Look up a periodic-table element by exactly one of `symbol` (e.g
Look up a periodic-table element by exactly one of `symbol` (e.g. "Fe"), `name` (e.g. "iron") or atomic `number` (1..118). Returns its number, symbol, name, standard atomic weight and whether that weight is a true standard atomic weight.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
465 msmedian answer time
$0.004listed price per call
$0.004price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://chem.openverbs.com/v1/element
| Category | Everything else |
|---|---|
| Provider host | chem.openverbs.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.004 | 465 ms |
Example input (from the provider)
{
"body": {
"name": "example",
"symbol": "exa"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"name": {
"description": "Element name, e.g. \"iron\".",
"maxLength": 20,
"minLength": 1,
"type": "string"
},
"number": {
"description": "Atomic number.",
"maximum": 118,
"minimum": 1,
"type": "integer"
},
"symbol": {
"description": "Element symbol, e.g. \"Fe\".",
"maxLength": 3,
"minLength": 1,
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}