Resend Email Skill | Agent Skills

Resend Email

Send emails using the resend-cli. The CLI authenticates via RESEND_API_KEY environment variable.

Sending Email

resend emails send --json \
  --from "Claude <claude@ehop.me>" \
  --to user@example.com \
  --subject "Hello" \
  --text "Email body here"

Always pass --json to get machine-readable output.

Required Flags

| Flag | Description | |------|-------------| | --from | Sender address (default to Claude <claude@ehop.me>) | | --to | Recipient address(es), repeat flag for multiple | | --subject | Email subject line | | --text or --html or --html-file | Body content (exactly one required) |

Optional Flags

| Flag | Description | |------|-------------| | --html | HTML body as string | | --html-file | Path to an HTML file for the body | | --text | Plain text body | | --cc | CC recipient(s), repeat flag for multiple | | --bcc | BCC recipient(s), repeat flag for multiple | | --reply-to | Reply-to address | | --attachment | File path(s) to attach, repeat flag for multiple | | --scheduled-at | Schedule delivery (ISO 8601, e.g. 2024-12-25T09:00:00Z) | | --headers | Custom headers as key=value pairs | | --tags | Email tags as name=value pairs |

Examples

Simple text email:

resend emails send --json \
  --from "Claude <claude@ehop.me>" \
  --to user@example.com \
  --subject "Quick update" \
  --text "Just a quick note."

HTML email:

resend emails send --json \
  --from "Newsletter <news@ehop.me>" \
  --to user@example.com \
  --subject "Newsletter" \
  --html "<h1>Hello</h1><p>Welcome to our newsletter.</p>"

With attachments:

resend emails send --json \
  --from "Claude <claude@ehop.me>" \
  --to user@example.com \
  --subject "Report attached" \
  --text "Please find the report attached." \
  --attachment /path/to/report.pdf \
  --attachment /path/to/data.csv

Multiple recipients with CC:

resend emails send --json \
  --from "Claude <claude@ehop.me>" \
  --to alice@example.com \
  --to bob@example.com \
  --cc manager@example.com \
  --subject "Team update" \
  --text "Hi team..."

Scheduled email:

resend emails send --json \
  --from "Claude <claude@ehop.me>" \
  --to user@example.com \
  --subject "Reminder" \
  --text "Don't forget!" \
  --scheduled-at "2024-12-25T09:00:00Z"

HTML from file:

resend emails send --json \
  --from "Claude <claude@ehop.me>" \
  --to user@example.com \
  --subject "Report" \
  --html-file ./email.html

Output

Success returns JSON with email ID:

{"id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794"}

Errors exit with code 1 and return:

{"error": {"message": "...", "code": "..."}}

Limits

Sender domain must be verified in Resend dashboard
Max 50 recipients per email
Max 40MB total size including attachments

Agent Skills: Resend Email

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