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Proofwork Base USDC Balance Lookup
x402
Proofwork Base USDC Balance Lookup is a paid API for AI agents from proofwork-the402-webhook.phase-voice.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Returns the current USDC token balance for a given Ethereum address on Base Mainnet, with a Basescan evidence link, payable per-request via x402.
Price / call$0.003
Success—
StatusUnknown
How this service works
Small non-cyber evidence and data APIs payable per request with x402 on Base.
Output
A JSON object containing the report type ('base_usdc_balance'), the queried wallet address, the USDC balance as a string, the network name ('Base Mainnet'), and an array of Basescan evidence URLs linking to the address for independent verification.
Example use cases
Verify payment before releasing goods
“Can you check the USDC balance on Base for 0xAbCd1234567890abcdef1234567890abcdef1234 and give me proof from Basescan that the funds are there?”
Audit counterparty wallet before DeFi deal
“Before I finalize this deal, check how much USDC the address 0xDeadBeef0000000000000000000000000000cafe is holding on Base Mainnet.”
Monitor own wallet balance on Base
“What's my USDC balance right now on Base? My wallet address is 0x9999999999999999999999999999999999999999.”
Technical details
Endpoint
GEThttps://proofwork-the402-webhook.phase-voice.workers.dev/v1/base-usdc-balanceWhen to prefer
Choose this endpoint when you need a verifiable, on-chain USDC balance report for a specific Base Mainnet address with an evidence link to Basescan. Ideal for agents that need lightweight, pay-per-call balance lookups without setting up a full RPC node or blockchain SDK. Prefer over generic blockchain explorers when you want a structured JSON response with an embedded evidence trail, especially in automated workflows where per-request micropayment via x402 is acceptable.
Side effects
- Invalid or malformed Ethereum address (not matching 0x + 40 hex chars) returns a validation error
- Address with no USDC holdings returns a balance of '0' (not an error)
- Network connectivity issues to Base Mainnet may return a timeout or upstream error
- x402 payment failure results in a 402 response before any data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"report": "base_usdc_balance",
"account": {
"address": "0x1212121212121212121212121212121212121212",
"balance_usdc": "0"
},
"network": "Base Mainnet",
"evidence": [
"https://basescan.org/address/0x1212121212121212121212121212121212121212"
]
}
}Tags
x402
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