the402 endpoint detail

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api.x402node.dev validate ip

https://api.x402node.dev/validate/ip

answers 402

IP address validator, IPv4 IPv6 detector, IP format check, private IP detection, loopback detection, link-local detection, multicast detection, RFC 1918, network classifier. Validate any IP address (IPv4 or IPv6) and classify as public/private/loopback/link-local/multicast/reserved. Accepts payment on Base or Solana — either network works.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.0022
Network
base
Pay to
0x4466d4A84b7c49a6A094ec6eef4a0712D6dd125e
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
46 ms
Payment options
2 usable of 2
Last checked
2026-09-06T01:23:58.498Z (21d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.x402node.dev%2Fvalidate%2Fip"