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EVM Chain Read – Native Balance Lookup (x402)
x402
EVM Chain Read – Native Balance Lookup (x402) is a paid API for AI agents from chain-read.frcompanycheck.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Returns the native token balance (e.g. ETH) for a given address on Base (chain 8453) or Robinhood Chain (4663), paid per-call via x402 USDC micropayment.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call EVM reads on Base (8453) and Robinhood Chain (4663): native balance, block tip, ERC-20 meta/balance/allowance, is-contract. Public RPCs, no API key. x402 USDC on Base.
Output
Returns a JSON object with the native token symbol (e.g. 'ETH'), the current balance as a decimal number, and the chain ID confirming which network was queried.
Example use cases
Monitor wallet balance on Base
“Check how much ETH is currently in wallet 0xDEADBEEF...on Base — I want to know if there's enough to cover gas fees.”
Verify funded address before transfer
“Before I send funds, can you confirm that wallet 0x1234...5678 has a positive native token balance on Base (chain 8453)?”
Audit treasury wallet on Robinhood Chain
“Look up the native balance of our treasury address 0xABCD...EF01 on Robinhood Chain (chain ID 4663) and tell me the symbol and amount.”
Technical details
Endpoint
GEThttps://chain-read.frcompanycheck.workers.dev/v1/%7Bchain%7D/balance/%7Baddress%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call native balance check on Base or Robinhood Chain without setting up your own RPC credentials or API key. It is ideal for lightweight agents that make infrequent balance queries and want to pay only for what they use via x402 USDC micropayments on Base.
Side effects
- Invalid or malformed address returns an error response
- Unsupported chain ID (anything other than 8453 or 4663) results in a 400 or unrecognized-chain error
- Insufficient x402 USDC payment causes a 402 Payment Required response
- RPC node temporarily unavailable may cause a 503 or timeout
- Address with zero balance returns balance: 0 rather than an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"symbol": "ETH",
"balance": 0.01,
"chain_id": 8453
}
}Tags
x402
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