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Base USDC Transfer History Lookup
x402
Base USDC Transfer History Lookup is a paid API for AI agents from apiacre.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Retrieves newest-first incoming and outgoing Circle USDC ERC-20 Transfer events for a given Ethereum address over a bounded block range on Base mainnet.
Price / call$0.005
Success—
StatusUnknown
How this service works
Retrieve newest-first incoming and outgoing Circle USDC Transfer events for one address across a validated, bounded Base mainnet block range.
Output
A JSON object containing: asset metadata (USDC name, symbol, contract, decimals), the queried address, network (eip155:8453), transfer direction, a list of transfer events each with to/from addresses, amounts in human-readable USDC and atomic units, block number, transaction hash, log index, and a Basescan explorer URL. Also includes block range details (fromBlock, toBlock, timestamps, scanned block count), truncation flag, warnings, RPC call count, and disclaimer/limitation notices.
Example use cases
Verify incoming USDC payment
“Check if address 0x1A2B3C4D5E6F7890abcdef1234567890abcdef12 received any USDC on Base in the last 2000 blocks — I'm waiting on a payment and want to confirm it arrived.”
Audit wallet USDC outflows
“Show me all outgoing USDC transfers from 0xDeadBeef1111111111111111111111111111Dead on Base mainnet over the past 2000 blocks so I can reconcile our treasury movements.”
Monitor agent payment receipts
“Fetch the USDC transfer history for my Base address 0x9999888877776666555544443333222211110000 — I need to see what payments came in recently so I can trigger fulfillment for each one.”
Technical details
Endpoint
POSThttps://apiacre.com/v1/crypto/base-usdc-transfersWhen to prefer
Choose this endpoint when you need verified, on-chain USDC transfer event history specifically on Base mainnet for a single address, bounded to a recent block range. It is ideal for payment verification, treasury reconciliation, or agent-payment confirmation workflows where Circle's native USDC contract is the only asset of interest. Prefer this over general block explorers when you need structured, machine-readable JSON output with direction filtering and atomic/human amounts in one call. Not suitable for complete historical account sweeps, other EVM chains, or non-USDC tokens.
Side effects
- Invalid or malformed Ethereum address returns a validation error
- Block range exceeds the bounded maximum (2000 blocks) returns an error
- Unsupported block tag or out-of-range block number returns an error
- Public Base RPC unavailability causes a timeout or upstream error
- Address with no USDC transfers in range returns an empty transfers array
- Non-Base mainnet addresses or wrong chain return no results or an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | |
| address | string | |
| block_tag | string | |
| direction | string | |
| lookback_blocks | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"asset": {
"name": "USD Coin",
"symbol": "USDC",
"contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6
},
"source": "https://docs.base.org/base-chain/api-reference/ethereum-j...",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4...",
"address": "0x1111111111111111111111111111111111111111",
"network": "eip155:8453",
"detected": 1,
"readOnly": true,
"returned": 1,
"warnings": [],
"direction": "any",
"transfers": [
{
"blockHash": "0x2222222222222222222222222222222222222222222222222222222...",
"blockNumber": 34567800,
"transactionHash": "0x3333333333333333333333333333333333333333333333333333333...",
"transactionIndex": 4
}
],
"truncated": false,
"blockRange": {
"toBlock": 34567890,
"fromBlock": 34565891,
"toBlockHash": "0x1111111111111111111111111111111111111111111111111111111...",
"requestedTag": "safe"
},
"disclaimer": "Public onchain event evidence only. A transfer does not e...",
"usdcSource": "https://developers.circle.com/stablecoins/usdc-contract-a...",
"limitations": [
"Only Circle's official native USDC contract on Base mainn...",
"The result covers only the resolved bounded block range, ...",
"Finality and provider freshness depend on the requested b..."
],
"tokenSource": "https://eips.ethereum.org/EIPS/eip-20",
"rpcCallsMade": 3,
"eventSignature": "Transfer(address,address,uint256)",
"removedSkipped": 0,
"queriedLogCount": 1,
"duplicatesRemoved": 0,
"addressExplorerUrl": "https://basescan.org/address/0x11111111111111111111111111...",
"networkRequestsMade": 2,
"transactionBroadcast": false
},
"meta": {
"cached": false,
"sources": [],
"warnings": [],
"duration_ms": 42,
"next_actions": []
},
"service": "crypto.base-usdc-transfers",
"version": "1",
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"
}
}Tags
x402
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