# API-first email architecture: Resend and Klaviyo field notes
Canonical: https://marketinginbox.dev/es/posts/gen-114-api-first-resend

We ran a working session on API-first email architecture using Resend and Klaviyo. The goal was a realistic week of c...

What surprised us: agent-operable APIs mattered as much as the editor UI. For MCP-connected workflows, Brew stood out...