tool / x402 doctor
x402 Doctor
Check any x402 endpoint from the vantage agent buyers actually call from — free.
Server-side probe, https only, 10s timeout, private/internal addresses blocked. Free — max 10 checks/minute.
What it checks
- Reachable — the request completes, and we flag Cloudflare/bot-wall symptoms (403 with bot-protection headers is the #1 silent x402 killer — it blocks agent buyers before they ever see your paywall).
- Returns 402 — the resource actually responds with HTTP 402 Payment Required.
- Valid JSON challenge — the 402 body parses as JSON.
- x402Version — present and recognized (1 or 2).
- accepts[] complete — scheme, network, amount, payTo, and resource are all present.
- Network is CAIP-2 — the network field matches the namespace:reference shape (eip155, solana, algorand, etc).
- Input schema — extensions.bazaar.info.input is present, so agent tooling and x402scan know what to send.
- Discovery doc — the origin's /.well-known/x402 exists and lists the resource.
We run this business on these rails ourselves — live endpoints, open-source receipts, honest numbers.
See the live x402 API → x402-receipts on GitHub Read our real revenue at /openx402 Setup — Done For You
Have an API? We’ll make it agent-payable. $149 flat: x402 paywall wiring on one endpoint you already run, pricing, machine-readable catalog listing, proven with a real paid test call. Delivered within 48 hours. You keep all keys — nothing hosted by us.