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Periodic Table Element Lookup API
x402
Periodic Table Element Lookup API is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Returns comprehensive data for any of the 118 chemical elements given a symbol, name, or atomic number
Price / call$0.002
Success—
StatusUnknown
How this service works
Periodic table API: complete data for any of the 118 chemical elements — look up by symbol (Fe), name (iron), or atomic number (26). Returns atomic mass, category, phase at STP, period/group, electron configuration, electronegativity, melting and boiling points, density, electron shells, and a summary. For chemistry, materials, education, and science agents. Attributed dataset.
Output
A structured record for the requested element containing atomic mass, element category (e.g. transition metal), phase at STP (solid/liquid/gas), period and group numbers, full electron configuration string, electronegativity value, melting and boiling points (in Kelvin), density, electron shell counts, and a plain-language summary paragraph.
Example use cases
Example prompt
“What are the full properties of iron — atomic mass, melting point, electron configuration, electronegativity, and everything else from the periodic table?”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/element-lookupWhen to prefer
Use this endpoint when an agent needs authoritative, structured chemistry data for a specific element — especially when multiple properties are needed at once (mass, configuration, phase, electronegativity, etc.). Prefer over scraping Wikipedia or using an LLM's internal knowledge when accuracy and structured output are required. Ideal for chemistry education tools, materials science pipelines, and science agents that need reliable, citable element data.
Side effects
- Unknown or misspelled element symbol/name returns an error or empty result
- Atomic number out of range (>118 or <1) returns an error
- Ambiguous input (e.g. partial name) may fail to resolve
- Network or payment authorization failure returns HTTP 402 or 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| element | string | symbol, name, or atomic number |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "Iron",
"symbol": "Fe",
"category": "transition metal",
"atomic_mass": 55.845,
"atomic_number": 26,
"melting_point_k": 1811.15
}
}Tags
x402
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