the402 endpoint detail

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api.magentlab.com calc rule_of_nines

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

answers 402

Adult Wallace 1951 rule of nines: percent TBSA from eight region fractions (0 none, 0.5 half, 1 full) using head 9, each arm 9, anterior trunk 18, posterior trunk 18, each leg 18, perineum 1. magent does not examine the burn. Not Lund-Browder and not a Parkland fluid order (Parkland takes tbsa_percent separately).

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
63 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:17:31.977Z (2h ago)
Category
other

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