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EVM Wallet Native Balance Lookup
x402
EVM Wallet Native Balance Lookup is a paid API for AI agents from chain.cyberwarex.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-03).
Returns the native token balance (ETH, MATIC, etc.) of any EVM wallet address in wei, decimal, symbol, and USD value on a specified chain
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call EVM chain data for agents: wallet snapshots, ERC-20 token profiles, spot prices, gas markets, transaction decode, and ENS resolution across major EVM chains (base, ethereum, arbitrum, optimism, polygon). Deterministic JSON, no RPC keys or node infra needed.
Output
Returns a JSON object containing the wallet address queried, the chain, the native token symbol (e.g. ETH, MATIC), the balance as a decimal number, the balance in wei as a string, and the current USD value of that balance (null if price feed is unavailable).
Example use cases
Portfolio balance snapshot
“Can you tell me how much ETH is sitting in wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum right now, and what that's worth in dollars?”
DeFi agent treasury check
“Check the native token balance of our treasury address 0xAbCd1234567890abcdef1234567890abcdef1234 on Arbitrum — give me the amount in ETH and its current USD value.”
Polygon wallet funding verification
“I need to verify whether address 0x1234567890abcdef1234567890abcdef12345678 on Polygon has any MATIC balance before I trigger a transaction — can you look that up?”
Technical details
Endpoint
GEThttps://chain.cyberwarex.com/balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, keyless native token balance check for any EVM-compatible address across Base, Ethereum, Arbitrum, Optimism, or Polygon without managing RPC infrastructure. Ideal for agents that need deterministic JSON wallet snapshots with USD pricing included in a single call. Prefer over raw RPC calls when you lack node access or want normalized output with live USD conversion baked in.
Side effects
- Invalid address format (not matching 0x + 40 hex chars) returns a validation error
- Unsupported chain name returns an enum validation error
- Price feed outage causes usd field to return null while balance data remains valid
- Address with zero balance returns balance: 0 and usd: 0 rather than an error
- Network timeout or upstream RPC failure may return 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"usd": 4102.77,
"wei": "1284471203441290000",
"chain": "base",
"symbol": "ETH",
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"balance": 1.284471203
}
}Tags
x402
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