Optional real payment by an independent buyer · not an automatic charge

Review your CSV for 0.005 Base USDC — only if you authorize it.

This is a direct buyer-side interface for our existing original VM5 API, not another merchant. Inspect the exact amount, official native Circle USDC token and destination before a wallet prompt. Your CSV is sent to the hosted API before payment when you request a quote; only submit data you may disclose.

Single x402 CSV structure preflight POST

0.005 native Circle Base USDC

Merchant URL: https://vm5-openapi-x402.onrender.com/v1/csv-preflight

Base chain: 8453. Official USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Expected payee: 0x6b01efA0705E91a7aca54271510bf9e594717f34

Not spending money?

Test for free instead.

Use the local CSV preflight on this site to inspect basic structure without uploading your data or connecting any wallet. Or read the real merchant's public unpaid 402 quote in our free x402 inspector.

Free CSV checker · Free x402 price inspector

1. Provide an authorized CSV

Maximum 32 KiB. Do not include customer private information, credentials, wallet recovery phrases or payment signatures. The service provider may have ordinary request logs. The paid service checks row/column structure and suspicious spreadsheet patterns, not the correctness of your business transactions or wallet ownership.

CSV to inspect

I control this data, have permission to submit it to the existing VM5 API for a payment quote, and understand it leaves this browser even before I buy.

2. Review price, then optionally purchase

No quote requested and no wallet connected. No payment attempted.

The exact public Base network, native USDC token, 0.005 price, expected payee and resource will appear here after a valid HTTP 402 quote.

A matching quote is not proof of merchant identity or delivery. The signing authorization may enable actual 0.005 USDC transfer. Check your wallet's exact EIP-712 transfer-with-authorization payload before approving. Never sign if you expected a different amount, token, network or merchant. Payment failures can still settle; do not repeat blindly.

No wallet connected. Browser wallet must support EIP-1193, Base mainnet and EIP-712 typed data; this is not verified on every wallet/hardware device. The page cannot switch networks automatically.

I have independently checked the on-screen 0.005 Base USDC price and full payee address, understand that a real authorization can spend my own funds, and approve at most one purchase attempt.

Payment flow status: This opt-in browser buyer is a limited initial implementation. Offline signing-guard tests pass, but no independent buyer-funded production checkout or paid report fulfillment has been verified end-to-end. Use only after reviewing code, and independently confirm wallet settlement. We do not hold buyer recovery keys, collect card payments or guarantee refunds or finality.

How a sale is accounted for

The free quote shows only the terms of one API call. It is not a receipt or an invoice.
Only an independent buyer may connect their own Base wallet, read and approve a fixed EIP-3009 USDC authorization, and choose to call the original hosted merchant.
The merchant must return an actual result. A browser HTTP 200 alone does not prove irreversible onchain payment, and a browser error does not prove the transfer failed.
A sale is credited to the operator only if a distinct external Base USDC token transfer is independently finalized and linked to authorized delivery. No buyer orders are claimed for this new checkout.

Alternative: use the original CLI buyer implementation in your own controlled environment. x402 specifications are maintained by the x402 Foundation.