Resend is the email API for developers: send transactional email via POST https://api.resend.com/emails with Bearer API-key auth (from, to, subject, html/text, react via Node SDK supported). Official docs: https://resend.com/docs, send-email reference: https://resend.com/docs/api-reference/emails/send-email. Pricing: Freemium (free tier 3,000 emails/month, 100/day; paid plans scale limits).
Trust signals
Pricing
FREEMIUM
Auth
API_KEY
CORS
No
Rate limit
Free tier 3,000 emails/month (100/day); higher limits on paid plans
Health
472ms
Trust score
87 (B)
Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Strong candidate; weakest signal is CORS.
Links
- Homepageresend.com
- Documentationresend.com/docs/
- Base URLresend.com/docs/
Integration checklist
- Auth is API_KEY
- No CORS — route calls through your backend.
- Rate limit: Free tier 3,000 emails/month (100/day); higher limits on paid plans