the402 endpoint detail

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api.magentlab.com calc rome_iv_belching

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

answers 402

Stanghellini 2016 Rome IV belching disorders (B2). rome_iv_belching is true iff bothersome (severe enough to impact usual activities) belching from the esophagus or stomach more than 3 days a week, last-3-months criteria, 6-month onset, and belching_origin supragastric (B2a) or gastric (B2b). magent does not measure impedance or take a history. Not a diagnosis, not adult aerophagia, not child H1d

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
82 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:17:52.455Z (2h ago)
Category
finance-crypto

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