suryast/x402-check

CLI + npm library + GitHub Action + Chrome Extension + hosted API to validate x402 payment protocol endpoints

Endpoint	`https://a2alist.ai`
Trust	100% uptime over 1 checks · ~2585 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
docs url	https://github.com/suryast/x402-check
auth	none
source	x402_registry

Use it

Call it (an x402 client pays automatically)

curl -i https://a2alist.ai
# 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/4071

Search the whole marketplace from your agent (MCP)

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