StopMailing API alternatives

Disposable email addresses with a free, no-signup REST API. If it doesn't fit your project, here are the 10 best free Email APIs to use instead in 2026, out of 46 in the directory.

For reference, StopMailing API: No API key needed · 100% uptime (30 days) · Callable from the browser (CORS).

1. 1

   Kickbox API

   Online · 754 ms

   Email verification API. A free email API by Powered by Kickbox.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   mail.gw API

   Online · 602 ms

   API for creating temporary email accounts.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   mail.tm API

   Online · 625 ms

   Temporary Email Service. A free email API by Mail.tm.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   Vetto API

   Online · 1170 ms

   Check email domains in bulk for disposable providers and dead domains, no key needed.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5E

   Email Validator by LifeStep API

   Online · 1006 ms

   Validate email syntax and MX, detect disposable/role addresses, suggest typo fixes.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   MailSenpai DNS Check API

   Online · 1464 ms

   Check a domain's SPF, DKIM, DMARC and MX records and get what to fix, with the values to publish.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   Disify API

   Online · 2586 ms

   Validate and detect disposable and temporary email addresses.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   Cloudmersive Validate API

   Online · 174 ms

   Validate email addresses, phone numbers, VAT numbers and domain names.

   • 100% uptime (30 days)
   • Fast: 174 ms response
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
9. 9

   DropMail API

   Online · 1113 ms

   GraphQL API for creating and managing ephemeral e-mail inboxes.

   • No API key needed
   • 100% uptime (30 days)
   • HTTPS

   No authHTTPSCORS ?
10. 10

    Guerrilla Mail API

    Online · 1066 ms

    Disposable temporary Email addresses. A free email API by Guerrilla Mail API.

    • No API key needed
    • 100% uptime (30 days)
    • HTTPS

    No authHTTPSCORS ?

StopMailing API vs alternatives

StopMailing API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
StopMailing	No	Yes	Yes	100%	738 ms	Not rated
Kickbox	No	Yes	Yes	100%	754 ms	Not rated
mail.gw	No	Yes	Yes	100%	602 ms	Not rated
mail.tm	No	Yes	Yes	100%	625 ms	Not rated
Vetto	No	Yes	Yes	100%	1170 ms	Not rated
EEmail Validator by LifeStep	No	Yes	Yes	100%	1006 ms	Not rated
MailSenpai DNS Check	No	Yes	Yes	100%	1464 ms	Not rated
Disify	No	Yes	Yes	100%	2586 ms	Not rated
Cloudmersive Validate	Required	Yes	Yes	100%	174 ms	Not rated

See also: best Email APIs · all Email APIs