# Forgemesh Periodic Table API

> Forgemesh Periodic Table API is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-16).

Returns full elemental data for any of the 118 chemical elements, including atomic mass, category, phase, electron configuration, electronegativity, melting/boiling points, and density, looked up by symbol, name, or atomic number.

## Facts

- Endpoint: POST https://x402.forgemesh.io/periodic-table
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/forgemesh-periodic-table-api-3509ba0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5K4XSS288tVVOKSk9ebmb

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 forgemesh-periodic-table-api-3509ba0c -d '<json body>'
```

Example prompt: What are the full properties of gold — atomic mass, electron configuration, electronegativity, melting point, boiling point, density, phase, and category?

## When to prefer this

Use this endpoint when you need structured, machine-readable elemental data for any of the 118 known chemical elements — ideal for chemistry applications, educational tools, materials lookup, or any workflow requiring precise elemental properties like atomic mass, electron configuration, or thermodynamic data. Prefer this over a general encyclopedia API when you specifically need tabular/structured elemental data rather than prose descriptions.

## Known failure modes

- Element not found if the symbol, name, or atomic number is invalid or misspelled — likely a 404 or error field in response
- Atomic number out of range (>118 or <1) returns an error
- Ambiguous or partial names may fail to match — full element name or standard symbol recommended
- Payment failure if USDC balance is insufficient for the $0.002 per-call fee

## How this service works

Periodic table API: full data for any of the 118 elements by symbol, name, or atomic number — atomic mass, category, phase, electron configuration, electronegativity, melting/boiling points, density, and more.

## Output

A structured data object with comprehensive elemental properties for the requested element, including atomic mass, atomic number, symbol, name, category (e.g. noble gas, transition metal), standard phase, electron configuration, electronegativity (Pauling scale), melting point, boiling point, and density.

## 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/forgemesh-periodic-table-api-3509ba0c/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)