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Base Reads – USDC Balance Lookup
x402
Base Reads – USDC Balance Lookup is a paid API for AI agents from base-reads-api.rafliyaputra.deno.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-01).
Returns the USDC (and ETH) balance of a given Base network address at the latest block, for $0.001 USDC per call via x402.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call read API for Base over x402 v2. Deterministic data, no advice.
Output
A JSON object containing the wallet's USDC balance in human-readable form and raw units (usdc and usdc_raw), ETH balance in ETH and wei (eth and eth_wei), the block number at which the read was taken (block), the chain name (base), and the queried address. Example: {eth: 0.25, usdc: 12.5, block: 36000000, chain: 'base', address: '0x...', eth_wei: '250000000000000000', usdc_raw: '12500000'}.
Example use cases
Pre-payment balance check
“Before I send that USDC transfer on Base, can you check if 0xAbCd1234...5678 actually has at least 50 USDC available right now?”
Portfolio balance snapshot
“Can you look up the current ETH and USDC balances on Base for my wallet 0x4200000000000000000000000000000000000016 so I know what I'm working with?”
Automated DeFi bot verification
“My trading bot needs to confirm that address 0xDeAdBeEf00000000000000000000000000001234 has a non-zero USDC balance on Base before it executes the next step — can you pull that right now?”
Technical details
Endpoint
GEThttps://base-reads-api.rafliyaputra.deno.net/base/usdc-balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a cheap ($0.001 USDC), deterministic, pay-per-call read of a wallet's USDC balance on the Base L2 network without setting up your own RPC node or indexer. Ideal for agents that need occasional on-demand balance checks rather than continuous streaming. Prefer over general Ethereum RPC providers when you specifically need Base network data with x402 micropayment billing.
Side effects
- Invalid address format (not matching ^0x[0-9a-fA-F]{40}$) returns a validation error
- Missing address query parameter returns a 400-level error
- Payment not provided or invalid x402 payment header returns 402 Payment Required
- RPC/node unavailability may cause transient 5xx errors
- Rate limiting if payment processing fails on the facilitator side
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"eth": 0.25,
"usdc": 12.5,
"block": 36000000,
"chain": "base",
"address": "0x4200000000000000000000000000000000000016",
"eth_wei": "250000000000000000",
"usdc_raw": "12500000"
}
}Tags
x402
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