Marketplace · API · x402

x402-doctor.fizzl.eu/api/v1/preflight/deep

Should my agent pay this expensive x402 endpoint? Call it before a costly or repeated payment. Returns the go / caution / no_go verdict plus the full diagnosis, the endpoint's check history per day over 30 days, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint. Bulk: 1000 credits for $0.80 via /api/v1/credits.

Endpoint	`https://x402-doctor.fizzl.eu/api/v1/preflight/deep`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~840 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	0x6B0F4651eD42893ab58139938175E4a69f175F25
method	GET
last updated	2026-11-11T03:27:46.991Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402-doctor.fizzl.eu/api/v1/preflight/deep
# 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/x402-5ed0f3ac7057ef37

Search the whole marketplace from your agent (MCP)

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