Verify your x402 endpoint

You built a paid x402 API. Get an instant automated health and trust report on it - 402 correctness, settlement behavior, discovery readiness, and security - as a shareable permalink you can show a skeptical buyer or agent. Deep Review adds a manual security pass.

Paid in USDC on Base or Solana via x402 - no account, no subscription, no card. Two fixed tiers below, or email for a custom multi-endpoint quote.

What you get

An automated audit of your 402 challenge: version, scheme, network, asset, payTo, amount, and resource binding, scored 0-100 — across every rail you accept, Base and Solana both.
Settlement behavior check against real on-chain data - does a payment actually settle correctly to the wallet you expect. Base transaction hashes and Solana signatures are both supported.
Discovery readiness: Bazaar metadata, llms.txt, OpenAPI, and .well-known surfaces so agents can find and trust you.
Security and privacy flags (redirect/SSRF exposure, price sanity, PII leakage in responses).
A prioritized, plain-language fix list, plus a shareable permalinked report and a re-check after you fix.

Order and pay (USDC on Base)

Fill in your details, pick a tier, and pay in your browser with a Base wallet (Coinbase Wallet, MetaMask on Base, and similar) holding USDC. No account, no card. Your report is generated instantly and emailed to you with a shareable permalink; Deep Review's manual pass follows within 2 business days.

The button opens the secure x402 payment page to connect your wallet and pay in USDC on Base. Prefer to scope it first, need more than three endpoints, or want to pay programmatically from an agent? Email dev@surewhynot.app — still paid in USDC. (Developers: the routes /v1/order/health-report and /v1/order/deep-review accept a normal x402 client payment with contact and endpoint query params.)

Want to see the engine first?

The report is built on the same checks you can run yourself for free: the x402 Inspector decodes any 402 challenge, and the x402 Audit returns an automated 0-100 score. The paid report adds an AI-written expert read of the results, a prioritized fix plan, email delivery, and a shareable permalink; Deep Review adds a human security pass.

Building an agent that needs to verify payments programmatically instead? Use Settlement Assurance ($0.03/call) or its MCP tool.