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resend-email

Send emails using Resend API. Use when the user needs to send emails without configuring SMTP servers. Supports text and HTML emails, multiple recipients, CC/BCC, and bulk sending. Ideal for notifications, alerts, newsletters, and automated email workflows.

skill-install — Terminal

Install via CLI (Recommended)

clawhub install openclaw/skills/skills/aprilvkuo/resend-email-sender
Or

Resend Email Sender

Send emails via Resend API - no SMTP configuration needed.

Quick Start

1. Configure

Set environment variables in .env:

RESEND_API_KEY=your_resend_api_key
[email protected]  # Optional, defaults to Resend test domain

Get API key at https://resend.com

2. Send Email

openclaw run resend-email \
  --to="[email protected]" \
  --subject="Hello" \
  --text="Plain text message"

Usage

Basic Text Email

openclaw run resend-email \
  --to="[email protected]" \
  --subject="Notification" \
  --text="Your task is complete."

HTML Email

openclaw run resend-email \
  --to="[email protected]" \
  --subject="Welcome" \
  --html="<h1>Welcome!</h1><p>Thanks for joining.</p>"

Multiple Recipients

openclaw run resend-email \
  --to="[email protected],[email protected],[email protected]" \
  --subject="Team Update" \
  --text="Meeting at 3 PM."

CC and BCC

openclaw run resend-email \
  --to="[email protected]" \
  --cc="[email protected]" \
  --bcc="[email protected]" \
  --subject="Report" \
  --text="Please find the attached report."

From Agent

When agent needs to send email:

# Use exec to call the skill
exec openclaw run resend-email \
  --to="[email protected]" \
  --subject="Automated Notification" \
  --text="This email was sent automatically by the agent."

Configuration Options

VariableRequiredDefaultDescription
RESEND_API_KEYYes-Your Resend API key
RESEND_FROMNo[email protected]Default sender address

Sender Addresses

Limitations

  • Attachments not supported (Resend API requires base64 encoding)
  • Rate limits apply based on Resend plan
  • Email size limits per Resend documentation

Troubleshooting

"RESEND_API_KEY not configured"

  • Set RESEND_API_KEY in .env file or environment

"Failed to send email: Unauthorized"

  • Check API key is correct and active
  • Verify API key has email sending permission

"Failed to send email: Bad Request"

  • Check recipient email format is valid
  • Verify from address is verified (for custom domains)

Resources

  • scripts/send_email.py - Main email sending script
Read Full Documentation on GitHub

Metadata

Author@aprilvkuo
Stars4473
Views0
Updated2026-05-01
View Author Profile
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Add to Configuration

Paste this into your clawhub.json to enable this plugin.

{
  "plugins": {
    "official-aprilvkuo-resend-email-sender": {
      "enabled": true,
      "auto_update": true
    }
  }
}
Safety NoteClawKit audits metadata but not runtime behavior. Use with caution.