How do I install the Mailgun skill?

Run npx skillmds@latest add kbarbel640-del/mailgun in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Mailgun safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts, makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Mailgun?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Mailgun free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Mailgun?

kbarbel640-del (@kbarbel640-del) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Mailgun by kbarbel640-del — Agent Skill

Name: Mailgun
Rating: 4.666666666666667 (3 reviews)
Author: kbarbel640-del

Mailgun

Send emails via Mailgun API. Use when the user needs to send emails programmatically, such as newsletters, notifications, alerts, or automated reports. Requires MAILGUN_API_KEY and MAILGUN_DOMAIN environment variables to be configured.

kbarbel640-del Updated Sep 8, 2026 1 repo stars

File contents

Mailgun Email Sender

Send emails programmatically using Mailgun's HTTP API.

Prerequisites

Configure the following environment variables in ~/.zshrc or ~/.bash_profile:

export MAILGUN_API_KEY="key-xxxxx"      # Your Mailgun private API key
export MAILGUN_DOMAIN="mg.yourdomain.com"  # Your Mailgun domain
export MAILGUN_FROM="Sender <noreply@mg.yourdomain.com>"  # Default sender
export MAILGUN_DEFAULT_TO="you@email.com"  # Default recipient (optional)

Then reload your shell configuration:

source ~/.zshrc

Usage

Send a simple email

mailgun/scripts/send_email.sh "Subject" "Email body text"

Send to a specific recipient

mailgun/scripts/send_email.sh "Newsletter" "Content here" "recipient@email.com"

Send with custom sender

mailgun/scripts/send_email.sh "Alert" "System down" "admin@company.com" "alerts@company.com"

Features

Simple command-line interface
Uses environment variables for configuration
Supports custom sender and recipient
Returns success/error status codes
Works with HTML content (pass HTML in body parameter)

Common Use Cases

Daily/weekly newsletters
System alerts and notifications
Automated reports
Confirmation emails
Scheduled reminders

Troubleshooting

Error: MAILGUN_API_KEY and MAILGUN_DOMAIN must be set → Configure environment variables as shown in Prerequisites

Error: 401 Unauthorized → Check that your API key is correct and active

Error: 404 Not Found → Verify your MAILGUN_DOMAIN is correct

References

Mailgun Documentation: https://documentation.mailgun.com/
API Reference: See references/api.md

---name: mailgundescription: Send emails via Mailgun API. Use when the user needs to send emails programmatically, such as newsletters, notifications, alerts, or automated reports. Requires MAILGUN_API_KEY and MAILGUN_DOMAIN environment variables to be configured.---# Mailgun Email SenderSend emails programmatically using Mailgun's HTTP API.## PrerequisitesConfigure the following environment variables in `~/.zshrc` or `~/.bash_profile`:```bashexport MAILGUN_API_KEY="key-xxxxx" # Your Mailgun private API keyexport MAILGUN_DOMAIN="mg.yourdomain.com" # Your Mailgun domainexport MAILGUN_FROM="Sender <noreply@mg.yourdomain.com>" # Default senderexport MAILGUN_DEFAULT_TO="you@email.com" # Default recipient (optional)```Then reload your shell configuration:```bashsource ~/.zshrc```## Usage### Send a simple email```bashmailgun/scripts/send_email.sh "Subject" "Email body text"```### Send to a specific recipient```bashmailgun/scripts/send_email.sh "Newsletter" "Content here" "recipient@email.com"```### Send with custom sender```bashmailgun/scripts/send_email.sh "Alert" "System down" "admin@company.com" "alerts@company.com"```## Features- Simple command-line interface- Uses environment variables for configuration- Supports custom sender and recipient- Returns success/error status codes- Works with HTML content (pass HTML in body parameter)## Common Use Cases- Daily/weekly newsletters- System alerts and notifications- Automated reports- Confirmation emails- Scheduled reminders## Troubleshooting**Error: MAILGUN_API_KEY and MAILGUN_DOMAIN must be set**→ Configure environment variables as shown in Prerequisites**Error: 401 Unauthorized**→ Check that your API key is correct and active**Error: 404 Not Found**→ Verify your MAILGUN_DOMAIN is correct## References- Mailgun Documentation: https://documentation.mailgun.com/- API Reference: See [references/api.md](references/api.md)

Frequently asked questions