the402 endpoint detail

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api.magentlab.com calc fni

https://api.magentlab.com/api/calc/fni

answers 402

Tavaglione 2023 fibrotic NASH index (FNI) from AST, HbA1c, and HDL cholesterol. FNI = e^x/(1+e^x) with x = -10.33 + 2.54*ln(AST) + 3.86*ln(HbA1c) - 1.66*ln(HDL mg/dL). HDL may be mg/dL or mmol/L (×38.67). Rule-out ≤0.10; indeterminate between 0.10 and 0.33; rule-in ≥0.33. Not a biopsy, not FIB-4, not the NAFLD fibrosis score, not SAFE, and not BARD.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.005
Network
base
Pay to
0x836Be278f1739fB4308091cD1852F7971Bc19Ee2
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
57 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:17:30.714Z (2h ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.magentlab.com%2Fapi%2Fcalc%2Ffni"