# Chemistry Calculators – Element Lookup

> Chemistry Calculators – Element Lookup is a paid API for AI agents from chemistry-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Looks up periodic table data for any element by symbol, name, or atomic number, returning weight, electron configuration, electronegativity, melting/boiling points, density, and more.

## Facts

- Endpoint: GET https://chemistry-calc.x402tookit.com/element-lookup?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chemistry-calculators-element-lookup-a77b6c04
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vzm9c2i4OmCIxbSyC9bnH

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability chemistry-calculators-element-lookup-a77b6c04
```

Example prompt: What are the atomic weight, electron configuration, electronegativity, and melting point of tungsten — can you look it up from the periodic table?

## When to prefer this

Use this endpoint when you need authoritative periodic table data — atomic properties, thermodynamic constants, electron configuration, or electronegativity — for a specific element identified by symbol, name, or atomic number. Prefer it over general chemistry calculation endpoints when the task is purely a property lookup rather than a formula computation or reaction calculation.

## Known failure modes

- Unknown or misspelled element input returns null or error fields
- Ambiguous input (e.g. a number that doesn't correspond to a known element) may return empty results
- Some rare or synthetic elements may have null values for properties like electronegativity or boiling point
- Network or payment failure returns no data

## How this service works

Periodic table lookup by symbol, name or atomic number: weight, configuration, electronegativity, melting and boiling points.

## Output

Returns a JSON object containing the element's name, symbol, atomic number, atomic weight (and its basis), electron configuration, Pauling electronegativity, melting and boiling points in both Celsius and Kelvin, density in g/cm³, standard state, common oxidation states, period, block, discovery year, and a summary description. May include source attribution and degraded/disclaimer flags.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "element"
     ],
     "properties": {
      "element": {
       "type": "string",
       "description": "Symbol (Fe), name (iron) or atomic number (26)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "name": {
       "type": [
        "null",
        "string"
       ]
      },
      "block": {
       "type": [
        "null",
        "string"
       ]
      },
      "period": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "symbol": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "discovered": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "atomicNumber": {
       "type": [
        "null",
        "number"
       ]
      },
      "atomicWeight": {
       "type": [
        "null",
        "number"
       ]
      },
      "boilingPointC": {
       "type": [
        "null",
        "number"
       ]
      },
      "boilingPointK": {
       "type": [
        "null",
        "number"
       ]
      },
      "meltingPointC": {
       "type": [

… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chemistry-calculators-element-lookup-a77b6c04/health.json
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