Category
Email APIs
37 APIs, 13 of them with no auth listed. Each one links to its own page with auth, HTTPS, CORS and the official docs.
APIs37
No auth listed35%13 of 37
HTTPS100%
CORS enabled43%
Docs link reachable92%at the last weekly check
Quick starts
No key, HTTPS and CORS, and the docs link answered at the last check: call these from a web page in minutes.
DisifyValidate and detect disposable and temporary email addresses
Email Spam TesterSend a test message and get a spam score, 41 checks with RFC citations and a fix plan
KickboxEmail verification API
mail.gw10 Minute Mail
mail.tmTemporary Email Service
MailSenpai DNS CheckCheck a domain's SPF, DKIM, DMARC and MX records and get what to fix, with the values to publish
All Email APIs
- AGPC Domain CheckCheck a domain's SPF, DKIM, DMARC and MX with a graded shareable reportNo authCORSLink down
Atomic MailEmail for AI agents: programmatic inbox creation and send/receive over JMAPapiKey
Best Temp MailDisposable inboxes for automated email testing, with OTP extractionNo auth
Cloudmersive ValidateValidate email addresses, phone numbers, VAT numbers and domain namesapiKeyCORS
DisbanClassify email domains as disposable, free, alias, testing or parked to block fake signupsapiKey- DisifyValidate and detect disposable and temporary email addressesNo authCORS
DropMailGraphQL API for creating and managing ephemeral e-mail inboxesNo auth- Email Spam TesterSend a test message and get a spam score, 41 checks with RFC citations and a fix planNo authCORS
Email ValidationValidate email addresses for deliverability and spamapiKeyCORS- Email Validator by LifeStepValidate email syntax and MX, detect disposable/role addresses, suggest typo fixesNo authCORS
EmailJSSend emails directly from client-side JavaScript without a backend serverapiKeyCORS- EVAValidate email addressesNo authCORSLink down
Guerrilla MailDisposable temporary Email addressesNo auth
ImprovMXAPI for free email forwarding serviceapiKey
inboxsinkDisposable inboxes for end-to-end tests that wait for the email and extract OTP codesapiKey- KickboxEmail verification APINo authCORS
- Kiprio Email ValidateFree email validation: MX check, disposable detection, syntaxapiKeyCORS
- mail.gw10 Minute MailNo authCORS
- mail.tmTemporary Email ServiceNo authCORS
mailboxlayerEmail address validationapiKey
MailboxValidatorValidate email address to improve deliverabilityapiKey
MailCheck.aiPrevent users to sign up with temporary email addressesNo auth
MailfornetDisposable inboxes for end-to-end signup tests, with long-polling and HMAC-signed webhooksapiKeyCORS- MailRamboVerify email deliverability with a strict yes/no, disposable and catch-all detectionapiKey
- MailSenpai DNS CheckCheck a domain's SPF, DKIM, DMARC and MX records and get what to fix, with the values to publishNo authCORS
MailtrapEmail API and SMTP for sending transactional and bulk emails, with email testing sandbox for safe developmentapiKey- NitrosendSend marketing and transactional email; manage contacts, segments and flowsapiKey
PostStackEU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analyticsapiKey- RankFabrik VerifyValidate email addresses for deliverability, syntax and disposable detectionapiKey
- SendgridA cloud-based SMTP provider that allows you to send emails without having to maintain email serversapiKey
SendinblueA service that provides solutions relating to marketing and/or transactional email and/or SMSapiKey
SendRavenEmail for AI agents: send email, receive replies as threads, with per-key send limits and approvalsapiKey
SMTPfastSend transactional email, manage contacts and broadcasts, free 3,000 emails/monthapiKeyCORS
TempMailGrabDisposable inboxes for email testing with OTP extraction and webhooksapiKey
ucheckerBulk email verification with full SMTP server responsesapiKey- VerifierVerifies that a given email is realapiKeyCORSLink down
Xeramail Temp MailTemp email address REST API for privacy, testing, automation with OTP extractionapiKey