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x-402 USDC Address Transfer Lookup
x402
x-402 USDC Address Transfer Lookup is a paid API for AI agents from api.x-402.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).
Returns USDC ERC-20 transfer history (incoming and outgoing) for a Base address, with x402 payment settlements identified by EIP-3009 method, plus totals and sender stats.
Price / call$0.005
Success—
StatusUnknown
How this service works
See the USDC an address received and sent on Base, with x402 settlements identified. ERC-20 transfers of an address on Base, incoming and outgoing, with the x402 settlements identified by their EIP-3009 method. Totals, distinct senders, last settlement time. Default token is USDC. Data from Blockscout, first page, truncation declared. Query: ?address=&token=
Output
A structured response containing paginated ERC-20 transfer records (first page) for the queried address on Base, with each transfer labeled as incoming or outgoing and x402 settlements flagged by their EIP-3009 method. Also includes aggregate totals for amount received and sent, count of distinct senders, and timestamp of the last x402 settlement. Truncation is declared when results exceed one page.
Example use cases
Audit x402 revenue for a merchant
“Pull up all USDC received by 0xDEF...456 on Base and tell me which transfers are x402 settlements, how much total came in, and when the last payment was.”
Verify payment from a specific wallet
“Check whether the Base address 0x111...AAA has sent any USDC to 0x222...BBB recently — I want to see the full transfer history and any x402 payments identified.”
Monitor wallet activity for a developer
“Give me the USDC transfer summary for Base address 0x999...ZZZ — I need the total sent and received, the number of distinct senders, and any x402 protocol settlements flagged.”
Technical details
Endpoint
GEThttps://api.x-402.online/v1/chain/address?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, structured summary of USDC (or other ERC-20) activity for a specific Base address, especially when you want x402 payment settlements automatically identified without building your own Blockscout query and EIP-3009 filter logic. It is ideal for merchant revenue audits, payment verification, and agent-driven accounting workflows on the Base chain. Prefer alternatives if you need multi-page history, multi-chain data, or non-ERC-20 native ETH transfers.
Side effects
- Invalid or malformed Base address returns an error or empty results
- Unsupported token address causes fallback to USDC or error
- Only first page of transfers returned — historical data may be truncated without pagination support
- Blockscout data lag may mean very recent transfers are missing
- Address with no transfer history returns zeroed totals
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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