MailboxValidator Single Email Validation API

MailboxValidator Single Email Validation API

The Single Validation API does validation on a single email address, disposable email/free email provider and returns all the validation results in either JSON or XML format.

API description

The Single Email Validation API does validation on a single email address to help you eliminate invalid and unreachable email addresses. It checks for email syntax, MX record, MX server connection, email greylisting, free email, disposable email, suppressed email, role email, high risk email, catch-all email and so on. See immediate results for your email validation. Results returned in either JSON or XML formats.

API Documentation


The Single Email Validation API does validation on a single email address and returns all the validation results in either JSON or XML format.


MailboxValidator Free Email Checker API - Endpoint Features
Object Description
key [Required] API license key.
format [Optional] Return the result in json (default) or xml format. Valid values: json | xml
Test Endpoint


                                                                                                                                                                                                                            {"Example Response":"No response example available for now."}

MailboxValidator Free Email Checker API - CODE SNIPPETS

curl --location --request GET '' --header 'Authorization: Bearer YOUR_API_KEY' 


API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the MailboxValidator Single Email Validation API REST API, simply include your bearer token in the Authorization header.


Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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The Single Email Validation API is a powerful tool that validates individual email addresses to identify and eliminate invalid or unreachable email addresses. It checks various aspects such as email syntax, MX record, server connection, greylisting, and more to provide accurate validation results.

The API thoroughly examines the structure and format of an email address, checking for common syntax errors such as missing or misplaced characters, invalid symbols, and incorrect formatting. It ensures that the email address follows the standard syntax rules.

The API verifies the MX (Mail Exchanger) record associated with the email address domain to ensure that it points to a valid mail server. It also establishes a connection with the server to validate its responsiveness, ensuring that emails can be sent to and received from the address successfully.

Yes, the Single Email Validation API identifies free email services (e.g., Gmail, Yahoo) and disposable email services (temporary email providers commonly used for spam or fraudulent activities). This helps businesses avoid engaging with unreliable or untraceable email sources.

Suppressed email addresses are typically those opted out of receiving emails or marked as "do not contact." The API checks if an email address is suppressed to respect user preferences and comply with email marketing regulations. Additionally, it identifies role-based email addresses (e.g., [email protected], [email protected]) that may have limited engagement potential.

Zyla API Hub is, in other words, an API MarketPlace. An all-in-one solution for your developing needs. You will be accessing our extended list of APIs with only your user. Also, you won't need to worry about storing API keys, only one API key for all our products is needed.

Prices are listed in USD. We accept all major debit and credit cards. Our payment system uses the latest security technology and is powered by Stripe, one of the world’s most reliable payment companies. If you have any trouble with paying by card, just contact us at [email protected]

Sometimes depending on the bank's fraud protection settings, a bank will decline the validation charge we make when we attempt to be sure a card is valid. We recommend first contacting your bank to see if they are blocking our charges. If more help is needed, please contact [email protected] and our team will investigate further

Prices are based on a recurring monthly subscription depending on the plan selected — plus overage fees applied when a developer exceeds a plan’s quota limits. In this example, you'll see the base plan amount as well as a quota limit of API requests. Be sure to notice the overage fee because you will be charged for each additional request.

Zyla API Hub works on a recurring monthly subscription system. Your billing cycle will start the day you purchase one of the paid plans, and it will renew the same day of the next month. So be aware to cancel your subscription beforehand if you want to avoid future charges.

Just go to the pricing page of that API and select the plan that you want to upgrade to. You will only be charged the full amount of that plan, but you will be enjoying the features that the plan offers right away.

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You can contact us through our chat channel to receive immediate assistance. We are always online from 9 am to 6 pm (GMT+1). If you reach us after that time, we will be in contact when we are back. Also you can contact us via email to [email protected]

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