the402 endpoint detail

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x402.forgemesh.io mole-mass-converter

https://x402.forgemesh.io/mole-mass-converter

payable

Mole-to-mass-to-molecule-count converter for any chemical formula: supply a mass in grams or an amount in moles and get the full conversion set computed from the compound's exact molar mass. Useful for lab calculations, dosage prep, and chemistry education tools.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.003
Network
base
Pay to
0x850363a27F0aC6fEb9C7a3eC4C1d295262dF9432
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
40 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:17:28.451Z (3d ago)
Category
other

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.forgemesh.io%2Fmole-mass-converter"