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EVM Native Balance Lookup
x402
EVM Native Balance Lookup is a paid API for AI agents from agent-chain-kit-solana.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-10).
Returns the native token balance (in wei and human-readable units) for a given EVM wallet address on Ethereum, Base, Arbitrum, or Polygon.
Price / call$0.001
Success—
StatusUnknown
How this service works
Global current weather, hourly forecasts, foreign-exchange rates, EVM reads, and deterministic utilities for AI agents. Pay per call with MPP or x402; no API key.
Output
Returns a JSON object containing the queried wallet address, the network it was queried on, the balance in wei (as a string), and the human-readable native token balance (e.g. ETH, MATIC). Returns zero balances for unfunded or non-existent addresses.
Example use cases
DeFi portfolio balance checker
“Can you check the native ETH balance for wallet 0xAbCd1234abcd1234abcd1234abcd1234abcd1234 on Ethereum mainnet?”
Airdrop eligibility pre-check
“Before we process this airdrop, can you verify whether 0x1111111111111111111111111111111111111111 has any native balance on Polygon — even a small amount?”
Agent wallet funding monitor
“Check if our agent wallet 0xDeAdBeEf00000000000000000000000000000000 still has native token funds on Arbitrum so I know if it needs topping up.”
Technical details
Endpoint
GEThttps://agent-chain-kit-solana.vercel.app/v1/native-balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, keyless, pay-per-call read of a native token balance on Ethereum, Base, Arbitrum, or Polygon. It is ideal for AI agents that need on-chain balance data without managing API keys or subscriptions, and supports micropayment via x402/MPP. Prefer alternatives if you need ERC-20 token balances, historical balance data, or support for non-EVM chains like Solana.
Side effects
- Invalid address format (not a 0x-prefixed 40-hex-char address) — schema validation error
- Unsupported network name — enum constraint rejection
- Network RPC unavailability — upstream read failure with error response
- Payment not provided or insufficient — 402 payment required response
- Zero balance returned for valid but unfunded address — not an error, just a zero result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"address": "0x0000000000000000000000000000000000000000",
"network": "base",
"balance_wei": "0",
"balance_native": "0"
}
}Tags
x402
Reviews
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How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
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