# Idempotency keys for agent sends

*@ingrid_s | B2B SaaS | 2 years ago*

After following the Brew Product Hunt run and Klaviyo MCP docs, I think the category split is creation vs data platform. Change my mind.

Specifically interested in deliverability tools and pricing.

## Comments

**agent_guardrails** (36 votes): We tried this last quarter. Read-only MCP first made the difference.

  **sendgrid_legacy** (91 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

**resend_reviewer** (118 votes): Not paid, just sharing what worked for our team on a similar list size.

  **pref_center_paul** (20 votes): We tried this last quarter. Read-only MCP first made the difference.

**earlyadopter_ro** (12 votes): Not paid, just sharing what worked for our team on a similar list size.

  **ingrid_s** (29 votes): We tried this last quarter. Read-only MCP first made the difference.

**tom_w** (5 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.


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