NumVerify is a free, powerful REST API that validates national and international phone numbers based on the most recent international numbering plan databases. After passing a phone number into the simple request URL structure, the API returns a universally usable JSON response set containing the validation result, the requested number in its local and international format, and useful country, carrier, and line type information.

We believe that every online business that utilizes its customer's phone numbers should validate them to ensure frictionless communication and reduce undelivered messages. That is why we decided to offer 100 monthly validation requests for free. You can sign up for your free API Access Key here.

The numverify API is a product built and maintained by apilayer, an Austrian technology company aiming to help developers, startups and larger companies automate and outsource complex processes by serving them with dedicated and handy programming interfaces.

Our goal is to offer quick and simple access to our software with the objective of speeding up development of your applications and easing the burden on your back-end.

You can find the official developer documentation, which includes details on API requests, response objects, and error codes, at the following URL: https://numverify.com/documentation.

Yes, the Numverify API is a standard RESTful JSON API, which makes it easy to integrate into a wide variety of applications and systems, including CRMs, using standard API call methods.

While the documentation does not mention specific SDKs, it provides detailed information on how to construct API requests and interpret the JSON responses, which serves as a guide for developers to create their own code samples or integrations.

Our phone number format validation system is based on the most up-to-date international numbering plans containing complex syntax rules, carrier data, line type data and location information for all mobile and landline numbers in both national and international formats, for a total of 232 countries around the world. Only this way we are able to ensure the highest level of quality, reliability and accuracy for each validation result returned by the API.

Yes. Since we understand that your API requests contain may sensitive data, we offer paid customers the possibility to access the API and all data provided by and processed through it via industry-standard 256-bit HTTPS encryption. See the API's Documentation for details.

We do not process or store phone numbers for any purpose other than validation. See our Privacy Policy for details.

Every registered user is assigned a personal Access Key, a unique "password" that can be used to access and query the numverify API. If you are logged in, you can find it in your Account Dashboard and in all interactive links contained in the API's Documentation.

In your Account Dashboard you can reset your Access Key at any given time.

In order to make an API Request, you are required to attach your Access Key to a valid API endpoint URL, e.g: http://apilayer.net/api/check?access_key=YOUR_ACCESS_KEY

Pricing is based on the number of monthly API Requests offered for each individual Subscription Plan. Accessing any type of numverify API data using a valid API Access Key counts as one "API Request".

Users will be automatically notified via e-mail and on their Account Dashboard once at least 75%, 90%, and 100% of their monthly API Request allowance has been reached. After reaching 100% of the allowance, overages fees will apply so we make sure you won’t experience any disruptions and your website/application will keep running smoothly. You can learn more about overages billing here.

The numverify API's system status is being closely monitored around the clock. Since every effort is made to ensure the highest possible level of consistency, we are happy to announce that our API's uptime is at around 99.9%. At the current stage we are not offering any public statistics, but we will be happy to provide you with recent uptime reports - ask us »

A phone number verification API is a tool that validates the existence and format of a phone number in real-time. The Numverify API works by checking the submitted number against international numbering plan databases to determine its validity, country, and line type, returning the results in a structured JSON format.

The key benefits include real-time data validation, better internal data quality, and fraud prevention. The API provides essential information like line type (mobile, landline), carrier, and geographical location, which helps businesses cleanse databases, reduce bounce rates for SMS, and verify user information during registration.

The Numverify API ensures data privacy and security by supporting 256-bit HTTPS encryption for all API connections. This protects data transmitted between your application and the API from being intercepted.

The Free Plan is set out to be a "trial version" without a time limit, offering a volume of 100 monthly API requests.

Paid Subscription Plans feature significantly higher API request volumes, ensure secure data streams via 256-bit HTTPS Encryption, include unlimited and prioritised technical support, and offer a variety of must-have API functionalities.

In order to test the API and to get an idea of the product, you can simply sign up for the Free Plan.

As soon as you or your application requires more than 100 API requests per month and more professional API functionality, you would be well-advised to sign up for one of the paid Subscription Plans, starting at only USD 14.99 per month.

Payments can be made via Credit Card (Visa, MasterCard, Discover, Diner's Club). You can change your payment method at any given time in the Payment section of your Account Dashboard.

Yes. If you choose annual billing, the total price of your subscription plan will be up to 15% lower than the total amount you would pay with a monthly payment frequency.

You can initiate a cancellation or downgrade by selecting a new plan and providing at least one reason for your decision. The customer service team will cancel or downgrade your plan. Downgrades are not effective immediately; your platinum subscription will remain active until the end of the current billing period.

Yes, 256-bit HTTPS encryption is a standard security feature supported for all connections to the Numverify API, ensuring secure data transmission regardless of the plan.

To change your subscription from monthly to yearly billing, submit a request on the Contact Us page on the website following these steps:

Step 1: Sign in to your account

Step 2: Go to Contact Us page

Step 3: Fill out the form and choose the “Sales” subject for this request.

Step 4: In the text box, include your specific request for example “Change from Monthly to Yearly subscription.”

Platinum Support includes dedicated account management, priority bug fixes, and access to exclusive support resources. It ensures you receive top-tier assistance for any issues you encounter, helping you maintain and optimize your system performance.

The cost of Platinum Support varies depending on your subscription plan:
- Standard Plan: $479.88 billed annually
- Professional Plan: $599.88 billed annually
- Professional Plus Plan: $719.88 billed annually
- Enterprise Plan: Custom pricing billed annually

When you select a pricing plan, the Platinum Support option is automatically checked. You will see a checkbox after the price and before to “Platinum Support” with the corresponding annual price. You can uncheck this box if you do not wish to include Platinum Support.

When you select Platinum Support, your invoice will display “Selected: [Your Plan] + Platinum Support.” The total amount charged will include the cost of your chosen plan and the annual fee for Platinum Support. For example, if you select the Professional Plan, your invoice will read “$59.99/month + $599.88/year for Platinum Support.”

Yes, existing customers can upgrade their plans to include Platinum Support. The option will be automatically checked when viewing available plans, showing the respective annual fee for Platinum Support. You can select or unselect this option as needed.

The billing period for Platinum Support is annual. When you purchase Platinum Support, the renewal date will be one year from the purchase date. Your invoice will show the purchase date, renewal date, and the total annual amount for Platinum Support.

Yes, Platinum Support is an optional service, you can uncheck the Platinum Support box during the purchase process if you prefer not to include it.

Yes, you can switch back to standard support at any time. However, the change will take effect at the start of your next billing cycle. Contact our support team to adjust your plan.