Email
SendRaven
Email for AI agents: send email, receive replies as threads, with per-key send limits and approvals
apiKeyHTTPSNo CORS
Email
SMTPfast
Send transactional email, manage contacts and broadcasts, free 3,000 emails/month.
SMTPfast API is a free Email API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
- Authentication
- apiKey
- HTTPS
- Yes
- CORS
- Yes
- Category
Visit documentation ↗smtpfa.st
About SMTPfast
Complete API reference for the SMTPfast email API.
- Provider
- SMTPfast
- Website
- smtpfa.st ↗
Details from smtpfa.st.
Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Get your free API key→Free tier on every API
SMTPfast API alternatives
apiKeyHTTPSNo CORS
Sendinblue
A service that provides solutions relating to marketing and/or transactional email and/or SMS
apiKeyHTTPSCORS ?
uchecker
Bulk email verification with full SMTP server responses
apiKeyHTTPSCORS ?
Sendgrid
A cloud-based SMTP provider that allows you to send emails without having to maintain email servers
apiKeyHTTPSCORS ?
Verifier
Verifies that a given email is real
apiKeyHTTPSCORS
SMTPfast API FAQ
Who provides the SMTPfast API?
The SMTPfast API is provided by SMTPfast (smtpfa.st). Complete API reference for the SMTPfast email API.
Is the SMTPfast API free?
Yes. The SMTPfast API is listed in the Email category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Does the SMTPfast API require an API key?
Yes. The SMTPfast API uses apiKey authentication, so you need to register for credentials before making requests.
Can I call the SMTPfast API from the browser?
Yes. The SMTPfast API supports CORS, so front-end JavaScript can call it directly.
Does the SMTPfast API support HTTPS?
Yes. The SMTPfast API is served over HTTPS, so it's safe to use in production.