• Listomo’s New Email Verification API
  • What Can Our API Do For You?
    • Free To Use
  • How To Use Our API
    • cURL Example
    • JavaScript Example
  • Benefits for Companies and Developers
    • For the Power Users
  • Why We Built This Tool
  • Getting Started
  • Need to Build an Email List?

Listomo’s New Email Verification API

The cleanliness of your email list can directly impact the success of your email campaigns. That’s why we at Listomo are introducing our new API that provides a simple email verification service.

What Can Our API Do For You?

The new Listomo Email Verification API can identify whether an email address belongs to a free or disposable domain, or if its top-level domain (TLD) is valid. Examples of how to use it are below.

At the time of this writing we currently track over 167,000 disposable domains and nearly 4,000 free email domains. We keep our TLD list up to date with data sources directly from ICANN.

We update our database nightly to ensure that you have the most up-to-date information on email domains.

Free To Use

You can start using our API absolutely free with a rate limit of 10 requests per minute. This tier is perfect for developers or companies who need to validate email addresses in a development manner, or even for demos at conferences, internally, etc. (Paid users can access higher rate limits.)

How To Use Our API

Here are simple examples of how you can integrate our API into your systems using cURL and JavaScript (docs are available here):

cURL Example

curl -X GET 'https://api.listomo.com/v1/[email protected]' \
-H 'Authorization: Bearer your_api_key'

JavaScript Example

fetch('https://api.listomo.com/v1/[email protected]', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer your_api_key'
  }
})
.then(response => response.json())
.then(data => console.log(data))
.catch(err => console.error(err));

Result

{
  "domain": "gmail.com",
  "is_free_email": true,
  "is_disposable_email": false,
  "is_valid_tld": true,
  "last_updated_at": "2024-03-14T13:58:53.937-04:00"
}

Read the full documentation on this API here.

Benefits for Companies and Developers

Here are a few ways you can utilize our new API:

1. Enhanced Email List Hygiene: Automatically filter out email addresses from free or disposable providers, which are often linked to lower engagement and higher bounce rates.
2. Better Segmentation: Knowing the type of email domain can help you tailor your communication strategies to different audience segments.
3. Reduced Fraud Risk: By blocking disposable domains, you minimize the risk of fraud and enhance the security of yo
4. Eliminate Spammy Accounts and Tire Kickers: Many spammers, script kiddies and tire kickers use disposable email accounts (and sometimes free ones). By filtering these out, you can focus on engaging with genuine prospects and customers.

For the Power Users

For those who need more, we offer an unlimited access tier for our paid subscribers. This option is ideal for larger organizations that require high-volume email validations to keep their lists pristine and their engagements high.

Why We Built This Tool

At Listomo, we don’t just develop tools; we create solutions that we need internally. This API is part of our feature set that allows you to build company-exclusive email lists, which you can read about in our blog post on the topic here: “Elevate Your B2B Marketing with a Company Email Exclusive List”. We’ve been using this tool internally for over a year, and we’re now opening it up for everyone to use.

Getting Started

To get started, create an account and generate an API key. Once you have an API token you can then start using the API immediately. If you have any questions or need help, feel free to reach out to our support team at support at listomo.com.

Need to Build an Email List?

Interested in enhancing your email list management or looking to build your list? Here at Listomo, we employ this same API internally, allowing you to easily cultivate a robust contact list. With a simple toggle, you can include or exclude free and disposable domains. Just enable this feature on your list settings, and we handle the rest-ensuring that disposable and free domains are automatically filtered out. This customization is available for each list individually, giving you full control over your email interactions. This is available to all Listomo subscribers.

Start using Listomo today and optimize your email lists easily