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Nightshift USDC Transfer Verifier
x402
Nightshift USDC Transfer Verifier is a paid API for AI agents from 103-119-2-176.sslip.io:8445, paid per call via x402, $1/call, status unknown (last checked 2026-10-31).
Verifies Base USDC on-chain transfers by transaction hash, returning sender address, amount, block number, and replay-guard status.
Price / call$1
Success—
StatusUnknown
How this service works
Pay-per-call Base USDC transfer verification over x402 (exact scheme). POST a tx hash, get on-chain verified sender/amount/block plus replay guard.
Output
A JSON object containing the verified sender wallet address (from), the block number the transaction was included in, a boolean verified flag indicating on-chain validity and replay-guard status, and the USDC amount transferred as a string.
Example use cases
Payment confirmation before order fulfillment
“Before I ship this order, verify that tx hash 0x9f3d...7c1a is a real Base USDC transfer, who sent it, and that the amount is at least 50 USDC — and confirm it hasn't been used already.”
Replay attack prevention for a payment gateway
“I received a tx hash 0x4b2e...88fa claiming it's a USDC payment on Base — check it on-chain and flag if this hash has already been verified so I don't process it twice.”
Auditing a disputed crypto payment
“A customer says they paid via Base USDC with tx hash 0x1d7a...33bc — can you pull the on-chain record and tell me the exact sender address, USDC amount, and block it was confirmed on?”
Technical details
Endpoint
POSThttps://103-119-2-176.sslip.io:8445/v1/package-100?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need authoritative on-chain confirmation that a specific Base USDC transfer occurred — including sender identity, exact amount, block number, and replay protection — before releasing goods, credits, or services. Prefer it over off-chain payment claims or webhook-only confirmation flows where tamper-proof verification matters. It is especially valuable in x402-native payment pipelines where the tx hash is already available.
Side effects
- Invalid or malformed tx hash returns an error or verified:false
- Transaction not found on Base returns verified:false
- Replay guard triggers if the same tx hash has been submitted before, indicating a double-spend attempt
- Network or RPC timeout when querying Base chain state
- Hash corresponds to a non-USDC or non-Base transaction, returning an error or unverified result
Output
Schema · Response
{
"type": "json",
"example": {
"from": "0x…",
"block": 53265431,
"verified": true,
"amount_usdc": "2.0"
}
}Tags
x402
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