the402 endpoint detail

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netz.halowerk.com v1 route-leak-risk

https://netz.halowerk.com/v1/route-leak-risk

answers 402

Looks at every AS path observed for a prefix and reports the ones that do not fit. Four patterns are checked. A path loop, where an AS appears twice with other ASes in between, which prepending does not produce and a leak does. An unusually long path, measured against the median length of all paths to the same prefix rather than a fixed number, because path length is a property of where you sit in

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.006
Network
base
Pay to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
563 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:38:42.739Z (6h ago)
Category
other

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fnetz.halowerk.com%2Fv1%2Froute-leak-risk"