Check your USDC payout list before you sign.

Paste CSV or open a local file.

Required columns are address,amount; optionally include chain,token,memo. Column names are case-insensitive. Amount is decimal USDC (not atomic units). Any file you choose is read on your own device and never uploaded by this page.

Run the same checker offline from Node.js.

Use our original free Base USDC payout CSV CLI for regular contractor payroll or bounty-payout list checks. It takes a local file or stdin, prints only issue codes and row positions, and exits with a failure status on bad payout input. No npm login, wallet connection, private keys, RPC or customer file uploads.

CLI install guide, commands and exit codes ↗ Versioned open-source release ↗

The free CLI is only a syntax review, not a confirmed payment or a legal/financial safety certification. The paid API below does generic CSV analysis and does not verify crypto payout addresses.

Building a recurring CSV QA workflow?

Unpaid developer test — this returns only an HTTP 402 quote; it does not charge your wallet:

curl -i 'https://vm5-openapi-x402.onrender.com/v1/csv-report'
# Expected: HTTP 402 + PAYMENT-REQUIRED
# An x402 v2 compatible wallet can choose whether to authorize.

The merchant and x402 facilitator handle actual paid requests. We do not provide browser one-click payments or ask for any private signing keys. Historical outside paid API calls have occurred, but there are no proven repeat human subscriptions or guaranteed availability.

Does your payroll or bounty CSV use different columns?

The free reviewer checks a standard payout-list format, but your actual export might use wallet_address, usdc_amount or network_id. We can propose a narrow 29 native Base USDC indicative fixed-price adapter pilot: one offline mapping script, 10+ synthetic tests and one in-scope correction. This is custom development, not required to use the free checker, and not a financial security audit.

See the paid CSV adapter pilot and request a free written quote ↗

A public request is NOT a charge or signed order. We use only fake data until source rights, price, lawful Korea-compatible payout and customer acceptance terms are agreed. Please do not send real payroll, wallet addresses, seeds or client information.

Want to associate reported payout events with actual invoice IDs?

The free Base USDC invoice-to-reported-transfer CSV matcher reviews two nonsecret CSV extracts locally. It flags duplicated ERC-20 event IDs, reported partial payments, pending rows, and ambiguous shared recipient wallets. Unlike the payout syntax checker, it requires both an invoice CSV and event CSV. Neither product verifies onchain settlement or accounting status.

Try the invented local invoice example — no wallet or upload ↗

Inspect the transaction record after an authorized payout.

This VM5 payout-list checker can detect a repeated payee before funds move. It cannot tell whether tokens actually arrived. If a payment has already been sent, a separate free, browser-local Base USDC CSV receipt review by our same-owner VM3 project can help compare user-supplied candidate transfer-log records, tx hashes, log indices, matching payees, chain/token metadata and partial-payment states.

Review candidate Base USDC receipt CSV records — free ↗

Separate stage, not an independent chain proof. That VM3 tool checks your supplied CSV only without RPC, wallet access or transfers. It marks evidence candidate_unverified; it does not prove actual on-chain settlement, tax compliance, recipient ownership or payment finality. For real money, independently match chain receipts against the genuine transaction hash, token, network, beneficiary, invoice and authorization records before marking an invoice paid.

Find the free checker useful?

The tool is free. You may optionally send native Circle USDC on Base mainnet (chain ID 8453) to the VM5 Delivery Lab public receive-only address below as voluntary support. Verify the recipient and chain independently in your wallet.

0x6b01efA0705E91a7aca54271510bf9e594717f34

Canonical Base USDC contract: 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913

Important: Direct USDC transfers are optional tips, not orders. Sending USDC does not purchase the x402 API, guarantee a report, establish a contract or entitle you to a refund. Never send tokens on an unsupported network, never share wallet keys, and do not transfer based on this CSV check alone.

Check the data. Confirm the payment separately.

The program validates address format, not EIP-55 checksum validity or address ownership. It cannot check address sanctions, lost wallets, wrong beneficiaries, chain state, gas, token balances, recipient promises, transaction settlement or contract risk. No automatic payout or financial advice is provided.

We deliberately limit input size to 64 KiB and 500 rows. The parser recognizes CSV quotes, escaped quotes and embedded line breaks. Diagnostic export contains only row/column positions and issue types, excluding entered wallet addresses and cell values. No tracking, telemetry, wallet RPC, external scripts or uploads are used.

For larger or regulated distributions, obtain independent checks, legal/compliance review and an actual sender-wallet transaction simulation before approving any payment. See the official x402 HTTP transport for payment-protocol details and Circle's USDC information.