Your API returns 402. Why can't a browser pay it?

What the 15 USDC pilot actually delivers

1. Observed-versus-required matrix: HTTP 402 and OPTIONS response status, Origin/method/header allow-list, PAYMENT-REQUIRED exposure, Content-Type, cache and Vary.
2. Root-cause priority list: confirmed evidence versus uncertainty; distinctions between POST schema validation and a missing paywall.
3. Implementation sketch: original framework-specific configuration example or pseudocode (not installed on your server).
4. Acceptance tests: two reproducible, read-only/unsigned commands with expected headers, plus a human checklist for your own paid test if you choose to run one.

Format: one plain-text or Markdown report for one public endpoint and one Origin, with one clarification round on the original report scope if agreed in writing. Seller availability, delivery date, exact inputs, review procedure and cancellation/refund terms must be agreed by email before ordering. The 15 USDC is a proposed fixed pilot price, not an invoice.

Pay only after agreeing to an actual job

1. Check free first. Use the MIT smokecheck. If it already resolves your issue, no purchase is needed.
2. Request an individual quote. Email onecursor1@gmail.com with framework, intended method, browser Origin and a summary of sanitized CORS header names/allow values. Do not include signed payment data, customer information, credentials or private URLs. Sending email reveals your address to the seller.
3. Wait for a written acceptance. Receive a scope and unique invoice reference, payee network/token/address confirmation, delivery window, cancellation/refund conditions and agreed payment timing. Do not send any USDC before that confirmation.
4. If you choose to pay, send the exact agreed USDC. Existing receive-only seller payout rail is Base mainnet (chain ID 8453) and native Circle USDC token 0x833589fCD6eDb6E08f4C7C32D4f71b54bdA02913. Only after agreement, verify the signed-off seller recipient with the seller. This page never signs, initiates or requests access to a wallet.
5. Verification and delivery. Seller matches a real unique finalized external USDC transfer to your agreed order; the report is shared using the agreed communication channel. Token transfers cannot automatically be reversed and no refund automation is offered.

No self-purchases or fabricated reviews. As of 20 October 2026 this manual pilot has zero verified external paid customers and zero received sales. Prior unrelated receipts from the same owner's other tools are not attributed to this offer.

Prefer machine-payable micro QA?

For developers with their own compatible x402 buyer client, our same-owner Soul.Markets service offers a separate $1.50 nominal public-header remediation blueprint (provider fee and signed checkout are external). It does not include this bespoke $15 scope, and no customer purchase of that service has been verified.

Tell us which part is actually worth paying to fix

If a real browser x402 issue cost you time, we welcome a nonbinding note with the problem, framework, rough engineering time lost and your honest willingness to pay (including $0). This is not a paid contract or a guaranteed response. Please share only fictional or sanitized samples; GitHub issues are public.

Google processes requests and responses. The form accepts the problem category, a nonbinding willingness-to-pay choice including $0, and optional safe technical text or contact email. The seller sees the answers. A response is not a paid booking and we cannot guarantee an individual reply. Never provide real payment signatures, confidential endpoints, customer CSVs, wallet/seed phrases, transaction histories or credentials. For a serious contract inquiry, email our original seller directly; this requires separate written terms before any USDC transfer.

Independent public feedback, not a sale: On 20 October 2026, an unrelated x402 contributor reproduced our same-owner live merchant's unsigned POST 402 and OPTIONS 204 and noted that a schema-valid JSON body is required to reach this POST-only paywall. That verification is external, but neither an endorsement, commission, signed paid retry nor evidence of a paying customer.

Evidence transparency: the sample report is entirely synthetic, not client work. The tested CLI has shown the expected unpaid HTTP 402 and OPTIONS on a separate service owned by the same person. Neither is evidence of an independent customer payment.