# agent-ready ESP selection: Customer.io and ActiveCampaign field notes
Canonical: https://marketinginbox.dev/pt-BR/posts/gen-75-agent-ready-customer-io

We ran a working session on agent-ready ESP selection using Customer.io and ActiveCampaign. The goal was a realistic ...

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