Marketplace · API · x402

badhttp.dev/402/pay/base

badhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base mainnet and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose.

Endpoint	`https://badhttp.dev/402/pay/base`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~1175 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x2b14ad50d63c7fee5a33847f95153ac37a690170
method	GET
last updated	2026-10-31T10:23:37.961Z

Use it

Call it (an x402 client pays automatically)

curl -i https://badhttp.dev/402/pay/base
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-7132d2a7914e2586

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}