| name | web3-data |
| description | Explore Web3 on-chain data using Chainbase APIs. Use this skill when the user asks about blockchain data, token holders, wallet addresses, token prices, NFTs, ENS domains, transactions, DeFi portfolios, or any on-chain analytics. Triggers include: "top holders of", "who holds", "wallet address", "address labels", "token price", "token transfers", "NFT owners", "ENS domain", "on-chain data", "blockchain query", "SQL query on-chain", or any request to look up, analyze, or explore Web3/blockchain data across Ethereum, BSC, Polygon, Arbitrum, Optimism, Base, Avalanche, zkSync, and other EVM chains.
|
Web3 Data Explorer (Chainbase)
Query on-chain data via Chainbase Web3 API and SQL API.
Quick Reference
API Key: Use env CHAINBASE_API_KEY, falls back to demo. If rate-limited, direct user to https://console.chainbase.com to upgrade.
Script: scripts/chainbase.sh <endpoint> [params...]
scripts/chainbase.sh /v1/token/top-holders chain_id=1 contract_address=0xdAC17F958D2ee523a2206206994597C13D831ec7 limit=10
scripts/chainbase.sh /v1/address/labels chain_id=1 address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045
scripts/chainbase.sh /query/execute --sql="SELECT * FROM ethereum.blocks ORDER BY number DESC LIMIT 5"
Chain IDs
| Chain | ID | Chain | ID |
|---|
| Ethereum | 1 | Optimism | 10 |
| BSC | 56 | Base | 8453 |
| Polygon | 137 | zkSync | 324 |
| Avalanche | 43114 | Merlin | 4200 |
| Arbitrum | 42161 | | |
Default to Ethereum (chain_id=1) unless user specifies otherwise.
Routing Logic
Match user intent to the right endpoint:
| User wants | Endpoint |
|---|
| Top token holders / who holds a token | GET /v1/token/top-holders |
| List of holder addresses | GET /v1/token/holders |
| Token price | GET /v1/token/price |
| Historical token price | GET /v1/token/price/history |
| Token info (name, symbol, supply) | GET /v1/token/metadata |
| Token transfer history | GET /v1/token/transfers |
| Address labels/tags | GET /v1/address/labels |
| Wallet transaction history | GET /v1/account/txs |
| Single transaction detail | GET /v1/tx/detail |
| Native token balance (ETH/BNB) | GET /v1/account/balance |
| ERC20 token balances of wallet | GET /v1/account/tokens |
| NFTs owned by wallet | GET /v1/account/nfts |
| DeFi portfolio positions | GET /v1/account/portfolios |
| ENS domain lookup | GET /v1/ens/records or /v1/ens/reverse |
| NFT metadata/owner/rarity | GET /v1/nft/metadata, /owner, /rarity |
| Trending NFT collections | GET /v1/nft/collection/trending |
| Anything not covered above | SQL API (POST /query/execute) |
Workflow
- Identify intent — Determine what data the user needs
- Resolve identifiers — If user gives token name (e.g. "USDT"), look up the contract address. Common tokens:
- USDT:
0xdAC17F958D2ee523a2206206994597C13D831ec7 (ETH)
- USDC:
0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 (ETH)
- WETH:
0xC02aaA39b223FE8D0A0e5c4F27eAD9083C756Cc2 (ETH)
- DAI:
0x6B175474E89094C44Da98b954EedeAC495271d0F (ETH)
- WBTC:
0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599 (ETH)
- If unknown, use
GET /v1/token/metadata or ask the user for the contract address
- Select endpoint — Use the routing table above; fall back to SQL API for complex/custom queries
- Execute — Run via
scripts/chainbase.sh or direct curl
- Present results — Format data clearly with tables for lists, highlight key insights
SQL API Fallback
When fixed endpoints don't cover the query, translate user intent to SQL:
scripts/chainbase.sh /query/execute --sql="SELECT from_address, SUM(value) as total FROM ethereum.token_transfers WHERE contract_address = '0x...' GROUP BY from_address ORDER BY total DESC LIMIT 20"
Common table patterns (replace ethereum with chain name):
{chain}.blocks — Block data{chain}.transactions — Transactions{chain}.token_transfers — ERC20 transfers{chain}.token_metas — Token metadata{chain}.logs — Event logs
SQL constraints: max 100,000 results per query.
For complete endpoint parameters and response schemas, read references/api-endpoints.md.
