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Aether ERC-20 Balance Lookup on Base
x402
Aether ERC-20 Balance Lookup on Base is a paid API for AI agents from aether-x402.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).
Returns the ERC-20 token balance for a given wallet address on the Base network, including raw amount, symbol, decimals, and human-readable formatted value.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call Base onchain data, token risk verdicts and x402 payability audits over x402 (USDC on Base).
Output
A JSON object containing the raw balance string (e.g. '1500000'), the token symbol (e.g. 'USDC'), the number of decimals (e.g. 6), and the human-readable formatted balance (e.g. '1.5'). Paid via x402 protocol at $0.002 USDC per call.
Example use cases
Pre-trade balance check for DeFi bot
“Before the swap executes, check how much USDC wallet 0x1234...abcd actually holds on Base using token contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I need the formatted balance to confirm there are enough funds.”
Portfolio tracker wallet audit
“I'm auditing a wallet — can you look up the WETH balance on Base for address 0xDead...Beef using token contract 0x4200000000000000000000000000000000000006 and tell me the raw and formatted amounts?”
Verify token receipt after transfer
“Did the transfer go through? Check whether address 0xCafe...1234 now has any DAI on Base using token contract 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb and show me the current balance.”
Technical details
Endpoint
POSThttps://aether-x402.vercel.app/v1/base/erc20-balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call ERC-20 balance lookup specifically on the Base network without managing your own RPC infrastructure. Ideal for AI agents that need to verify token holdings before executing transactions, auditing wallets, or enriching onchain data pipelines. The x402 micropayment model means no API key setup — just pay $0.002 USDC per call.
Side effects
- Invalid token contract address (not a valid 0x ERC-20 address) returns an error
- Invalid wallet address format returns validation error
- Token contract does not exist on Base returns zero balance or error
- Network congestion or RPC failure may cause timeouts
- Payment failure via x402 (insufficient USDC) blocks the call
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | |
| address | string |
Output
Schema · Response
{
"type": "json",
"example": {
"raw": "1500000",
"symbol": "USDC",
"decimals": 6,
"formatted": "1.5"
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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