the402 endpoint detail

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aialign.halowerk.com v1 confidence-calib

https://aialign.halowerk.com/v1/confidence-calib

answers 402

Compares scalar confidence with binary correctness, calculates mean squared Brier loss, partitions confidence into caller-selected equal-width bins and reports expected and maximum calibration error. It does not validate labels, correct class imbalance or prove calibration beyond the supplied sample.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.003
Network
base
Pay to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
575 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:23:18.910Z (2h ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Faialign.halowerk.com%2Fv1%2Fconfidence-calib"