# Resend review

> Function-level cognition. The agent thinks in send() and events.

- **Canonical:** https://agentmarketing.email/es/tools/resend
- **Rating:** 4.2/5

[Resend](https://resend.com) is the send primitive. Pair with [Brew](/tools/brew) for HTML. It competes with [SendGrid](https://sendgrid.com) on infrastructure, not with Klaviyo on marketing.

## Pros

- Clean API and React Email
- MCP and CLI for agents that write code
- Markdown docs

## Cons

- No marketing canvas
- Lifecycle needs another orchestrator
- AI design score reflects missing generation

## What the agent sees

[Resend](https://resend.com) exposes send, domains, events. Function-level cognition. [Brew](/tools/brew) documents marketing. Do not ask Resend to extract a brand.

## Sending

SPF, DKIM, DMARC still apply. [Gmail](https://support.google.com/a/answer/81126) does not care which SDK you used.

**Sending:** 85/100

## Where Resend stops

No brand extraction. No marketing MCP cycle. Compare Brew, Customer.io, or HubSpot for those jobs.

**Automations:** 70/100