What exactly is an API?

API is the acronym for Application Programming Interface, which is a software intermediary that allows two applications to talk to each other.

How to does an API work?

API is an interface that allows your application to interact with an external service using a simple set of commands.

Benefits of using an API?

API is like an open language, the rules of which are shared by a certain service. You can teach your application the rules of this language, so it can communicate with the service and access all the functions and data that the service is ready to share.

Top Domain Name APIs

Use the APIs in this collection to research domain names and their availability.

How to Create a Domain Availability Search App (Domainr API)
RapidAPI Blog

Collections

Categories

Whois Lookup

Whois Lookup API in Json or Xml

Instant domain search. Documentation available at https://domainr.com/docs/api

The Domain Checker API allows users to quickly and easily check the validity, availability, expiration, and DNS settings of a given domain name. With features such as keyword search and validation, it's an efficient tool for developers, businesses, and individuals looking to manage or purchase domain names.

WHOIS API (v2) returns well-parsed WHOIS records with fields in XML and JSON formats for any IPv4, IPv6 address, domain name, or email.

Returns well-parsed whois fields in XML and JSON formats. Use it to track domain registrations, check domain name availability, detect credit card fraud, locate users geographically. The service automatically follows the whois registry referral chains until it finds the correct whois registrars with the most complete whois data. Works over basic HTTP and avoices firewall-related problems of accessing Whois servers on port 43.

Domain Availability API lets you check instantly if a domain name is available to be registered.

Reputation

This API returns the reputation information for a given domain. data is pulled from Google Safe Browsing API and MyWOT

Domain Reputation

Domain Reputation API lets you build a risk profile for a given domain or IP address with a single score based on multiple data sources.

1.7

2,780 ms

100%

Domain Availability Checker

This API lets you check whether a domain is available for registration or not. Please report false positives.

30,617 ms

Name Toolkit

Name Toolkit is a domain name suggestion, registration and whois info provider. Our focus is on speed, simplicity and honesty.

15 ms

Domain Reputation

This API endpoint checks if a Domain name has been used as email registration, source of attacks and others malicious activities. It scores the reputation of the domain: the more negative the score, the riskier the domain. A positive score normally its a domain with good reputation, and a zero score means neutral. Moocher.io is a set of lists like IP, domains, emails, passwords, creditcard BIN/IIN. Some of them marked as 'abusers' by several groups and initiatives of users and communities, and others used to filter out potential abusers. Moocher.io can be defined as a Look up as a Service for developers and product companies that want to know in realtime if their existing or potential users have been classified as 'abusers' by one or more of these lists.

0.1

50 ms

Domain Name Search

Check the status and availability of domain names

0.2

26 ms

About this Collection:

Domain Name API

About domain APIs

Many domain name providers offer APIs that allow developers to perform actions such as registering a new domain name, domain renewal, domain availability API, perform WHOIS lookups, and much more.

What are domain APIs?

Domain checker APIs are server-side software hosted at a domain name registrar or a similar company. The software exposes specific endpoints or methods that developers can use to accomplish the goals of their programs.

How do domain APIs work?

Developers write programs that send commands to the API as a request. Requests and responses are often in JSON or XML format. Generally, reference documentation is available that explains the correct format and syntax. When the API receives the request, the server processes the request according to the parameters given. Once the processing is complete, the API returns a result to the program so it knows whether the request succeeded or failed and what action to take next.

Who is domain APIs for exactly?

Domain name APIs are for developers that want to programmatically integrate their software with domain name registries. Examples include businesses that resell domain names and businesses that provide domain search API or WHOIS lookup tools for their customers.

Why are domain APIs important?

Domain availability APIs allow developers to integrate directly with domain registrars to perform actions that customers want to do. Many domain name resellers make use of such APIs to provide a better customer experience that they might get elsewhere.

What you can expect from domain APIs?

Domain check API providers generally provide free documentation for developers that detail all of the available endpoints or methods that developers can use. The developer provided documentation outlines the correct syntax for each request as well as the format and structure of the response. Some domain checker API providers will also provide sample code or demo projects for developers to get started quickly.

API features typically include:

Get WHOIS data for a single domain name or bulk
Resolve IP addresses
Domain search API
Domain check API
Perform registration and renewal functions

Are there examples of free domain APIs?

There are various free domain name APIs available for developers. Each provides different capabilities so knowing your goals is important when selecting a provider. Google and Name.com are two popular free domain name APIs to explore.

Best Domain Name APIs

Domain Name API SDKs

All Domain Name APIs are supported and made available in multiple developer programming languages and SDKs including:

Node.js
PHP
Python
Ruby
Objective-C
Java (Android)
C# (.NET)
cURL

Just select your preference from any API endpoints page.