the402 endpoint detail

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api.magentlab.com calc sipa

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

answers 402

Acker 2015 SIPA: heart rate in bpm divided by cuff systolic pressure in mm Hg, rounded to two decimals. Elevated if the ratio exceeds the age-band cutoff: 1.22 (ages 4-6), 1.0 (7-12), or 0.9 (13-16). Ages 4-16 only; not for infants or adults 17 and older. Not a diagnosis of shock and not the adult shock-index greater-than-0.9 rule. magent does not measure vitals.

We sent a real GET 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
GET
Response latency
184 ms
Payment options
2 usable of 2
Last checked
2026-09-06T01:15:08.620Z (2h ago)
Category
search

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