Secure Your Data With Validator APIs: A Beginner’s Guide

by | May 17, 2023

Today, the importance of data has started to gain more and more importance. The fact that the data of the enterprises are in the hands of other people brings great harm to the enterprises both materially and morally. Accordingly, many businesses are making new moves to increase data security. One of the easiest and most contributing steps among these moves is to use a validator API.

The validator API is an added step to prevent businesses from accidentally sending their data to a different address. It is designed to eliminate employee vulnerability. The most popular example today is the use of the number validator API. In this article, we will get to know the number validator API concept closely. Then we will learn how to use the most popular number validator API today.

What Is the Number Validator API?

Phone number validator API is a service developed to validate phone numbers. This API allows developers and businesses to add a layer of phone number validation.

It is used to minimize user or employee vulnerability in applications. It prevents important data, such as billing or password information, from being sent to the wrong phone number.

What Is the Validation Method Summary of the Number Validator API?

A number validator API’s primary validation method is to provide information on whether the phone number is valid or invalid. This API usually queries the phone number information it receives as a parameter from official telecommunication providers according to the country code. It provides the information obtained as a result of the query to the user.

Numverify API: The Best Phone Number Validate Method

Homepage of the Numverify Validator API

Numverify API is the most used phone number validator API in the market today. Many companies such as Huawei, Zoho, and Sproxil actively use this API.

Numverify API provides real-time phone number verification service for 232 countries, and it obtains the phone number verification processes of these countries from the official telecommunications providers of the countries. In this way, the error rate in the verification process is minimized.

It quickly integrates into all today’s programming languages. It provides sample code integrations of many programming languages in its powerful documentation.

What Are the Subscription Plans of the Numverify API?

subscription plans of the numverify api

Numverify API, which offers a number of validation processes in one place, has a budget-friendly pricing policy. It offers users four different subscription plans.

The first of these subscription plans is the free plan. The plan allows many developers to test this API, and it’s limited to 100 requests per month.

The first paid subscription plan is the Starter plan. It is the most preferred subscription plan by users. The price is $14.99 for 5,000 requests per month.

The most comprehensive subscription plan is the Enterprise plan. It is limited to 250,000 per month and is only $129.99.

How to Use Numverify for Validation Process?

In this section, we will test the Numverify API with the web browser caller. The first step we need to do before starting the testing process will be to get an API key.

Let’s register for one of the subscription plans of the Numverify API that we mentioned in the previous step. After registration, we will see our API key on the Dashboard page.

After obtaining the API key, we will test the number validator API. For this, let’s paste the following URL into the search section of our browser.

We see more than one parameter in the number validation URL of the Numverify API above. These parameters are:

access_key: The field where we will put the API key we obtained after registration

number: The number of the phone where the validation will be validated

format: The field where we specify the formatting preference of the JSON response

The JSON response we get when we send a request to this URL is as follows.

  "country_name":"United States of America",
  "carrier":"AT&T Mobility LLC",

As we can see from the “valid” file, which is marked as a boolean, this number is a valid number. Let’s test the URL below and view the JSON response of a non-valid number this time.

The invalid JSON response we will get is as follows.



It is the conclusion that as the importance of data increases, the methods developed to protect data will increase. While there are hundreds of ways to keep data secure, sometimes the simplest step is the one that makes the most contribution. The number validator API is the best example of this. A number validation process before sending data to users or confirming the user’s actions prevents many data vulnerabilities.

Start today​ the Numverify API, and easily protect your data


Q: What Are the Use Cases of the Number Validator API (Application Programming Interface)?

A: Number validator API (Application Programming Interface), a number validation type method, is used by many businesses in many areas today. Some use cases where this API is used are as follows:

  • Payment steps
  • Authentication
  • Mobile applications
  • Customer service
  • Data quality

Q: What Is the Numverify API’s Response Format?

A: An object in JSON format is returned to Numverify API users. It is also possible to format the return format by adding an extra parameter to this API.

Q: What Is the Best Implementation of a Number Validator API?

A: A number validator API does number validation for businesses. For this, adding it to a class or methods in the flow of this API authentication would be the best approach. For instance, verification of the user’s phone number before the payment transaction is completed in an e-commerce system.

Q: What Are the Error Codes of the Numverify API?

A: A: Numverify API has a structure to help developers understand errors. In case of an error, it provides an error code and description. Example error status codes are as follows:

  • 404 – not found
  • 101 – missing access key / invalid access key
  • 103 – invalid API function
  • 210 – no phone number was provided