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Agent Chain Kit – Native Balance
x402
Agent Chain Kit – Native Balance is a paid API for AI agents from built-with-productos-voo8.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Returns the native token balance (in wei and human-readable units) for an EVM wallet address on Ethereum, Base, Arbitrum, or Polygon.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call EVM utility API for AI agents and automation.
Output
Returns a JSON object with the queried wallet address, the resolved network name, the raw balance in wei as a string, and the human-readable native token balance as a decimal number.
Example use cases
Gas budget check before transaction
“Before sending that transaction, check the native ETH balance on Arbitrum for wallet 0x1234567890abcdef1234567890abcdef12345678 and tell me if there's enough to cover gas.”
Agent wallet health monitor
“Periodically check the native balance on Base for our agent's wallet at 0xDeAdBeEf0000000000000000000000000000dEaD and alert me if it drops below a useful threshold.”
Portfolio native-token snapshot
“Look up the native MATIC balance on Polygon for address 0xAaBbCcDd1122334455667788990011aabbccddee and give me both the wei value and the human-readable amount.”
Technical details
Endpoint
GEThttps://built-with-productos-voo8.vercel.app/v1/native-balanceWhen to prefer
Choose this endpoint when you need a quick, pay-per-call native token balance lookup across major EVM networks (Ethereum, Base, Arbitrum, Polygon) without maintaining your own RPC infrastructure. It is ideal for AI agents or automation pipelines that need on-demand balance data at low per-call cost, especially when multi-RPC failover reliability matters.
Side effects
- Invalid address format (not a valid 0x hex address) returns a validation error
- Unsupported network value outside the allowed enum returns a 400-level error
- RPC provider outage may cause delays or 5xx errors (multi-RPC failover mitigates this)
- Payment not completed or insufficient USDC causes 402 Payment Required response
- Missing required `address` query parameter returns a 400 error
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
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