An EVM multi-chain blockchain data tool that enables AI agents to query balances, transactions, contract ABIs, and real-time gas prices.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install blockchain-scanner
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install blockchain-scanner using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Blockchain Scanner?
The Blockchain Scanner skill is a powerful multi-chain EVM data retrieval suite designed specifically for AI-driven on-chain workflows. Activated via Openclaw Skills, this remote tool allows agents to fetch native and ERC-20 token balances, audit paginated transaction logs, retrieve verified contract ABIs, and monitor live gas price recommendations across Ethereum, Base, Polygon, Arbitrum, and Optimism.
By leveraging this tool inside your autonomous environments through Openclaw Skills, developers can equip their agents with the real-time context needed to make informed financial decisions, analyze smart contract behavior, and track user wallets natively without maintaining heavy blockchain node infrastructure.
Blockchain Scanner Use Cases
- Crypto Balance & Account Management: Pull native balances and ERC-20 token holdings (like USDC, USDT, and WETH) for up to 20 addresses simultaneously.
- Blockchain Transaction History & Activity Tracking: Access paginated, structured transaction histories (100 per call) to map user or contract activity.
- Ethereum Gas Price & Fee Management: Utilize the gas oracle for precise EIP-1559 base fee and speed recommendations before committing transactions.
- Smart Contract Development: Inspect verified smart contracts on the fly by downloading complete ABI arrays, functions, and event parameters.
How Blockchain Scanner Works
- Installation: Developers set up the blockchain-scanner skill workspace using the Openclaw Skills command line interface or standard package managers.
- Payload Design: The AI agent structures a payload specifying the targeted EVM
chainandaction(e.g.,balance,token_balance,transactions,contract_abi, orgas_oracle). - Remote Dispatch: The request is executed securely via MCP or REST as an AgentPMT-hosted remote tool invocation.
- Data Retrieval: The scanner processes the request across the selected live mainnet or testnet network.
- Response Delivery: The tool returns a clean, structured JSON dataset indicating standard balances, Gwei fee bounds, or arrays of parsed transactions to guide downstream agent logic.
Blockchain Scanner Setup
To deploy and configure the blockchain-scanner tool, first ensure that the core AgentPMT authentication and helper skills are active in your environment using Openclaw Skills.
Install Helper Skills
Run the following commands in your terminal to initialize the required context:
# Initialize with Openclaw Skills
openclaw skills install what-is-agentpmt
openclaw skills install agentpmt-account-mcp-rest-api-setup
Alternatively, you can utilize the skills.sh installer:
npx skills add AgentPMT/agent-skills --skill what-is-agentpmt
npx skills add AgentPMT/agent-skills --skill agentpmt-account-mcp-rest-api-setup
MCP Tool Call Structure
Once connected, query native balances across chains using this standard MCP call configuration:
{
"method": "tools/call",
"params": {
"name": "Blockchain-Scanner",
"arguments": {
"action": "balance",
"address": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"chain": "ethereum"
}
}
}
Blockchain Scanner Data Schema & Taxonomy
The blockchain-scanner skill structures its functions around 5 core operational actions across 6 supported networks. Every transaction action carries a standardized execution credit pricing.
Available Chain Values
| Chain Parameter | Blockchain Network |
|---|---|
ethereum |
Ethereum Mainnet (default) |
base |
Base L2 |
base_sepolia |
Base Sepolia Testnet |
polygon |
Polygon PoS |
arbitrum |
Arbitrum One |
optimism |
Optimism Mainnet |
Input Parameter Specification
- Wallet / Contract Addresses: Must be strictly structured as 42-character, 0x-prefixed hexadecimal strings.
- Transaction Paging (
transaction_range): Must span exactly 100 entries (e.g.,[1, 100]or[101, 200]). - Token Balance Queries: Accepts major assets such as USDC, USDT, DAI, WETH, WBTC, and WMATIC depending on the chosen chain. Set
token: "all"to retrieve all supported assets concurrently.
Blockchain Scanner Advanced Features
- Multi-Wallet Batching: Query native balances and ERC-20 holding portfolios across up to 20 unique addresses in a single action.
- Precision EIP-1559 Oracle: Extract granular safe, standard, and fast gas limits along with target base fees in Gwei.
- Zero-Node Smart Contract Inspection: Analyze verified contract logic and interfaces without maintaining dedicated RPC nodes, pulling detailed JSON ABIs and function lists instantly.
- Paginated Ledger Auditing: Keep your agent's context window light by retrieving historical blockchain transaction ranges exactly 100 items at a time.
SKILL.md
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