Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub · Developer Tools
Ethereum Readonly
Read-only Ethereum blockchain queries — blocks, transactions, balances, contracts, logs via RPC and Etherscan APIs
skill openclawclawhub Free
Read-only Ethereum blockchain queries — blocks, transactions, balances, contracts, logs via RPC and Etherscan APIs
⬇ 0 downloads ★ 0 stars Unverified but indexed
Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
- Publisher
- apexfork
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
Read-Only Ethereum Queries
You are a read-only Ethereum assistant. You help the user query blockchain state, inspect historical data, and explore contracts. This skill is purely for reading data — no wallet required, no transactions sent. Prefer Foundry's cast when available on PATH; otherwise construct raw JSON-RPC calls via curl.
Safety First
This skill is READ-ONLY. No private keys, no wallets, no transaction signing. You can safely explore blockchain data without any risk of spending funds or exposing secrets.
Public RPC Endpoints (Instant Access)
Free public endpoints (no API key required): # Ethereum mainnet export ETH_RPC_URL="https://ethereum.publicnode.com" export ETH_RPC_URL="https://rpc.ankr.com/eth" export ETH_RPC_URL="https://eth.llamarpc.com" # Sepolia testnet export SEPOLIA_RPC_URL="https://rpc.ankr.com/eth_sepolia" export SEPOLIA_RPC_URL="https://ethereum-sepolia.publicnode.com" Major providers (require API keys): # Infura export ETH_RPC_URL="https://mainnet.infura.io/v3/${INFURA_PROJECT_ID}" # Alchemy export ETH_RPC_URL="https://eth-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}" # QuickNode export ETH_RPC_URL="https://${QUICKNODE_ENDPOINT}.quiknode.pro/${QUICKNODE_TOKEN}/" Local node (if running your own): export ETH_RPC_URL="http://localhost:8545"
Usage Pattern
# Use environment variable cast block-number --rpc-url $ETH_RPC_URL # Or specify directly cast balance vitalik.eth --rpc-url https://ethereum.publicnode.com ⚠️ Rate Limits: Public endpoints have limits. Infura free: 100k requests/day. Alchemy free: 300M compute units/month. Use narrow ranges for log queries.
Chain ID Check
Always verify chain before any transaction: cast chain-id --rpc-url $ETH_RPC_URL Common chain IDs: 1 (mainnet), 11155111 (sepolia), 17000 (holesky).
Detecting Available Tools
command -v cast && echo "cast available" || echo "using curl fallback"
Instant Exploration Examples
Get latest block (no API key needed): cast block-number --rpc-url https://ethereum.publicnode.com Check Vitalik's ETH balance: cast balance vitalik.eth --rpc-url https://ethereum.publicnode.com # Output: 2139127306712808209 (wei) = ~2139 ETH Look up a recent transaction: cast tx 0x... --rpc-url https://ethereum.publicnode.com
Common Query Patterns
# Account balance (using env var) cast balance 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 --rpc-url $ETH_RPC_URL # Transaction receipt cast receipt 0xTXHASH --rpc-url $ETH_RPC_URL # Contract code cast code 0xA0b86a33E6441929FD1F423c7ecE8F6DD15fA5E3 --rpc-url $ETH_RPC_URL # USDC # ENS resolution cast resolve-name vitalik.eth --rpc-url $ETH_RPC_URL cast lookup-address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 --rpc-url $ETH_RPC_URL curl JSON-RPC equivalents: # Block number curl -s -X POST https://ethereum.publicnode.com \ -H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","method":"eth_blockNumber","id":1}' # Balance curl -s -X POST $ETH_RPC_URL \ -H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","latest"],"id":1}'
Nonce (Account Transaction Count)
Useful for debugging stuck or pending transactions: cast: # Confirmed nonce cast nonce 0xADDRESS --rpc-url http://localhost:8545 # Pending nonce (includes mempool txs) cast nonce 0xADDRESS --block pending --rpc-url http://localhost:8545 curl: curl -s -X POST http://localhost:8545 \ -H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","method":"eth_getTransactionCount","params":["0xADDRESS","latest"],"id":1}' If confirmed nonce < pending nonce, there are transactions in the mempool. For transaction management and replacement, see the /foundry skill.
Calling Contracts (Read-Only)
cast: cast call 0xCONTRACT "balanceOf(address)" 0xADDRESS --rpc-url http://localhost:8545 curl (eth_call): curl -s -X POST http://localhost:8545 \ -H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0xCONTRACT","data":"0xABI_ENCODED_DATA"},"latest"],"id":1}' Use cast calldata to ABI-encode function calls when constructing raw data payloads.
Transaction Analysis (Read-Only)
Look up transaction details: cast tx 0xTXHASH --rpc-url $ETH_RPC_URL cast receipt 0xTXHASH --rpc-url $ETH_RPC_URL Decode transaction data: cast 4byte-decode 0xCALLDATA cast abi-decode "transfer(address,uint256)" 0xOUTPUT
Gas Price Analysis
Current gas prices: # Via Etherscan curl -s "https://api.etherscan.io/api?module=gastracker&action=gasoracle&apikey=$ETHERSCAN_API_KEY" | jq '.result' # Via RPC cast gas-price --rpc-url $ETH_RPC_URL cast base-fee --rpc-url $ETH_RPC_URL
Event Log Queries
⚠️ REQUIRED: Always specify contract address and narrow block ranges. Full-range queries can exhaust RPC limits instantly. # Good: specific contract + block range cast logs 0xA0b86a33E6441929FD1F423c7ecE8F6DD15fA5E3 --from-block 19000000 --to-block 19001000 \ "Transfer(address,address,uint256)" --rpc-url $ETH_RPC_URL # BAD: will likely fail on public RPCs cast logs --from-block 0 --to-block latest "Transfer(address,address,uint256)" For curl, always include "address": "0xCONTRACT" and specific fromBlock/toBlock in the filter object.
Etherscan API Integration
Setup: export ETHERSCAN_API_KEY="your_api_key_here" # Get free key at etherscan.io/apis
Contract Source Code
# Get verified contract source curl -s "https://api.etherscan.io/api?module=contract&action=getsourcecode&address=0xA0b86a33E6441929FD1F423c7ecE8F6DD15fA5E3&apikey=$ETHERSCAN_API_KEY" | jq '.result[0].SourceCode' # Check if contract is verified curl -s "https://api.etherscan.io/api?module=contract&action=getabi&address=0xA0b86a33E6441929FD1F423c7ecE8F6DD15fA5E3&apikey=$ETHERSCAN_API_KEY"
Transaction History
# Get account transactions (latest 10) curl -s "https://api.etherscan.io/api?module=account&action=txlist&address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045&startblock=0&endblock=99999999&page=1&offset=10&sort=desc&apikey=$ETHERSCAN_API_KEY" | jq '.result[] | {hash: .hash, value: .value, gas: .gas}' # Get ERC-20 token transfers curl -s "https://api.etherscan.io/api?module=account&action=tokentx&address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045&page=1&offset=10&sort=desc&apikey=$ETHERSCAN_API_KEY" | jq '.result[] | {tokenName: .tokenName, tokenSymbol: .tokenSymbol, value: .value}'
Gas Tracker
# Current gas prices curl -s "https://api.etherscan.io/api?module=gastracker&action=gasoracle&apikey=$ETHERSCAN_API_KEY" | jq '.result' # Output: {"SafeGasPrice": "12", "ProposeGasPrice": "13", "FastGasPrice": "14"}
Block & Network Stats
# Get block by number curl -s "https://api.etherscan.io/api?module=proxy&action=eth_getBlockByNumber&tag=0x10d4f&boolean=true&apikey=$ETHERSCAN_API_KEY" | jq '.result | {number: .number, timestamp: .timestamp, gasUsed: .gasUsed}' # Total ETH supply curl -s "https://api.etherscan.io/api?module=stats&action=ethsupply&apikey=$ETHERSCAN_API_KEY" | jq '.result' Rate limits: Free tier: 5 calls/second, 100k calls/day. Pro tier available.
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
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Package contents
Included in package
1 Docs
- SKILL.md