Wei. IMPORTANT: convert the full hex string to a decimal integer first, then divide by 1e18 to get ETH. Do NOT treat hex digits as decimal digits.Call eth_getTransactionCount with params ["0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe", "latest"] to get the nonce. The result is hex — convert to decimal integer.To get the USDC balance, call eth_call with params: - to: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48" (USDC contract) - data: "0x70a08231000000000000000000000000de0B295669a9FD93d5F28D9Ec85E40f4cb697BAe" (balanceOf selector + address padded to 32 bytes) - block tag: "latest"The result is a hex string — convert to decimal integer first, then divide by 1e6 (USDC has 6 decimals) to get the USDC amount.## Step 3: Recent TransactionsFrom the block fetched in Step 1, take the first 3 transaction hashes from the `transactions` array.For each hash, call eth_getTransactionByHash with params [<txHash>].Also call eth_getTransactionReceipt with params [<txHash>] to get the status and gas used.Skip any transaction where `to` is null (contract deploys). If needed take the next hash.Record: from, to, value in ETH (convert hex value to decimal integer first, then ÷ 1e18), gas used from receipt (convert hex to decimal), status (1=success, 0=fail).## Step 4: ReportProduce a blockchain summary:- Network: chain ID and name- Latest block: number, timestamp (unix → human readable), transaction count- Address lookup (0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe): - ETH balance - USDC balance (if call succeeded) - Transaction count (nonce)- Recent transactions: 3 examples with from / to / value in ETH / status

Frequently asked questions

Blockchain Web3