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ForgeMesh Molar Mass / Molecular Weight API
x402
ForgeMesh Molar Mass / Molecular Weight API is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Calculates the molar mass of any chemical formula in g/mol, with per-element mass contributions and percentage breakdowns, supporting nested groups and hydrates.
Price / call$0.003
Success—
StatusUnknown
How this service works
Molar mass API: the molecular weight of any chemical formula (H2O, C6H12O6, Ca(OH)2, CuSO4·5H2O) in g/mol, with a per-element mass breakdown and mass percentages. Nested groups and hydrates supported.
Output
Returns the total molar mass in g/mol for the given chemical formula, along with a per-element breakdown showing each element's absolute mass contribution and its percentage of the total molecular weight. Supports nested parenthetical groups (e.g. Ca(OH)2) and hydrate dot notation (e.g. CuSO4·5H2O).
Example use cases
Example prompt
“What's the molar mass of copper sulfate pentahydrate (CuSO4·5H2O)? Also break down how much each element contributes by mass.”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/molecular-weightWhen to prefer
Choose this endpoint when you need a programmatic, per-element breakdown of molecular weight for arbitrary chemical formulas — especially formulas with nested groups like Ca(OH)2 or hydrates like CuSO4·5H2O — rather than a simple lookup table or calculator that only handles simple linear formulas.
Side effects
- Invalid or unparseable chemical formula returns an error
- Unsupported characters or isotope notation may not be handled
- Unknown element symbols in the formula cause a parse failure
- Missing required 'formula' field returns a validation error
- Payment not completed or insufficient USDC balance results in 402 rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| formula | string | chemical formula e.g. C6H12O6 |
Output
Schema · Response
{
"type": "json",
"example": {
"atom_count": 3,
"composition": [
{
"count": 2,
"element": "H",
"mass_percent": 11.19
},
{
"count": 1,
"element": "O",
"mass_percent": 88.81
}
],
"molar_mass_g_per_mol": 18.015
}
}Tags
x402
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