Check your CSV. Pay only if you need more.
Spot broken columns and duplicate rows for free in your browser. For a hosted machine-readable report with type warnings, review the live 0.005 USDC price, connect your own EVM wallet and approve one payment yourself.
Free mode uploads nothing. The paid API is separately hosted by the same beneficial owner on VM5; buyers must opt in before their CSV is sent. This checkout is an untested-with-real-wallet beta; no buyer-paid POST success has been independently verified yet.
1. Free local check — no wallet
Paste your own non-confidential CSV (up to 32 KiB UTF-8) or load our fictional example. Only counts and heuristic warnings are displayed here; no upload or charge.
Local 32 KiB CSV parser: quoted fields, escaped quotes, missing cells, ragged rows, duplicate headers/rows and spreadsheet-formula prefix warnings. Not a semantic, accounting, compliance, malware or spreadsheet safety certification.
2. Optional hosted CSV quality report
Hosted report adds type-pattern, date/number/email checks and row/column positions. Its first unpaid quote already sends your CSV to VM5. Skip this section if you only want privacy-first local results.
Price may be different when you next visit. This buyer screen refuses changes to token, chain, amount or recipient and does not initiate an unknown-price transaction.
3. Connect a wallet and pay once (optional)
Browser checkout uses an injected EVM wallet such as MetaMask. Connecting alone does not pay. Your wallet must be on Base mainnet and hold at least 0.005 native Circle USDC; the x402 facilitator submits the gasless EIP-3009 authorization. Do not paste a recovery phrase or private key here. This checkout never asks for ERC-20 approvals, staking, or swapping.
No payment has been requested. Start with the free local preview.
Important: if your wallet says a payment is pending or the server times out after a signature, do not click again. Check the original wallet history and the merchant receipt first. This client does not auto-retry signed payments. A 402 price quote is not a successful payment.
Hosted report (shown only after a real paid response)
No paid report requested.
What you get and what we cannot promise
The free checker runs in your browser. The paid report is from the original VM5 CSV API. It checks CSV structure and pattern mismatches; it does not confirm business correctness, financial compliance, security or vendor reputations. Purchase authorization and any customer data transfer are solely your decision.
The original merchant already received payment for different **synthetic GET API products**. There are zero independently proven paid buyer-owned CSV POST orders as of this release. Neither a page visit nor a wallet connection is income.
Audit the buyer checkout source · Read the strict price guard · Use the free-only checker
한국어: 무료 검사는 브라우저에서만 실행됩니다. 유료 검사는 해당 CSV를 VM5 서버로 전송한 뒤, 구매자가 자신의 지갑에서 Base 메인넷 USDC 0.005를 직접 승인하는 방식입니다. 지갑 연결·가격 확인만으로 결제되지는 않으며, 자동 재결제도 하지 않습니다. 개인정보·계좌정보·비밀키를 입력하지 마세요.