Periodic Table API
Periodic Table is a simple tool for getting information about chemical elements. It returns information such as the atomic number, symbol, and more based on the element provided.
The Periodic Table API provides reliable and fast access to periodic table data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.
To use Periodic Table, you need an API key. You can get one by creating a free account and visiting your dashboard.
GET Endpoint
https://api.apiverve.com/v1/periodictableCode Examples
Here are examples of how to call the Periodic Table API in different programming languages:
curl -X GET \
"https://api.apiverve.com/v1/periodictable?name=hydrogen" \
-H "X-API-Key: your_api_key_here"const response = await fetch('https://api.apiverve.com/v1/periodictable?name=hydrogen', {
method: 'GET',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
});
const data = await response.json();
console.log(data);import requests
headers = {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
response = requests.get('https://api.apiverve.com/v1/periodictable?name=hydrogen', headers=headers)
data = response.json()
print(data)const https = require('https');
const url = require('url');
const options = {
method: 'GET',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
};
const req = https.request('https://api.apiverve.com/v1/periodictable?name=hydrogen', options, (res) => {
let data = '';
res.on('data', (chunk) => data += chunk);
res.on('end', () => console.log(JSON.parse(data)));
});
req.end();<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/periodictable?name=hydrogen');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
'X-API-Key: your_api_key_here',
'Content-Type: application/json'
]);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response, true);
print_r($data);
?>package main
import (
"fmt"
"io"
"net/http"
)
func main() {
req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/periodictable?name=hydrogen", nil)
req.Header.Set("X-API-Key", "your_api_key_here")
req.Header.Set("Content-Type", "application/json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
fmt.Println(string(body))
}require 'net/http'
require 'json'
uri = URI('https://api.apiverve.com/v1/periodictable?name=hydrogen')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'
response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
using var client = new HttpClient();
client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");
var response = await client.GetAsync("https://api.apiverve.com/v1/periodictable?name=hydrogen");
response.EnsureSuccessStatusCode();
var responseBody = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseBody);
}
}Authentication
The Periodic Table API requires authentication via API key. Include your API key in the request header:
X-API-Key: your_api_key_hereInteractive API Playground
Test the Periodic Table API directly in your browser with live requests and responses.
Parameters
The Periodic Table API supports multiple query options. Use one of the following:
Option 1: Get Element Information by Name
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
name | string | required | The name of the chemical element to get information about | - |
Option 2: Get Element Information by Symbol
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
symbol | string | required | The symbol of the chemical element to get information about | - |
Response
The Periodic Table API returns responses in JSON, XML, YAML, and CSV formats:
Example Responses
{
"status": "ok",
"error": null,
"data": {
"name": "Hydrogen",
"appearance": "colorless gas",
"atomic_mass": 1.008,
"boil": 20.271,
"category": "diatomic nonmetal",
"density": 0.08988,
"discovered_by": "Henry Cavendish",
"melt": 13.99,
"molar_heat": 28.836,
"named_by": "Antoine Lavoisier",
"number": 1,
"period": 1,
"group": 1,
"phase": "Gas",
"source": "https://en.wikipedia.org/wiki/Hydrogen",
"summary": "Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.",
"symbol": "H",
"xpos": 1,
"ypos": 1,
"wxpos": 1,
"wypos": 1,
"shells": [
1
],
"electron_configuration": "1s1",
"electron_configuration_semantic": "1s1",
"electron_affinity": 72.769,
"electronegativity_pauling": 2.2,
"ionization_energies": [
1312
],
"cpk-hex": "ffffff",
"block": "s"
}
}<?xml version="1.0" encoding="UTF-8"?>
<response>
<status>ok</status>
<error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<data>
<name>Hydrogen</name>
<appearance>colorless gas</appearance>
<atomic_mass>1.008</atomic_mass>
<boil>20.271</boil>
<category>diatomic nonmetal</category>
<density>0.08988</density>
<discovered_by>Henry Cavendish</discovered_by>
<melt>13.99</melt>
<molar_heat>28.836</molar_heat>
<named_by>Antoine Lavoisier</named_by>
<number>1</number>
<period>1</period>
<group>1</group>
<phase>Gas</phase>
<source>https://en.wikipedia.org/wiki/Hydrogen</source>
<summary>Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.</summary>
<symbol>H</symbol>
<xpos>1</xpos>
<ypos>1</ypos>
<wxpos>1</wxpos>
<wypos>1</wypos>
<shells>
<shell>1</shell>
</shells>
<electron_configuration>1s1</electron_configuration>
<electron_configuration_semantic>1s1</electron_configuration_semantic>
<electron_affinity>72.769</electron_affinity>
<electronegativity_pauling>2.2</electronegativity_pauling>
<ionization_energies>
<ionization_energie>1312</ionization_energie>
</ionization_energies>
<cpk_hex>ffffff</cpk_hex>
<block>s</block>
</data>
</response>
status: ok
error: null
data:
name: Hydrogen
appearance: colorless gas
atomic_mass: 1.008
boil: 20.271
category: diatomic nonmetal
density: 0.08988
discovered_by: Henry Cavendish
melt: 13.99
molar_heat: 28.836
named_by: Antoine Lavoisier
number: 1
period: 1
group: 1
phase: Gas
source: https://en.wikipedia.org/wiki/Hydrogen
summary: >-
Hydrogen is a chemical element with chemical symbol H and atomic number 1.
With an atomic weight of 1.00794 u, hydrogen is the lightest element on the
periodic table. Its monatomic form (H) is the most abundant chemical
substance in the Universe, constituting roughly 75% of all baryonic mass.
symbol: H
xpos: 1
ypos: 1
wxpos: 1
wypos: 1
shells:
- 1
electron_configuration: 1s1
electron_configuration_semantic: 1s1
electron_affinity: 72.769
electronegativity_pauling: 2.2
ionization_energies:
- 1312
cpk-hex: ffffff
block: s
| key | value |
|---|---|
| name | Hydrogen |
| appearance | colorless gas |
| atomic_mass | 1.008 |
| boil | 20.271 |
| category | diatomic nonmetal |
| density | 0.08988 |
| discovered_by | Henry Cavendish |
| melt | 13.99 |
| molar_heat | 28.836 |
| named_by | Antoine Lavoisier |
| number | 1 |
| period | 1 |
| group | 1 |
| phase | Gas |
| source | https://en.wikipedia.org/wiki/Hydrogen |
| summary | Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. |
| symbol | H |
| xpos | 1 |
| ypos | 1 |
| wxpos | 1 |
| wypos | 1 |
| shells | [1] |
| electron_configuration | 1s1 |
| electron_configuration_semantic | 1s1 |
| electron_affinity | 72.769 |
| electronegativity_pauling | 2.2 |
| ionization_energies | [1312] |
| cpk-hex | ffffff |
| block | s |
Response Structure
All API responses follow a consistent structure with the following fields:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains the API response data if successful, otherwise null | {...} |
Learn more about response formats →
Response Data Fields
When the request is successful, the data object contains the following fields:
| Field | Type | Sample Value |
|---|---|---|
name | string | |
appearance | string | |
atomic_mass | number | |
boil | number | |
category | string | |
density | number | |
discovered_by | string | |
melt | number | |
molar_heat | number | |
named_by | string | |
number | number | |
period | number | |
group | number | |
phase | string | |
source | string | |
summary | string | |
symbol | string | |
xpos | number | |
ypos | number | |
wxpos | number |
Headers
Required and optional headers for Periodic Table API requests:
| Header Name | Required | Example Value | Description |
|---|---|---|---|
X-API-Key | required | your_api_key_here | Your APIVerve API key. Found in your dashboard under API Keys. |
Accept | optional | application/json | Specify response format: application/json (default), application/xml, or application/yaml |
User-Agent | optional | MyApp/1.0 | Identifies your application for analytics and debugging purposes |
X-Request-ID | optional | req_123456789 | Custom request identifier for tracking and debugging requests |
Cache-Control | optional | no-cache | Control caching behavior for the request and response |
GraphQL AccessALPHA
Access Periodic Table through GraphQL to combine it with other API calls in a single request. Query only the periodic table data you need with precise field selection, and orchestrate complex data fetching workflows.
Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.
POST https://api.apiverve.com/v1/graphqlquery {
periodictable(
input: {
name: "hydrogen"
}
) {
name
appearance
atomic_mass
boil
category
density
discovered_by
melt
molar_heat
named_by
number
period
group
phase
source
summary
symbol
xpos
ypos
wxpos
wypos
shells
electron_configuration
electron_configuration_semantic
electron_affinity
electronegativity_pauling
ionization_energies
cpk_hex
block
}
}Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.
CORS Support
The Periodic Table API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Periodic Table directly from browser-based applications without proxy servers.
| CORS Header | Value | Description |
|---|---|---|
Access-Control-Allow-Origin | * | Accepts requests from any origin |
Access-Control-Allow-Methods | * | Accepts any HTTP method |
Access-Control-Allow-Headers | * | Accepts any request headers |
Browser Usage: You can call Periodic Table directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.
Rate Limiting
Periodic Table API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Periodic Table users.
| Plan | Rate Limit | Description |
|---|---|---|
| Free | 5 requests/min | Hard rate limit enforced - exceeding will return 429 errors |
| Starter | No Limit | Production ready - standard traffic priority |
| Pro | No Limit | Production ready - preferred traffic priority |
| Mega | No Limit | Production ready - highest traffic priority |
Learn more about rate limiting →
Rate Limit Headers
When rate limits apply, each Periodic Table response includes headers to help you track your usage:
| Header | Description |
|---|---|
X-RateLimit-Limit | Maximum number of requests allowed per time window |
X-RateLimit-Remaining | Number of requests remaining in the current window |
X-RateLimit-Reset | Unix timestamp when the rate limit window resets |
Handling Rate Limits
Free Plan: When you exceed your rate limit, Periodic Table returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.
Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.
Best Practices for Periodic Table:
- Monitor the rate limit headers to track your Periodic Table usage (Free plan only)
- Cache periodic table responses where appropriate to reduce API calls
- Upgrade to Pro or Mega for guaranteed no-throttle Periodic Table performance
Note: Periodic Table rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using Periodic Table on Free tier.
Error Codes
The Periodic Table API uses standard HTTP status codes to indicate success or failure:
| Code | Message | Description | Solution |
|---|---|---|---|
200 | OK | Request successful, data returned | No action needed - request was successful |
400 | Bad Request | Invalid request parameters or malformed request | Check required parameters and ensure values match expected formats |
401 | Unauthorized | Missing or invalid API key | Include x-api-key header with valid API key from dashboard |
403 | Forbidden | API key lacks permission or insufficient credits | Check credit balance in dashboard or upgrade plan |
429 | Too Many Requests | Rate limit exceeded (Free: 5 req/min) | Implement request throttling or upgrade to paid plan |
500 | Internal Server Error | Server error occurred | Retry request after a few seconds, contact support if persists |
503 | Service Unavailable | API temporarily unavailable | Wait and retry, check status page for maintenance updates |
Learn more about error handling →
Need help? Contact support with your X-Request-ID for assistance.
Integrate Periodic Table with SDKs
Get started quickly with official Periodic Table SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.
Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.
Integrate Periodic Table with No-Code API Tools
Connect the Periodic Table API to your favorite automation platform without writing code. Build workflows that leverage periodic table data across thousands of apps.





All platforms use your same API key to access Periodic Table. Visit our integrations hub for step-by-step setup guides.
Frequently Asked Questions
How do I get an API key for Periodic Table?
How many credits does Periodic Table cost?
Each successful Periodic Table API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful periodic table lookups.
Can I use Periodic Table in production?
The free plan is for testing and development only. For production use of Periodic Table, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.
Can I use Periodic Table from a browser?
What happens if I exceed my Periodic Table credit limit?
When you reach your monthly credit limit, Periodic Table API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.



