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Receipt Lens Base USDC Evidence
x402
Receipt Lens Base USDC Evidence is a paid API for AI agents from receipt-lens-8af7.beatrise-jansevska.chatgpt.site, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-16).
Verifies a Base blockchain USDC transaction against an expected recipient and amount, returning a signed evidence report
Price / call$0.05
Success—
StatusUnknown
How this service works
Check one Base USDC receipt against an expected recipient and amount. Pay per report with x402.
Output
Returns a JSON object with: payment status (e.g. 'expected_payment_observed'), chain ID, block number and hash, confirmation count, observed vs expected amounts in micro-USDC, all USDC Transfer log entries in the transaction, gas fees (execution and L1), a SHA-256 evidence hash for the report, and an array of limitations explaining what the verification does and does not prove.
Example use cases
Confirm payment before releasing digital goods
“Before I unlock the download, check if Base tx 0xfe0c6ac687c1741f617e58021aa6efc3b584aaae8536fef75a6de2f897d11ce1 actually delivered exactly 1000000 micro-USDC to my wallet 0xf200174de10c26ce7670aaf41d69a8979fe5629d.”
Audit a vendor's USDC invoice payment
“I need to verify that our vendor got paid — can you pull the evidence report for Base transaction 0xabc123...def and confirm exactly 5000000 micro-USDC reached 0xf200174de10c26ce7670aaf41d69a8979fe5629d?”
Automated agent payment self-verification
“My agent just made a USDC payment on Base with tx hash 0x1234...abcd — verify it went to 0xf200174de10c26ce7670aaf41d69a8979fe5629d for 50000 micro-USDC and give me the evidence hash so I can log it.”
Technical details
Endpoint
GEThttps://receipt-lens-8af7.beatrise-jansevska.chatgpt.site/v1/usdc-receipt?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a structured, auditable evidence report for a specific Base chain USDC payment — particularly for pay-per-use or x402-gated workflows where you need cryptographic confirmation (SHA-256 evidence hash) that a transfer reached the correct recipient for the correct amount. Prefer it over generic block explorers when you need machine-readable output with explicit status flags and limitations. Not suitable for ETH transfers, non-Base chains, or ERC-20 tokens other than native USDC on Base.
Side effects
- Transaction hash not found on Base mainnet — returns error or status other than 'expected_payment_observed'
- Recipient address mismatch — transfer logs don't include the expected recipient
- Amount mismatch — observed amount to recipient differs from expected
- Transaction failed on-chain — failed transactions are never labeled completed payments
- RPC unavailability — single public RPC dependency may time out or return stale data
- Invalid input format — tx hash, recipient, or amount not matching required regex patterns returns a validation error
- Payment from ERC-20 token other than native USDC on Base — not counted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"fees": {
"gasUsed": "92324",
"l1FeeWei": "3230288131",
"executionFeeWei": "646268000000",
"effectiveGasPriceWei": "7000000"
},
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"source": "https://mainnet.base.org",
"status": "expected_payment_observed",
"chainId": "8453",
"decimals": 6,
"blockHash": "0xc3e07201702ef6d2446046eaf796b30c82499e121002b3ebced7ae7d0bb2e199",
"checkedAt": "2026-10-02T12:58:12.068Z",
"transfers": [
{
"to": "0xf200174de10c26ce7670aaf41d69a8979fe5629d",
"from": "0x6eb1e253886c70d238d931c4ad611723f3647dc3",
"logIndex": "902",
"amountMicroUSDC": "20000"
}
],
"blockNumber": "52056892",
"limitations": [
"One public RPC observation, not independent validator verification or a finality guarantee.",
"Native USDC Transfer logs on Base only; does not prove human identity, intent, invoices, organic demand or ownership.",
"Recipient amounts aggregate all matching native-USDC Transfer logs in this transaction; no other tokens or ETH counted.",
"Execution fee and reported L1 fee are separate; no inferred complete fee total.",
"Failed transactions are never labeled completed payments."
],
"transactionHash": "0xfe0c6ac687c1741f617e58021aa6efc3b584aaae8536fef75a6de2f897d11ce1",
"expectedRecipient": "0xf200174de10c26ce7670aaf41d69a8979fe5629d",
"observedHeadBlock": "52078272",
"evidenceHashSHA256": "87ad8a953bb589576d3adeeef06f0d04062cd2641fb1595d0a6d576a61058fc8",
"observedConfirmations": "21381",
"expectedAmountMicroUSDC": "20000",
"expectedPaymentObserved": true,
"observedAmountToRecipientMicroUSDC": "20000"
}
}Tags
x402
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