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x402.forgemesh.io molar-mass
https://x402.forgemesh.io/molar-mass
payable
Molar mass API: compute the molecular weight of any chemical formula in g/mol — handles nested parentheses (Ca(OH)2, Fe2(SO4)3) and hydrates (CuSO4·5H2O). Returns the total, atom count, and a per-element breakdown with mass percentages. For chemistry, lab, pharma, and education agents.
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
- 46 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-10T09:17:28.666Z (3d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.forgemesh.io%2Fmolar-mass"