{"uid":"cap_K-O-1ZTw1bpP1RSymVQYH","slug":"nightshift-usdc-transfer-verifier-fbe7a0cb","name":"Nightshift USDC Transfer Verifier","description":"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.","url":"https://103-119-2-176.sslip.io:8445/v1/package-100?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"from":"0x…","block":53265431,"verified":true,"amount_usdc":"2.0"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_WQYBJzCmsUB7FldizhICW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies Base USDC on-chain transfers by transaction hash, returning sender address, amount, block number, and replay-guard status.","exampleAgentPrompt":"Can you verify this Base USDC transfer for me — tx hash 0xabc123...def — and confirm who sent it, how much USDC, and what block it landed on? Also make sure it hasn't already been processed.","exampleUseCases":[{"title":"Payment confirmation before order fulfillment","prompt":"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."},{"title":"Replay attack prevention for a payment gateway","prompt":"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."},{"title":"Auditing a disputed crypto payment","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:34:38.165Z","isFirstParty":false,"canonicalSlug":"nightshift-usdc-transfer-verifier-fbe7a0cb"}