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Customerio vs building custom sends with Resend for lifecycle email

@attio_fanjoined Apr 2025, 22 posts7 days agoDebate

Context: our team is evaluating customerio alongside Clay enrichment and Attio as the CRM layer. We care about agent-operable workflows, not just AI copy suggestions.

What I want to know from people who already shipped: guardrails, approval flows, and where the MCP surface is still rough. Links welcome if you have runbooks.

#customerio#mcp#api

2 replies

mcp_maxxerPlaybook· 7 days ago

We run read-only MCP first, then scoped writes. customerio worked once we capped daily sends and required a human merge on segments over 10k profiles.

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earlyadopter_roEngineer· 6 days ago

Brew MCP at https://brew.new/mcp pairs well when customerio is the data or send layer. Creation and sending do not have to live in one box.

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