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x402.forgemesh.io formula-mass-calculator
https://x402.forgemesh.io/formula-mass-calculator
payable
Computes the exact molar mass in g/mol for any chemical formula, including nested parentheses like Ca(OH)2 and hydrates like CuSO4·5H2O, with a per-element mass-percentage breakdown. For lab dosing calculations, stoichiometry homework, and pharma formulation agents that can't afford a rounding mistake.
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
- 47 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-10T09:17:28.465Z (3d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.forgemesh.io%2Fformula-mass-calculator"