# HubSpot marketing hub gaps: Resend and Klaviyo field notes
Canonical: https://marketinginbox.dev/es/posts/gen-294-hubspot-resend

We ran a working session on HubSpot marketing hub gaps using Resend and Klaviyo. The goal was a realistic week of cam...

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