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meld402 Chain Explorer — Ethereum Address Lookup
x402
meld402 Chain Explorer — Ethereum Address Lookup is a paid API for AI agents from meld402.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Fetches on-chain data for an Ethereum address including ETH balance, recent transactions, ERC-20 token transfers, and optional contract ABI via a single USDC micropayment.
Price / call$0.05
Success—
StatusUnknown
How this service works
14 paid data endpoints for autonomous agents and developers. Covers crypto intelligence (token, chain, Solana, gas), markets (FX, market pulse), location (weather), and research (news, brief). Each route aggregates multiple public sources into one stable schema with a single USDC payment over x402 on Base.
Output
Returns a JSON object with the queried Ethereum address, its ETH balance in both Wei and ETH, a flag indicating whether it is a contract, optionally the verified contract ABI, a list of recent transactions (with hash, from/to, value, gas, method ID, block number, timestamp), and a list of ERC-20 token transfers (with token name, symbol, contract address, value, decimals, and timestamp). Includes metadata about data sources and freshness.
Example use cases
DeFi wallet activity audit
“Look up everything on-chain for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — ETH balance, the last 100 transactions, and all ERC-20 transfers, so I can audit what this wallet has been doing.”
Smart contract ABI retrieval
“Is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 a verified smart contract? If so, grab its ABI along with current ETH balance and recent transactions.”
Whale wallet transaction monitoring
“Pull the recent on-chain activity for 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 — I want the last 25 transactions and any token transfers, no need for the ABI.”
Technical details
Endpoint
POSThttps://meld402.vercel.app/api/chain/explorerWhen to prefer
Choose this endpoint when you need a unified on-chain snapshot of an Ethereum address — balance, transactions, and token transfers — in a single call with a predictable schema and no API key management. It is ideal for autonomous agents that need to pay per-use via USDC micropayments on Base (x402 protocol) rather than maintaining API credentials. Prefer this over direct Etherscan API calls when you want aggregated, normalized output without handling raw Etherscan pagination or response formats.
Side effects
- Invalid Ethereum address format (must match 0x + 40 hex chars) returns validation error
- Address not found on-chain returns empty balances and empty transaction arrays
- tx_limit exceeding 100 is rejected
- Etherscan API degraded or rate-limited may return partial data with degraded sources noted in meta
- Payment failure over x402 results in 402 response before any data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | |
| tx_limit | integer | Max transactions to return |
| include_abi | boolean | Include contract ABI if verified |
| include_transactions | boolean | Include recent transactions |
| include_token_transfers | boolean | Include ERC-20 token transfers |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"eth_balance": "1500000000000000000",
"is_contract": true,
"contract_abi": "[{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]",
"eth_balance_eth": 1.5,
"token_transfers": [
{
"to": "0x1234...",
"from": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"hash": "0xabc123...",
"value": "1000000",
"decimals": "6",
"timestamp": "2026-08-23T12:00:00.000Z",
"token_name": "USD Coin",
"block_number": 19500000,
"token_symbol": "USDC",
"contract_address": "0xA0b86a33E6441b8c4C8C8C8C8C8C8C8C8C8C8C8C"
}
],
"recent_transactions": [
{
"to": "0xA0b86a33E6441b8c4C8C8C8C8C8C8C8C8C8C8C8C",
"from": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"hash": "0xabc123...",
"gas_used": "50000",
"method_id": "0xa9059cbb",
"timestamp": "2026-08-23T12:00:00.000Z",
"value_eth": 0,
"value_wei": "0",
"block_number": 19500000,
"gas_price_wei": "20000000000"
}
]
},
"meta": {
"as_of": "2026-08-24T00:00:00.000Z",
"sources": [
"etherscan"
],
"degraded": [],
"attribution": [
"Blockchain data by Etherscan (etherscan.io)"
]
}
}
}Tags
x402
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