Marketplace · API · x402

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

Is this x402 endpoint safe to pay? Check it before your AI agent pays an endpoint it has not used before. Returns a go / caution / no_go verdict, the recommended payment option (network and amount) and the reasons (payment would fail, payout address on the OFAC sanctions list, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min. Bulk: 1000 credits for $0.80 via /api/v1/credits.

Endpointhttps://x402-doctor.fizzl.eu/api/v1/preflight
Trust✓ Verified callable · 100% uptime over 1 checks · ~373 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0x6B0F4651eD42893ab58139938175E4a69f175F25
methodGET
last updated2026-11-11T15:16:38.197Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402-doctor.fizzl.eu/api/v1/preflight
# 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-d0d87b8fc94bd214

Search the whole marketplace from your agent (MCP)

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

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