Based on our record, mailboxlayer API seems to be more popular. It has been mentiond 5 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've found a few "free" APIs which tell you if the email address exists or not, they have a free tier for certain amount of queries. Try https://mailboxlayer.com and https://www.zerobounce.net. Source: over 2 years ago
What I mean by valid is whether it is deliverable or not. Like this https://mailboxlayer.com/. Source: over 2 years ago
In Inspector we use the mailboxlayer.com API to validate emails. The service is also able to detect fake email addresses, temporary addresses, and the actual existence of an email address using MX-Records and SMTP. - Source: dev.to / about 3 years ago
You can look into APIs ( example https://mailboxlayer.com/ ) they provide info whether email is from a disposable domain. Source: over 3 years ago
Mailboxlayer.com — Email validation and verification JSON API for developers. 1,000 free API requests/month. - Source: dev.to / almost 4 years ago
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Email Verifier - Email verifier app lets you verify email.
NoParam - Validate emails in real time with our accurate bulk email validation API. Try our free email checker to reduce bounces and keep your email lists clean.
Email Checker - Email Checker offers a real-time API and bulk validation for list cleaning.
DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.