Transactional Email skills for Claude Code and Codex
Skills for sending email from code, published by Resend, Mailtrap, Courier, AWS and Cloudflare: sending APIs, React Email templates, domain setup with SPF, DKIM and DMARC, inbound email for agents and template migration between providers. They help an agent ship email that reaches the inbox.
Highest-scoring transactional email skills in the October 22, 2026 snapshot: agent-email-inbox from resend/resend-skills (86/100), converting-email-templates from mailtrap/mailtrap-skills (85/100) and courier from trycourier/courier-skills (83/100). Scores come from the Suede Skill Check.
- 11 listed skills
- 5 repositories
- 9 with full pages
11 from official publishers. 1 bundle scripts. 7 connect to an outside service. Listed in Developer Tools and Frameworks (8), AI Agents and LLM Engineering (1), Productivity and Knowledge Work (1), DevOps and Cloud (1).
All 11 transactional email skills
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| Skill | Repository | What it does |
|---|---|---|
| agent-email-inbox 86/100 · B | resend/resend-skills | Guides building email-triggered systems like AI agent inboxes, using sender allowlists, content filtering, and sandboxed processing to keep untrusted email from controlling the system. |
| converting-email-templates 85/100 · B | mailtrap/mailtrap-skills | Converts email templates from providers such as SendGrid, Mailgun, Postmark, and Amazon SES into Mailtrap-compatible Handlebars syntax, singly or in bulk. |
| courier 83/100 · B | trycourier/courier-skills | Guides building notifications with Courier across email, SMS, push, in-app inbox, Slack, Teams, and WhatsApp, including templates, translations, journeys, routing, and MCP. |
| email-best-practices 80/100 · B | resend/resend-skills | Guides email feature work, including spam and bounce problems, SPF/DKIM/DMARC setup, compliance, webhooks, retry logic, accessibility, and transactional versus marketing email. |
| resend 84/100 · B | resend/resend-skills | Guides work with the Resend email API, including sending transactional emails, inbound webhooks, templates, delivery tracking, domains, contacts, broadcasts, and API keys. |
| resend-cli 83/100 · B | resend/resend-skills | Operates the Resend platform from the terminal with the resend CLI, covering sending emails, domains, contacts, broadcasts, templates, webhooks, API keys, automations, and events. |
| sending-emails 80/100 · B | mailtrap/mailtrap-skills | Guides integrating, configuring, and troubleshooting Mailtrap live email sending through its Email API or SMTP when wiring outbound mail from an application. |
| setting-up-sending-domain 80/100 · B | mailtrap/mailtrap-skills | Guides adding and verifying a Mailtrap sending domain, including DNS propagation issues, registrar or DNS provider steps, compliance after verification, and click tracking. |
| using-email-templates 80/100 · B | mailtrap/mailtrap-skills | Guides creating and sending Mailtrap-hosted email templates with Handlebars personalization, template UUIDs in API payloads, and debugging variables and previews. |
| amazon-ses 80/100 · B | aws/agent-toolkit-for-aws | Guides Amazon SES onboarding for domain-based email sending. Covers identity configuration, production access, an optional first test send, and… |
| cloudflare-email-service 71/100 · C | cloudflare/skills | Implement or troubleshoot Cloudflare Email Sending and Email Routing integrations and their delivery configuration. |
How to choose transactional email skills
Pick the skill for your provider; each follows that provider's API and CLI. All need an API key read from your environment.
email-best-practices from Resend covers deliverability and compliance and applies whichever provider you use.
For marketing sequences and newsletters rather than app email, see the Email topic in Marketing.
Ranked transactional email shortlists
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