certbeforepay.com/v1/peer/challenge

Verify a peer certificate + policy

Endpoint	`https://certbeforepay.com/v1/peer/challenge`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xfcae7e8373264acf7f7d00e9d0171671dcdb095c
method	POST
last updated	2026-11-12T15:18:27.04Z

Use it

Call it (an x402 client pays automatically)

curl -i https://certbeforepay.com/v1/peer/challenge
# 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/x402-58c1acd11e19f88b

Search the whole marketplace from your agent (MCP)

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