the402 endpoint detail

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api.magentlab.com calc subtle_stemi

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

answers 402

Driver 2017 4-variable formula for normal-variant STE in V2-V4 (early repolarization) versus subtle LAD occlusion: formula_value = 0.052*QTc_ms - 0.151*QRS_V2_mm - 0.268*R_V4_mm + 1.062*STE60_V3_mm, 3 decimals. lad_occlusion_suggested is true iff the value is ≥18.2 (derivation highest-accuracy cutpoint). Intended only when ≥1 mm STE in V2-V4 without obvious occlusion features. magent does not read

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
78 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:17:29.752Z (2h ago)
Category
other

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