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Paste any merchant URL. We run Manifest, CAIP-2, JSON resilience, and Bazaar compliance checks against it. No API key, no signup. 5 audits per IP per day on the public demo.
Stripe-billed. No long-term contract. Cancel from your dashboard anytime.
For trying it out on a single merchant.
For shipping x402 merchants.
For higher-volume catalog compliance.
x402 is the HTTP-402-based payment protocol from Coinbase. Strict-v2 conformance means your merchant endpoint serves a Bazaar-compliant manifest, advertises its CAIP-2 network/asset identifiers, returns resilient JSON, and exposes the 402 channel your buyers need. If any of those checks fail, gateways refuse to list you and customers see cryptic errors. This API runs all four checks in ~580 ms and returns actionable operator errors.
The same four checks as /validate: manifest_discovery, caip2_compliance, json_resilience, bazaar_compliance. The demo is rate-limited to 5 audits per IP per day — that's enough to convince you, not enough to abuse. Buy a Pro key for 500 audits/month; Enterprise gets you 5,000.
Yes, the demo is free and requires no signup. We log the URL you submit and your IP only for abuse detection (matching the rate limit). We do not sell, share, or persist the audit results anywhere. Buy a key and the same engine runs against your merchant endpoints; results are returned to you only.
Median ~580 ms end-to-end. We hit your endpoint, parse the response, run all four checks in parallel where independent, and return structured JSON. Failing checks ship with operator-actionable messages, not stack traces.
Yes — cancel from your Stripe dashboard any time; you keep access until the end of the billing period. We do not lock you in. Refunds for the current cycle are handled per Stripe's standard subscription refund policy; contact support for special cases.
The response includes the FAIL check name plus a message telling you what to fix. Example: "Payment-Required header missing" for the CAIP-2 check. No log scraping, no email back-and-forth — just paste the output into your team's channel.
x402 validator is built and operated by Gael L Chulim (gael@lastminutestickets.com). The engine is Apache-2.0 and open source (GitHub); the audit API is a hosted service on Render and billed through Stripe.