Postmark API

Email · Operational · 30d uptime 100%
Homepage

Send transactional and marketing emails and get them to the inbox on time, every time. Postmark is a fast and reliable email delivery service for developers.

Trust signals

Pricing
PAID
Auth
API_KEY
CORS
No
Rate limit
250 sends/hour server limit default
Health
370ms
Trust score
90 (A)

Last checked Sep 4, 2026 · uptime 24h 100% / 7d 100% / 30d 100%

Excellent production-readiness signals.

Links

Integration checklist

  • Auth is API_KEY— no credit card required
  • No CORS — route calls through your backend.
  • Rate limit: 250 sends/hour server limit default
More email APIs
Postmark API API — pricing, auth, CORS & health | Reqistry