Resend Email Skill

Name: resend-email
Rating: 92
Author: dbx0

Send emails programmatically using the Resend API via a Python script with a professional HTML template and file attachment support.

Default Recipient: ltononro@gmail.com (if --to is not provided) From: CodeWorks Agent <lucas.tonon@dbx0.lol>

Features

•
Professional HTML Template - All emails are wrapped in a clean, responsive template with:
- •Gradient header with CodeWorks Agent branding
- •Clean white content area with proper typography
- •Footer with copyright and attribution
- •Mobile-responsive design
- •Outlook/MS Office compatibility
•Template can be disabled - Use --no-template to send raw content
•File Attachments - Attach any files (PDFs, images, documents, etc.) using --attachments

Prerequisites

•
Resend API Key - The API key is stored in .claude/skills/resend-email/.env:
code
```
RESEND_API_KEY=re_JWHGALZV_LsD4NMGfdjQVNJrZQb8b2PnU
```
This file is bundled with the skill and will be copied when the skill is attached to an agent.
•
Python dependencies - Install resend and python-dotenv:
bash
```
pip install resend python-dotenv
```

Usage

Run from the agent's repository root:

bash

python .claude/skills/resend-email/scripts/send-email.py --subject="Email Subject" --body="Email body content"

With a custom recipient:

bash

python .claude/skills/resend-email/scripts/send-email.py --to="user@example.com" --subject="Email Subject" --body="Email body content"

With HTML content:

bash

python .claude/skills/resend-email/scripts/send-email.py --subject="Email Subject" --html="<h1>HTML content</h1>"

Without the template (raw content):

bash

python .claude/skills/resend-email/scripts/send-email.py --subject="Email Subject" --body="Plain content" --no-template

With file attachments:

bash

python .claude/skills/resend-email/scripts/send-email.py --subject="Report" --body="Please find attached." --attachments="/path/to/report.pdf"

With multiple attachments:

bash

python .claude/skills/resend-email/scripts/send-email.py --subject="Files" --body="Here are the files." --attachments="/path/to/file1.pdf,/path/to/image.png,/path/to/doc.docx"

Arguments

Argument	Required	Description
`--to`	No	Recipient email address (default: ltononro@gmail.com)
`--subject`	Yes	Email subject line
`--body`	No*	Plain text email body (converted to HTML)
`--html`	No*	HTML email body for rich formatting
`--no-template`	No	Skip the HTML template wrapper and send raw content
`--attachments`	No	Comma-separated list of file paths to attach

*Must provide either --body or --html

Exit Codes

Code	Meaning
0	Email sent successfully
1	Error (missing API key, API error)

Examples

bash

# Simple text email with template (to default recipient)
python .claude/skills/resend-email/scripts/send-email.py --subject="Hello" --body="This is a test email."

# Email to custom recipient
python .claude/skills/resend-email/scripts/send-email.py --to="user@example.com" --subject="Hello" --body="This is a test email."

# HTML newsletter with template
python .claude/skills/resend-email/scripts/send-email.py --subject="Weekly Update" --html="<h1>This Week</h1><ul><li>Item 1</li><li>Item 2</li></ul>"

# Raw HTML without template
python .claude/skills/resend-email/scripts/send-email.py --subject="Custom Email" --html="<html><body>Custom HTML</body></html>" --no-template

# Multi-line body
python .claude/skills/resend-email/scripts/send-email.py --subject="Report" --body="Line 1
Line 2
Line 3"

# Email with single attachment
python .claude/skills/resend-email/scripts/send-email.py --subject="Invoice" --body="Please find your invoice attached." --attachments="/tmp/invoice.pdf"

# Email with multiple attachments
python .claude/skills/resend-email/scripts/send-email.py --subject="Project Files" --body="Here are the requested files." --attachments="/tmp/report.pdf,/tmp/chart.png,/tmp/data.xlsx"

# Email with attachment to custom recipient
python .claude/skills/resend-email/scripts/send-email.py --to="client@example.com" --subject="Contract" --body="Please review the attached contract." --attachments="/tmp/contract.pdf"

Template Styling

The HTML template supports the following content elements with built-in styling:

•Headings (h1, h2, h3, h4) - Dark text with proper sizing
•Paragraphs - Gray text with comfortable line height
•Links - Indigo color (#6366f1) with hover underline
•Lists (ul, ol) - Properly spaced items
•Code blocks - Light background with monospace font
•Blockquotes - Indigo left border with light background

Notes

•Default recipient is ltononro@gmail.com (used when --to is not provided)
•From address is CodeWorks Agent <lucas.tonon@dbx0.lol>
•Plain text body is automatically converted to HTML with line breaks
•By default, all emails use the professional HTML template
•Use --no-template to send raw content without the wrapper
•API response includes the email ID for tracking
•The .env file with the API key is located at .claude/skills/resend-email/.env
•Attachments are read from disk and base64 encoded before sending
•Multiple attachments can be specified as a comma-separated list
•Invalid attachment paths are skipped with a warning (email still sends)

Troubleshooting

Issue	Solution
`RESEND_API_KEY not found`	Ensure `.claude/skills/resend-email/.env` file exists with API key
`Invalid API key`	Verify key in Resend dashboard
`Must provide either --body or --html`	Add content argument
`Attachment file not found`	Verify the file path exists and is accessible
`No valid attachments found`	Check that all provided file paths are correct