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Public APIs · by APILayerData from public-apis (MIT)
  1. Home
  2. /Categories
  3. /Email

Free Email APIs

37 free public Email APIs for developers. 37 support HTTPS, 16 allow CORS from the browser and 13 need no API key.

APILayerOne account · one API key
Get API key→

Showing 37 of 37 APIs

A

AGPC Domain Check

Check a domain's SPF, DKIM, DMARC and MX with a graded shareable report

No authHTTPSCORS
Atomic Mail logo

Atomic Mail

Email for AI agents: programmatic inbox creation and send/receive over JMAP

apiKeyHTTPSCORS ?
Best Temp Mail logo

Best Temp Mail

Disposable inboxes for automated email testing, with OTP extraction

No authHTTPSNo CORS
Cloudmersive Validate logo

Cloudmersive Validate

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

apiKeyHTTPSCORS
Disban logo

Disban

Classify email domains as disposable, free, alias, testing or parked to block fake signups

apiKeyHTTPSNo CORS
Disify logo

Disify

Validate and detect disposable and temporary email addresses

No authHTTPSCORS
DropMail logo

DropMail

GraphQL API for creating and managing ephemeral e-mail inboxes

No authHTTPSCORS ?
Email Spam Tester logo

Email Spam Tester

Send a test message and get a spam score, 41 checks with RFC citations and a fix plan

No authHTTPSCORS
Email Validation logo

Email Validation

Validate email addresses for deliverability and spam

apiKeyHTTPSCORS
E

Email Validator by LifeStep

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

No authHTTPSCORS
EmailJS logo

EmailJS

Send emails directly from client-side JavaScript without a backend server

apiKeyHTTPSCORS
E

EVA

Validate email addresses

No authHTTPSCORS
Guerrilla Mail logo

Guerrilla Mail

Disposable temporary Email addresses

No authHTTPSCORS ?
ImprovMX logo

ImprovMX

API for free email forwarding service

apiKeyHTTPSCORS ?
inboxsink logo

inboxsink

Disposable inboxes for end-to-end tests that wait for the email and extract OTP codes

apiKeyHTTPSNo CORS
Kickbox logo

Kickbox

Email verification API

No authHTTPSCORS
K

Kiprio Email Validate

Free email validation: MX check, disposable detection, syntax

apiKeyHTTPSCORS
mail.gw logo

mail.gw

10 Minute Mail

No authHTTPSCORS
mail.tm logo

mail.tm

Temporary Email Service

No authHTTPSCORS
mailboxlayer logo

mailboxlayer

Email address validation

apiKeyHTTPSCORS ?
MailboxValidator logo

MailboxValidator

Validate email address to improve deliverability

apiKeyHTTPSCORS ?
MailCheck.ai logo

MailCheck.ai

Prevent users to sign up with temporary email addresses

No authHTTPSCORS ?
Mailfornet logo

Mailfornet

Disposable inboxes for end-to-end signup tests, with long-polling and HMAC-signed webhooks

apiKeyHTTPSCORS
M

MailRambo

Verify email deliverability with a strict yes/no, disposable and catch-all detection

apiKeyHTTPSNo CORS
MailSenpai DNS Check logo

MailSenpai DNS Check

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

No authHTTPSCORS
Mailtrap logo

Mailtrap

Email API and SMTP for sending transactional and bulk emails, with email testing sandbox for safe development

apiKeyHTTPSCORS ?
Nitrosend logo

Nitrosend

Send marketing and transactional email; manage contacts, segments and flows

apiKeyHTTPSNo CORS
PostStack logo

PostStack

EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics

apiKeyHTTPSNo CORS
RankFabrik Verify logo

RankFabrik Verify

Validate email addresses for deliverability, syntax and disposable detection

apiKeyHTTPSCORS ?
Sendgrid logo

Sendgrid

A cloud-based SMTP provider that allows you to send emails without having to maintain email servers

apiKeyHTTPSCORS ?
Sendinblue logo

Sendinblue

A service that provides solutions relating to marketing and/or transactional email and/or SMS

apiKeyHTTPSCORS ?
SendRaven logo

SendRaven

Email for AI agents: send email, receive replies as threads, with per-key send limits and approvals

apiKeyHTTPSNo CORS
SMTPfast logo

SMTPfast

Send transactional email, manage contacts and broadcasts, free 3,000 emails/month

apiKeyHTTPSCORS
TempMailGrab logo

TempMailGrab

Disposable inboxes for email testing with OTP extraction and webhooks

apiKeyHTTPSNo CORS
U

uchecker

Bulk email verification with full SMTP server responses

apiKeyHTTPSCORS ?
V

Verifier

Verifies that a given email is real

apiKeyHTTPSCORS
Xeramail Temp Mail logo

Xeramail Temp Mail

Temp email address REST API for privacy, testing, automation with OTP extraction

apiKeyHTTPSNo CORS

Email API FAQ

How many free Email APIs are there?

There are 37 free public Email APIs in the directory. 37 support HTTPS, 16 are confirmed to allow CORS and 13 need no API key.

Which Email APIs work without an API key?

13 Email APIs need no authentication, including AGPC Domain Check, Best Temp Mail, Disify and DropMail. You can call them straight away without signing up.

Which Email APIs can I call from the browser?

APIs with CORS enabled can be called directly from front-end JavaScript. In Email, that includes AGPC Domain Check, Cloudmersive Validate, Disify and Email Spam Tester.