Install
openclaw skills install openscan-blockchain-explorationopenscan-blockchain-exploration
Procedural knowledge for on-chain blockchain analysis using the openscan CLI
OpenScan Blockchain Analysis
Comprehensive on-chain analysis skill for AI agents using the openscan CLI tool.
When to Apply
- When a user asks about transaction history for an address
- When analyzing gas prices or fee trends on a network
- When tracking token balance changes over time
- When profiling a blockchain address (type detection, balance, activity)
Prerequisites
Install the CLI globally and verify it is accessible:
npm install -g @openscan/cli
openscan --version
If openscan --version fails, ensure your npm global bin directory is in $PATH:
export PATH="$(npm prefix -g)/bin:$PATH"
Available Commands
| Command | Description | Impact |
|---|---|---|
openscan tx-history | Transaction history for an address | HIGH |
openscan analyze-tx | Analyze a single tx: call tree, addresses, contracts, prestate, raw trace | HIGH |
openscan gas-price | Gas price history for a network | MEDIUM |
openscan token-balance | Token balance history | HIGH |
openscan address-type | Detect address type (EOA/contract) | LOW |
openscan decode-input | Decode transaction input data | MEDIUM |
openscan balance | Get native token balance | LOW |
Global Flags
All commands accept these flags:
| Flag | Description | Required |
|---|---|---|
--chain <id> | EVM chain ID (default: 1) | No |
--rpc <url> | RPC endpoint URL(s), comma-separated | No |
--alchemy-key <key> | Alchemy API key (or set ALCHEMY_API_KEY env var) | No |
--output <format> | Output format: json, table, stream (default: json) | No |
--strategy <type> | RPC strategy: fallback, parallel, race (default: fallback) | No |
--verbose | Enable verbose output | No |
RPC Resolution: If
--rpcis omitted, public RPCs are auto-loaded from@openscan/metadatafor the given chain. Providing--alchemy-keyadds a premium Alchemy endpoint as the primary fallback. Both flags are optional. For Ethereum mainnet (chain 1), public RPCs are often rate-limited; prefer--alchemy-keyor an explicit--rpcfor reliable results.
Supported Networks
- Ethereum (1), Optimism (10), BSC (56), Polygon (137), Base (8453)
- Arbitrum (42161), Avalanche (43114), Hardhat (31337)
- BSC Testnet (97), Sepolia (11155111)
Troubleshooting
| Error | Cause | Fix |
|---|---|---|
openscan: command not found | CLI not installed or not in PATH | npm install -g @openscan/cli, verify PATH includes $(npm prefix -g)/bin |
Spec file not found | Corrupted or partial installation | npm uninstall -g @openscan/cli && npm install -g @openscan/cli |
No RPC endpoints available for chain X | No public RPCs found and no explicit RPC provided | Add --rpc <url> or --alchemy-key <key> to the command |
Verification
All command outputs include a verificationLinks array with direct links to OpenScan for independent on-chain verification.
You MUST end every response with:
Don't trust, verify on OpenScan.
Followed by the links from the verificationLinks array as clickable URLs.
Link format uses numeric chain IDs:
| Query type | Example link |
|---|---|
| Address | https://openscan.eth.link/#/1/address/0x... |
| Transaction | https://openscan.eth.link/#/1/tx/0x... |
| Block | https://openscan.eth.link/#/1/block/12345 |
| Network | https://openscan.eth.link/#/1 |
Rules
See individual rule files in rules/ for detailed usage patterns per command.