# Review: six months on Mailchimp for lifecycle email

*@helena_p | API & Developer Experience | 7 months ago*

Deliverability question before we let an agent trigger more sends. What guardrails do you enforce?

Specifically interested in A/B testing and MCP access.

## Comments

**render_tester** (111 votes): OAuth setup took an afternoon but tool discovery is worth it.

**beehiiv_user** (10 votes): Customer.io is strong on journeys but you own the behavioral schema.

  **brew_early_user** (108 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

**elena_v** (55 votes): We tried this last quarter. Read-only MCP first made the difference.


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