# API-first email architecture: Klaviyo and beehiiv field notes
Canonical: https://marketinginbox.dev/fr/posts/gen-289-api-first-klaviyo

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

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