Resend Expert

Complete Resend email API expertise for transactional emails, marketing broadcasts, and contact management.

Quick Reference

Base URL: https://api.resend.com Auth: Authorization: Bearer $RESEND_API_KEY User's Key: re_Czsz1gQW_Dz4H2a9dH8tTjgteeDCjVujF Verified Domain: sigstack.dev (newsletter: tips@sigstack.dev)

Core Endpoints

Send Single Email

curl -X POST https://api.resend.com/emails \
  -H "Authorization: Bearer re_Czsz1gQW_Dz4H2a9dH8tTjgteeDCjVujF" \
  -H "Content-Type: application/json" \
  -d '{