Periodic Table API - APIVerve Documentation

API Overview

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. To use this API, you need an API key. You can get one by creating a free account and visiting your dashboard.

Important: Ensure that this API is enabled from within your dashboard to use it in your application. If not, you may receive a 403 error

View API in Directory

Client Libaries

To get started with minimal code, most of our APIs are available through client libraries:

Get Element Information by Name

1 Token

Get information about a chemical element

	
#GET Request
https://api.apiverve.com/v1/periodictable?name=hydrogen

x-api-key (required)

This is a required header on every request. Your API Key is found from within your dashboard

accept

This is an optional header. Set the value to application/json, application/xml, or application/yaml

namestring(required)

The name of the chemical element to get information about

Sample Request

	
import requests

url = "https://api.apiverve.com/v1/periodictable"

querystring = {'name': 'hydrogen'}

headers = {
	"x-api-key": "YOUR_API_KEY"
}

response = requests.get(url, headers=headers, params=querystring)

print(response.json())

	
using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
	Method = HttpMethod.Get,
	RequestUri = new Uri("https://api.apiverve.com/v1/periodictable?name=hydrogen"),
	Headers =
	{
		{ "x-api-key", "YOUR_API_KEY" }
	},
};
using (var response = await client.SendAsync(request))
{
	response.EnsureSuccessStatusCode();
	var body = await response.Content.ReadAsStringAsync();
	Console.WriteLine(body);
}

	
const data = null;

const xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener('readystatechange', function () {
	if (this.readyState === this.DONE) {
		console.log(this.responseText);
	}
});

xhr.open('GET', 'https://api.apiverve.com/v1/periodictable?name=hydrogen');
xhr.setRequestHeader('x-api-key', 'YOUR_API_KEY');
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.setRequestHeader('Accept', 'application/json');

xhr.send(data);

	
const request = require('request');

const options = {
  method: 'GET',
  url: 'https://api.apiverve.com/v1/periodictable?name=hydrogen',
  headers: {
    'x-api-key': 'YOUR_API_KEY'
  }
};

request(options, function (error, response, body) {
	if (error) throw new Error(error);

	console.log(body);
});

	
HttpRequest request = HttpRequest.newBuilder()
		.uri(URI.create("https://api.apiverve.com/v1/periodictable?name=hydrogen"))
		.header("x-api-key", "YOUR_API_KEY")
		.method("GET", HttpRequest.BodyPublishers.noBody())
		.build();
HttpResponse response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());

	
import Foundation

let headers = [
	"x-api-key": "YOUR_API_KEY"
]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.apiverve.com/v1/periodictable?name=hydrogen")! as URL,
				cachePolicy: .useProtocolCachePolicy,
                timeoutInterval: 10.0)

request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
	if (error != nil) {
		print(error as Any)
	} else {
		let httpResponse = response as? HTTPURLResponse
		print(httpResponse)
	}
})

dataTask.resume()

	
curl --request GET \
	--url 'https://api.apiverve.com/v1/periodictable?name=hydrogen' \
	--header 'x-api-key: YOUR_API_KEY'

Sample 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"
  },
  "code": 200
}

	
<Root>
  <status>ok</status>
  <error />
  <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>1</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>1312</ionization_energies>
    <cpk-hex>ffffff</cpk-hex>
    <block>s</block>
  </data>
  <code>200</code>
</Root>

	
status: ok
error: 
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
code: 200

Live Test API in Playground

Get Element Information by Symbol

1 Token

Get information about a chemical element

	
#GET Request
https://api.apiverve.com/v1/periodictable?symbol=H

x-api-key (required)

This is a required header on every request. Your API Key is found from within your dashboard

accept

This is an optional header. Set the value to application/json, application/xml, or application/yaml

symbolstring(required)

The symbol of the chemical element to get information about

Sample Request

	
import requests

url = "https://api.apiverve.com/v1/periodictable"

querystring = {'name': 'hydrogen'}

headers = {
	"x-api-key": "YOUR_API_KEY"
}

response = requests.get(url, headers=headers, params=querystring)

print(response.json())

	
using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
	Method = HttpMethod.Get,
	RequestUri = new Uri("https://api.apiverve.com/v1/periodictable?name=hydrogen"),
	Headers =
	{
		{ "x-api-key", "YOUR_API_KEY" }
	},
};
using (var response = await client.SendAsync(request))
{
	response.EnsureSuccessStatusCode();
	var body = await response.Content.ReadAsStringAsync();
	Console.WriteLine(body);
}

	
const data = null;

const xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener('readystatechange', function () {
	if (this.readyState === this.DONE) {
		console.log(this.responseText);
	}
});

xhr.open('GET', 'https://api.apiverve.com/v1/periodictable?name=hydrogen');
xhr.setRequestHeader('x-api-key', 'YOUR_API_KEY');
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.setRequestHeader('Accept', 'application/json');

xhr.send(data);

	
const request = require('request');

const options = {
  method: 'GET',
  url: 'https://api.apiverve.com/v1/periodictable?name=hydrogen',
  headers: {
    'x-api-key': 'YOUR_API_KEY'
  }
};

request(options, function (error, response, body) {
	if (error) throw new Error(error);

	console.log(body);
});

	
HttpRequest request = HttpRequest.newBuilder()
		.uri(URI.create("https://api.apiverve.com/v1/periodictable?name=hydrogen"))
		.header("x-api-key", "YOUR_API_KEY")
		.method("GET", HttpRequest.BodyPublishers.noBody())
		.build();
HttpResponse response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());

	
import Foundation

let headers = [
	"x-api-key": "YOUR_API_KEY"
]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.apiverve.com/v1/periodictable?name=hydrogen")! as URL,
				cachePolicy: .useProtocolCachePolicy,
                timeoutInterval: 10.0)

request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
	if (error != nil) {
		print(error as Any)
	} else {
		let httpResponse = response as? HTTPURLResponse
		print(httpResponse)
	}
})

dataTask.resume()

	
curl --request GET \
	--url 'https://api.apiverve.com/v1/periodictable?name=hydrogen' \
	--header 'x-api-key: YOUR_API_KEY'

Live Test API in Playground

Get All Elements

1 Token

Get information about all chemical elements

	
#GET Request
https://api.apiverve.com/v1/periodictable?list=all

x-api-key (required)

This is a required header on every request. Your API Key is found from within your dashboard

accept

This is an optional header. Set the value to application/json, application/xml, or application/yaml

Sample Request

	
import requests

url = "https://api.apiverve.com/v1/periodictable"

querystring = {'name': 'hydrogen'}

headers = {
	"x-api-key": "YOUR_API_KEY"
}

response = requests.get(url, headers=headers, params=querystring)

print(response.json())

	
using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
	Method = HttpMethod.Get,
	RequestUri = new Uri("https://api.apiverve.com/v1/periodictable?name=hydrogen"),
	Headers =
	{
		{ "x-api-key", "YOUR_API_KEY" }
	},
};
using (var response = await client.SendAsync(request))
{
	response.EnsureSuccessStatusCode();
	var body = await response.Content.ReadAsStringAsync();
	Console.WriteLine(body);
}

	
const data = null;

const xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener('readystatechange', function () {
	if (this.readyState === this.DONE) {
		console.log(this.responseText);
	}
});

xhr.open('GET', 'https://api.apiverve.com/v1/periodictable?name=hydrogen');
xhr.setRequestHeader('x-api-key', 'YOUR_API_KEY');
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.setRequestHeader('Accept', 'application/json');

xhr.send(data);

	
const request = require('request');

const options = {
  method: 'GET',
  url: 'https://api.apiverve.com/v1/periodictable?name=hydrogen',
  headers: {
    'x-api-key': 'YOUR_API_KEY'
  }
};

request(options, function (error, response, body) {
	if (error) throw new Error(error);

	console.log(body);
});

	
HttpRequest request = HttpRequest.newBuilder()
		.uri(URI.create("https://api.apiverve.com/v1/periodictable?name=hydrogen"))
		.header("x-api-key", "YOUR_API_KEY")
		.method("GET", HttpRequest.BodyPublishers.noBody())
		.build();
HttpResponse response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());

	
import Foundation

let headers = [
	"x-api-key": "YOUR_API_KEY"
]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.apiverve.com/v1/periodictable?name=hydrogen")! as URL,
				cachePolicy: .useProtocolCachePolicy,
                timeoutInterval: 10.0)

request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
	if (error != nil) {
		print(error as Any)
	} else {
		let httpResponse = response as? HTTPURLResponse
		print(httpResponse)
	}
})

dataTask.resume()

	
curl --request GET \
	--url 'https://api.apiverve.com/v1/periodictable?name=hydrogen' \
	--header 'x-api-key: YOUR_API_KEY'

Live Test API in Playground

Response Types

The Periodic Table API supports the following response content types:

application/json, application/xml, application/yaml

You can specify the response content type by setting the Accept header in your request. If you don't specify a content type, the API will default to application/json.

Authentication

The Periodic Table API uses an API Key to authenticate requests. You can view and manage your API key by visiting your dashboard.

Your API keys carry many privileges. To keep them from being abused, please do not share the keys on client-side code or Github etc. Keep them very secure.

To use any API, you must have it enabled from within your dashboard. Disabled APIs will fail to respond to your requests.

All requests made to the API must contain the header x-api-key in each of your requests. API requests without authentication will fail.

All API requests must also be made over secure HTTPS. Requests made over plain HTTP will fail.

Error Code	Meaning
401	Your request was made with invalid credentials. This error also appears when you don't pass the `x-api-key` header in your request.
403	Typically, this occurs when you are trying to access an API that you have not enabled.

Rate Limits

	
{
    "status": "error",
    "data": null,
    "error": "tokens have been depleted",
    "code": 429
}

Each subscription has its own monthly token limit. Your token count is based on your subscription plan. If you reach your limits, don't worry. You can always upgrade or downgrade at any time.

When you reach your limit, the service will stop responding and typically return an HTTP 429 response status code. The error will also contain a detailed JSON.

The Periodic Table API uses the following error code:

Error Code	Meaning
429	You have exceeded your rate limit and further requests will be denied until the next cycle.

Error Codes

For reference, the Periodic Table API uses the following error codes:

Error Code	Meaning
Code	Message
200	The request was successful. The response will include the requested data.
400	The request was invalid. The response will include a message that explains the error.
401	The request was not authorized. Usually, this means that the API key is missing or invalid.
403	This means that the request was trying to access a resource that it does not have permission to access.
404	This means that the resource you are trying to access does not exist.
429	This means that you have reached the rate limit. The response will include a Retry-After header that indicates how many seconds you need to wait before making a new request.
500	This means that there was an error on the server side. We are alerted when this happens and we will work to fix it as soon as possible.

Periodic Table API Reference

API Overview

Client Libaries

Get Element Information by Name

Request Headers

Request Parameters

Sample Request

Sample Response

Get Element Information by Symbol

Request Headers

Request Parameters

Sample Request

Get All Elements

Request Headers

Sample Request

Response Types

Authentication

Rate Limits

Error Codes

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