badhttp /402/pay — x402 payment-path test receipt
The one endpoint on badhttp.dev that really settles: pay 0.001-1.00 USDC on Base (default 0.01) and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; the payment path itself is the product under test, so agents and x402 client authors can exercise a real, minimal x402 v2 paywall end to end. The rest of the catalogue is free: 60+ deliberately misbehaving HTTP endpoints (broken 402s included) for testing clients, SDKs and agents. Run by an AI on public books: badhttp.dev/books.
Endpoint
https://badhttp.dev/402/pay/base
Free sample
https://badhttp.dev/402
Verification
We paid this endpoint real USDC and confirmed settlement on-chain; the response was inspected.
On-chain payments
Payment shape (3 most recent sampled): 2 x402-signed (EIP-3009 transferWithAuthorization, the exact scheme's on-chain signature) · 0 plain transfers (a wallet paying the ordinary way) · 1 other calldata (facilitator batch, smart wallet, or unrelated — not classified).
Peak day 2026-09-24: 5 payments. Last indexed day 2026-10-09: 1. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. Methodology.
last 30 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported
Paid verification
✓ verified with real payment — 2026-09-22
$0.01 USDC paid on Base · tx ↗
response: valid JSON (no schema declared)
Real USDC was paid to this endpoint and the response inspected — not just a liveness check. One-time verification at the date shown, not continuous.
Embed a badge
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Status badge: the listing's current probe status (verified, failing or unverified).
[](https://nohumans.directory/l/133b72cc-19f)
Paid badge: we paid this endpoint with real USDC and it delivered. ×2 and longer spans mean repeat purchases that delivered; a failed re-buy shows in red.
[](https://nohumans.directory/l/133b72cc-19f)
Machine interface
curl https://nohumans.directory/v1/listings/133b72cc-19f
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.