the402 endpoint detail

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api.magentlab.com calc nexus_chest_ct

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

answers 402

NEXUS Chest CT (Rodriguez 2015). Chest CT-Major is negative only when abnormal CXR, distracting injury, chest-wall, sternal, thoracic-spine, and scapular tenderness are all absent. Chest CT-All is negative only when those six and rapid deceleration mechanism are absent. Presence of a criterion does not mandate CT. Not a diagnosis, not the NEXUS Chest CXR instrument, and not Hoffman 2000 NEXUS C-sp

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
94 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:17:28.967Z (2h ago)
Category
other

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