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Send email notifications to users via Mailgun API. Use when scheduled jobs complete, encounter errors, need user input, or have important updates to report. Requires Mailgun credentials configured via credential-activation skill.
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| name | notify-user |
| description | Send email notifications to users via Mailgun API. Use when scheduled jobs complete, encounter errors, need user input, or have important updates to report. Requires Mailgun credentials configured via credential-activation skill. |
| version | 1.0.0 |
| allowed-tools | Bash, Read |
| metadata | {"requires":"credential-activation","credentials":["MAILGUN_API_KEY","MAILGUN_DOMAIN","MAILGUN_REGION","MAILGUN_FROM_EMAIL","NOTIFICATION_EMAIL"]} |
Send email notifications to users when important events occur.
This skill requires Mailgun credentials. Before first use, ensure credentials are configured:
Check if credentials exist:
# These should be set as environment variables
echo "MAILGUN_API_KEY: ${MAILGUN_API_KEY:+configured}"
echo "MAILGUN_DOMAIN: ${MAILGUN_DOMAIN:-not set}"
echo "MAILGUN_REGION: ${MAILGUN_REGION:-US}"
echo "NOTIFICATION_EMAIL: ${NOTIFICATION_EMAIL:-not set}"
If not configured: Use the credential-activation skill to guide the user through setup.
| Variable | Description | Example |
|---|---|---|
MAILGUN_API_KEY | Mailgun private API key | key-abc123... |
MAILGUN_DOMAIN | Verified sending domain | mail.teamday.ai |
MAILGUN_REGION | API region: US or EU | US |
MAILGUN_FROM_EMAIL | Sender email address | agent@mail.teamday.ai |
NOTIFICATION_EMAIL | Default recipient | user@example.com |
| Region | Endpoint |
|---|---|
| US (default) | https://api.mailgun.net/v3/{domain}/messages |
| EU | https://api.eu.mailgun.net/v3/{domain}/messages |
# Determine API endpoint based on region
if [ "$MAILGUN_REGION" = "EU" ]; then
MAILGUN_API="https://api.eu.mailgun.net"
else
MAILGUN_API="https://api.mailgun.net"
fi
# Send notification
curl -s --user "api:${MAILGUN_API_KEY}" \
"${MAILGUN_API}/v3/${MAILGUN_DOMAIN}/messages" \
-F from="${MAILGUN_FROM_EMAIL:-Agent <agent@${MAILGUN_DOMAIN}>}" \
-F to="${NOTIFICATION_EMAIL}" \
-F subject="[TeamDay Agent] Notification" \
-F text="Your notification message here"
if [ "$MAILGUN_REGION" = "EU" ]; then
MAILGUN_API="https://api.eu.mailgun.net"
else
MAILGUN_API="https://api.mailgun.net"
fi
curl -s --user "api:${MAILGUN_API_KEY}" \
"${MAILGUN_API}/v3/${MAILGUN_DOMAIN}/messages" \
-F from="${MAILGUN_FROM_EMAIL:-Agent <agent@${MAILGUN_DOMAIN}>}" \
-F to="${NOTIFICATION_EMAIL}" \
-F subject="[TeamDay Agent] Important Update" \
-F text="Plain text version of the message" \
--form-string html='<html>
<body style="font-family: system-ui, sans-serif; max-width: 600px; margin: 0 auto; padding: 20px;">
<h1 style="color: #333;">Agent Notification</h1>
<p>Your HTML content here</p>
<hr style="border: none; border-top: 1px solid #eee; margin: 20px 0;">
<p style="color: #666; font-size: 12px;">This is an automated message from your TeamDay agent.</p>
</body>
</html>'
SUBJECT="[TeamDay Agent] Job Completed: ${JOB_NAME}"
MESSAGE="Your scheduled job '${JOB_NAME}' has completed successfully.
Summary:
- Job: ${JOB_NAME}
- Status: Success
- Completed at: $(date -u +"%Y-%m-%d %H:%M:%S UTC")
Results:
${RESULTS_SUMMARY}
This job will continue running on schedule unless you disable it."
SUBJECT="[TeamDay Agent] Objective Achieved: ${JOB_NAME}"
MESSAGE="Great news! Your scheduled job '${JOB_NAME}' has achieved its objective and has been automatically disabled.
Summary:
- Job: ${JOB_NAME}
- Status: Objective Completed
- Final run: $(date -u +"%Y-%m-%d %H:%M:%S UTC")
Final Report:
${FINAL_REPORT}
The job has been disabled. No further runs will occur unless you re-enable it."
SUBJECT="[TeamDay Agent] Action Required: ${JOB_NAME}"
MESSAGE="Your scheduled job '${JOB_NAME}' has encountered an issue and requires your attention.
Summary:
- Job: ${JOB_NAME}
- Status: Blocked
- Issue detected: $(date -u +"%Y-%m-%d %H:%M:%S UTC")
Issue Details:
${ERROR_DESCRIPTION}
Recommended Actions:
${RECOMMENDED_ACTIONS}
The job has been automatically disabled to prevent repeated failures."
SUBJECT="[TeamDay Agent] Progress Update: ${JOB_NAME}"
MESSAGE="Progress update for your scheduled job '${JOB_NAME}'.
Current Status:
- Progress: ${PROGRESS_PERCENT}% complete
- Current phase: ${CURRENT_PHASE}
- Estimated completion: ${ETA}
Recent Activity:
${ACTIVITY_LOG}
The job will continue running on schedule."
#!/bin/bash
# Configuration (from environment)
JOB_NAME="daily-docs-monitor"
TERMINATION_REASON="Objective completed - all documentation changes tracked"
WORK_SUMMARY="
- Monitored Anthropic docs for 30 days
- Detected 5 significant updates
- Created daily summaries in daily-notes/
- Final report saved to reports/anthropic-tracking-final.md
"
# Determine API endpoint
if [ "$MAILGUN_REGION" = "EU" ]; then
MAILGUN_API="https://api.eu.mailgun.net"
else
MAILGUN_API="https://api.mailgun.net"
fi
# Compose and send notification
curl -s --user "api:${MAILGUN_API_KEY}" \
"${MAILGUN_API}/v3/${MAILGUN_DOMAIN}/messages" \
-F from="${MAILGUN_FROM_EMAIL:-Agent <agent@${MAILGUN_DOMAIN}>}" \
-F to="${NOTIFICATION_EMAIL}" \
-F subject="[TeamDay Agent] Job Terminated: ${JOB_NAME}" \
-F text="Your scheduled job '${JOB_NAME}' has been terminated.
Reason: ${TERMINATION_REASON}
Work Summary:
${WORK_SUMMARY}
---
This is an automated message from your TeamDay agent.
Location: $(pwd)
Timestamp: $(date -u +"%Y-%m-%d %H:%M:%S UTC")"
# Check result
if [ $? -eq 0 ]; then
echo "Notification sent successfully"
else
echo "Failed to send notification"
fi
curl -s --user "api:${MAILGUN_API_KEY}" \
"${MAILGUN_API}/v3/${MAILGUN_DOMAIN}/messages" \
-F from="${MAILGUN_FROM_EMAIL}" \
-F to="user1@example.com" \
-F to="user2@example.com" \
-F cc="manager@example.com" \
-F subject="Team Notification" \
-F text="Message to the team"
Always check the response from Mailgun:
RESPONSE=$(curl -s -w "\n%{http_code}" --user "api:${MAILGUN_API_KEY}" \
"${MAILGUN_API}/v3/${MAILGUN_DOMAIN}/messages" \
-F from="${MAILGUN_FROM_EMAIL}" \
-F to="${NOTIFICATION_EMAIL}" \
-F subject="Test" \
-F text="Test message")
HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
BODY=$(echo "$RESPONSE" | sed '$d')
if [ "$HTTP_CODE" -eq 200 ]; then
echo "Email sent successfully"
echo "Response: $BODY"
else
echo "Failed to send email (HTTP $HTTP_CODE)"
echo "Error: $BODY"
fi
| Error | Cause | Solution |
|---|---|---|
| 401 Unauthorized | Invalid API key | Check MAILGUN_API_KEY |
| 400 Bad Request | Invalid domain or parameters | Verify MAILGUN_DOMAIN is configured in Mailgun |
| 403 Forbidden | Domain not verified | Complete domain verification in Mailgun dashboard |
| Sandbox restriction | Recipient not authorized | Add recipient to authorized list (sandbox only) |
When a scheduled job completes or is terminated, use this pattern:
# In your scheduled job's termination logic:
# 1. Disable the job
# (Update .claude/scheduled/job-name.md with enabled: false)
# 2. Send notification
source /path/to/notify-user-template.sh
send_notification "Job Completed" "Your job has finished successfully."
Use the credential-activation skill to configure Mailgun credentials.
Mailgun has sending limits. For high-volume needs, upgrade your Mailgun plan.