the402 endpoint detail

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api.magentlab.com calc ball

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

answers 402

Soumerai 2019 BALL score for relapsed or refractory CLL. Four caller-assigned 1-point flags (max 4): beta-2-microglobulin at the paper's published cutoff (>=5 mg/dL), LDH > laboratory ULN, anemia (Hb <110 g/L women or <120 g/L men), and time from initiation of last therapy <24 months. Risk low 0-1, intermediate 2-3, high 4. magent does not assay labs or convert B2M mg/L vs mg/dL. Not a treatment r

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
84 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:17:56.622Z (2h ago)
Category
other

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