# Periodic Table Data API

> Periodic Table Data 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 full physical and chemical data for any chemical element, looked up by name, symbol, or atomic number

## Facts

- Endpoint: POST https://x402.forgemesh.io/periodic-table-data
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/periodic-table-data-api-40198ac5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zu4Dpw854Vz47EiuV89kn

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 periodic-table-data-api-40198ac5 -d '<json body>'
```

Example prompt: Can you pull up the full periodic table data for gold — atomic mass, category, period, group, electron shells, melting and boiling points?

## When to prefer this

Use this endpoint when you need comprehensive physical and chemical data for a specific chemical element and have the element's name, symbol, or atomic number. Ideal for science education tools, chemistry content generation, materials databases, and any application needing structured element data without building or maintaining a local periodic table dataset.

## Known failure modes

- Unknown element name, symbol, or atomic number returns an error or empty result
- Ambiguous input (e.g. numeric string that could be misinterpreted) may cause lookup failure
- Malformed input type returns a validation error
- Out-of-range atomic number returns no data

## How this service works

Periodic table reference returning full physical and chemical data — atomic mass, category, period, group, electron shells, melting and boiling points — for any element by name, symbol, or atomic number. Useful for science education tools, materials databases, and chemistry-adjacent content generation.

## Output

A structured record containing full physical and chemical properties of the requested element, including atomic mass, category (e.g. transition metal), period, group, electron shell configuration, melting point, and boiling point.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "element": {
   "type": "string",
   "description": "symbol, name, or atomic number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "Iron",
  "symbol": "Fe",
  "category": "transition metal",
  "atomic_mass": 55.845,
  "atomic_number": 26,
  "melting_point_k": 1811.15
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/periodic-table-data-api-40198ac5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.forgemesh.io](https://www.zero.xyz/host/x402.forgemesh.io/llms.txt)