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Agent skill

Mailgun

by LeoYeAI in LeoYeAI/openclaw-master-skills

Mailgun API integration with managed OAuth. An agent skill from LeoYeAI/openclaw-master-skills.

MITAuto-check passedBackend & APIs

Install Mailgun

skills CLI
$ npx skills add LeoYeAI/openclaw-master-skills --skill mailgun -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install LeoYeAI/openclaw-master-skills mailgun --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/LeoYeAI/openclaw-master-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/mailgun-api .claude/skills/mailgun && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
mailgun
GitHub stars
2.2k
Token cost
~4.5k tokens
SKILL.md length
785 words
Files
3
Skills in repo
1,235
Repo updated
First seen
Licence
MIT

At a glance

Mailgun API integration with managed OAuth. An agent skill from LeoYeAI/openclaw-master-skills.

  • Works in 3 steps: Sign in or create an account at maton.ai → Go to maton.ai/settings → Copy your API key
  • Users want to send emails
  • SKILL.md covers Quick Start, Base URL, Authentication and Connection Management, plus 3 more sections
  • Calls python and curl; reaches gateway.maton.ai and ctrl.maton.ai; needs MATON_API_KEY

What it does

Mailgun is an agent skill from LeoYeAI/openclaw-master-skills. Mailgun API integration with managed OAuth. Transactional email service for sending, receiving, and tracking emails. Use this skill when users want to send emails, manage domains, routes, templates, mailing lists, or suppressions in Mailgun. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).

Its SKILL.md is about 4.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `_meta.json`). Compatibility notes: Requires network access and valid Maton API key

It sits in Backend & APIs, covering Microservices, Transactional email and Webhooks. The repository describes itself as: 🧠 Curated collection of 1209+ best OpenClaw skills — weekly updated by MyClaw.ai. The licence is MIT.

When your agent uses it

  • Users want to send emails
  • Suppressions in Mailgun

Example prompts

  • “/mailgun”

Requirements

  • Python 3
  • A credential in MATON_API_KEY
  • A credential in YOUR_API_KEY
  • Compatibility (from SKILL.md): Requires network access and valid Maton API key

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Sign in or create an account at maton.ai
  2. Go to maton.ai/settings
  3. Copy your API key

What it can do on your machine

Read from SKILL.md and the folder at commit e5199b5. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • python
    • curl

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • gateway.maton.ai
    • ctrl.maton.ai
    • api.mailgun.net
    • connect.maton.ai

    Also links to:

    • maton.ai
    • documentation.mailgun.com
    • mailgun-docs.redoc.ly
    • postman.com
    • discord.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • MATON_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Requires network access and valid Maton API key

    From compatibility in the SKILL.md frontmatter.

Context cost

Mailgun loads about 4.5k tokens when it runs. Until then it costs about 87 tokens; SKILL.md has 785 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~87
When it runs · the whole SKILL.md, loaded when a task matches
~4.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from LeoYeAI/openclaw-master-skills at commit e5199b5, republished under its MIT licence (© LeoYeAI). 785 words, ~4,507 tokens.

Download SKILL.mdSave it as .claude/skills/mailgun/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
mailgun
description
Mailgun API integration with managed OAuth. Transactional email service for sending, receiving, and tracking emails. Use this skill when users want to send emails, manage domains, routes, templates, mailing lists, or suppressions in Mailgun. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).
compatibility
Requires network access and valid Maton API key
metadata.author
maton
metadata.version
1.0

Mailgun

Access the Mailgun API with managed OAuth authentication. Send transactional emails, manage domains, routes, templates, mailing lists, suppressions, and webhooks.

Quick Start

bash
# List domains
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/mailgun/v3/domains')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://gateway.maton.ai/mailgun/v3/{resource}

Replace {resource} with the actual Mailgun API endpoint path. The gateway proxies requests to api.mailgun.net/v3 (US region) and automatically injects your OAuth token.

Regional Note: Mailgun has US and EU regions. The gateway defaults to US region (api.mailgun.net).

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

bash
export MATON_API_KEY="YOUR_API_KEY"
Getting Your API Key
  1. Sign in or create an account at maton.ai
  2. Go to maton.ai/settings
  3. Copy your API key

Connection Management

Manage your Mailgun OAuth connections at https://ctrl.maton.ai.

List Connections
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections?app=mailgun&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Create Connection
bash
python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'mailgun'}).encode()
req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Get Connection
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

json
{
  "connection": {
    "connection_id": "78b5a036-c621-40c2-b74b-276195735af2",
    "status": "ACTIVE",
    "creation_time": "2026-02-12T02:24:16.551210Z",
    "last_updated_time": "2026-02-12T02:25:03.542838Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "mailgun",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Specifying Connection

If you have multiple Mailgun connections, specify which one to use with the Maton-Connection header:

bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/mailgun/v3/domains')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '78b5a036-c621-40c2-b74b-276195735af2')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If omitted, the gateway uses the default (oldest) active connection.

API Reference

Important: Mailgun API uses application/x-www-form-urlencoded for POST/PUT requests, not JSON.

Domains
List Domains
bash
GET /mailgun/v3/domains

Returns all domains for the account.

Get Domain
bash
GET /mailgun/v3/domains/{domain_name}
Create Domain
bash
POST /mailgun/v3/domains
Content-Type: application/x-www-form-urlencoded

name=example.com&smtp_password=supersecret
Delete Domain
bash
DELETE /mailgun/v3/domains/{domain_name}
Messages
Send Message
bash
POST /mailgun/v3/{domain_name}/messages
Content-Type: application/x-www-form-urlencoded

from=sender@example.com&to=recipient@example.com&subject=Hello&text=Hello World

Parameters:

  • from (required) - Sender email address
  • to (required) - Recipient(s), comma-separated
  • cc - CC recipients
  • bcc - BCC recipients
  • subject (required) - Email subject
  • text - Plain text body
  • html - HTML body
  • template - Name of stored template to use
  • o:tag - Tag for tracking
  • o:tracking - Enable/disable tracking (yes/no)
  • o:tracking-clicks - Enable click tracking
  • o:tracking-opens - Enable open tracking
  • h:X-Custom-Header - Custom headers (prefix with h:)
  • v:custom-var - Custom variables for templates (prefix with v:)
Send MIME Message
bash
POST /mailgun/v3/{domain_name}/messages.mime
Content-Type: multipart/form-data

to=recipient@example.com&message=<MIME content>
Events
List Events
bash
GET /mailgun/v3/{domain_name}/events

Query parameters:

  • begin - Start time (RFC 2822 or Unix timestamp)
  • end - End time
  • ascending - Sort order (yes/no)
  • limit - Results per page (max 300)
  • event - Filter by event type (accepted, delivered, failed, opened, clicked, unsubscribed, complained, stored)
  • from - Filter by sender
  • to - Filter by recipient
  • tags - Filter by tags
Routes

Routes are defined globally per account, not per domain.

List Routes
bash
GET /mailgun/v3/routes

Query parameters:

  • skip - Number of records to skip
  • limit - Number of records to return
Create Route
bash
POST /mailgun/v3/routes
Content-Type: application/x-www-form-urlencoded

priority=0&description=My Route&expression=match_recipient(".*@example.com")&action=forward("https://example.com/webhook")

Parameters:

  • priority - Route priority (lower = higher priority)
  • description - Route description
  • expression - Filter expression (match_recipient, match_header, catch_all)
  • action - Action(s) to take (forward, store, stop)
Get Route
bash
GET /mailgun/v3/routes/{route_id}
Update Route
bash
PUT /mailgun/v3/routes/{route_id}
Content-Type: application/x-www-form-urlencoded

priority=1&description=Updated Route
Delete Route
bash
DELETE /mailgun/v3/routes/{route_id}
Webhooks
List Webhooks
bash
GET /mailgun/v3/domains/{domain_name}/webhooks
Create Webhook
bash
POST /mailgun/v3/domains/{domain_name}/webhooks
Content-Type: application/x-www-form-urlencoded

id=delivered&url=https://example.com/webhook

Webhook types: accepted, delivered, opened, clicked, unsubscribed, complained, permanent_fail, temporary_fail

Get Webhook
bash
GET /mailgun/v3/domains/{domain_name}/webhooks/{webhook_type}
Update Webhook
bash
PUT /mailgun/v3/domains/{domain_name}/webhooks/{webhook_type}
Content-Type: application/x-www-form-urlencoded

url=https://example.com/new-webhook
Delete Webhook
bash
DELETE /mailgun/v3/domains/{domain_name}/webhooks/{webhook_type}
Templates
List Templates
bash
GET /mailgun/v3/{domain_name}/templates
Create Template
bash
POST /mailgun/v3/{domain_name}/templates
Content-Type: application/x-www-form-urlencoded

name=my-template&description=Welcome email&template=<html><body>Hello {{name}}</body></html>
Get Template
bash
GET /mailgun/v3/{domain_name}/templates/{template_name}
Delete Template
bash
DELETE /mailgun/v3/{domain_name}/templates/{template_name}
Mailing Lists
List Mailing Lists
bash
GET /mailgun/v3/lists/pages
Create Mailing List
bash
POST /mailgun/v3/lists
Content-Type: application/x-www-form-urlencoded

address=newsletter@example.com&name=Newsletter&description=Monthly newsletter&access_level=readonly

Access levels: readonly, members, everyone

Get Mailing List
bash
GET /mailgun/v3/lists/{list_address}
Update Mailing List
bash
PUT /mailgun/v3/lists/{list_address}
Content-Type: application/x-www-form-urlencoded

name=Updated Newsletter
Delete Mailing List
bash
DELETE /mailgun/v3/lists/{list_address}
Mailing List Members
List Members
bash
GET /mailgun/v3/lists/{list_address}/members/pages
Add Member
bash
POST /mailgun/v3/lists/{list_address}/members
Content-Type: application/x-www-form-urlencoded

address=member@example.com&name=John Doe&subscribed=yes
Get Member
bash
GET /mailgun/v3/lists/{list_address}/members/{member_address}
Update Member
bash
PUT /mailgun/v3/lists/{list_address}/members/{member_address}
Content-Type: application/x-www-form-urlencoded

name=Jane Doe&subscribed=no
Delete Member
bash
DELETE /mailgun/v3/lists/{list_address}/members/{member_address}
Suppressions
Bounces
bash
# List bounces
GET /mailgun/v3/{domain_name}/bounces

# Add bounce
POST /mailgun/v3/{domain_name}/bounces
Content-Type: application/x-www-form-urlencoded

address=bounced@example.com&code=550&error=Mailbox not found

# Get bounce
GET /mailgun/v3/{domain_name}/bounces/{address}

# Delete bounce
DELETE /mailgun/v3/{domain_name}/bounces/{address}
Unsubscribes
bash
# List unsubscribes
GET /mailgun/v3/{domain_name}/unsubscribes

# Add unsubscribe
POST /mailgun/v3/{domain_name}/unsubscribes
Content-Type: application/x-www-form-urlencoded

address=unsubscribed@example.com&tag=*

# Delete unsubscribe
DELETE /mailgun/v3/{domain_name}/unsubscribes/{address}
Complaints
bash
# List complaints
GET /mailgun/v3/{domain_name}/complaints

# Add complaint
POST /mailgun/v3/{domain_name}/complaints
Content-Type: application/x-www-form-urlencoded

address=complainer@example.com

# Delete complaint
DELETE /mailgun/v3/{domain_name}/complaints/{address}
Whitelists
bash
# List whitelists
GET /mailgun/v3/{domain_name}/whitelists

# Add to whitelist
POST /mailgun/v3/{domain_name}/whitelists
Content-Type: application/x-www-form-urlencoded

address=allowed@example.com

# Delete from whitelist
DELETE /mailgun/v3/{domain_name}/whitelists/{address}
Statistics
Get Stats
bash
GET /mailgun/v3/{domain_name}/stats/total?event=delivered&event=opened

Query parameters:

  • event (required) - Event type(s): accepted, delivered, failed, opened, clicked, unsubscribed, complained
  • start - Start date (RFC 2822 or Unix timestamp)
  • end - End date
  • resolution - Data resolution (hour, day, month)
  • duration - Period to show stats for
Show full SKILL.md (310 more words)Show less
Tags
List Tags
bash
GET /mailgun/v3/{domain_name}/tags
Get Tag
bash
GET /mailgun/v3/{domain_name}/tags/{tag_name}
Delete Tag
bash
DELETE /mailgun/v3/{domain_name}/tags/{tag_name}
IPs
List IPs
bash
GET /mailgun/v3/ips
Get IP
bash
GET /mailgun/v3/ips/{ip_address}
Domain Tracking
Get Tracking Settings
bash
GET /mailgun/v3/domains/{domain_name}/tracking
Update Open Tracking
bash
PUT /mailgun/v3/domains/{domain_name}/tracking/open
Content-Type: application/x-www-form-urlencoded

active=yes
Update Click Tracking
bash
PUT /mailgun/v3/domains/{domain_name}/tracking/click
Content-Type: application/x-www-form-urlencoded

active=yes
Update Unsubscribe Tracking
bash
PUT /mailgun/v3/domains/{domain_name}/tracking/unsubscribe
Content-Type: application/x-www-form-urlencoded

active=yes&html_footer=<a href="%unsubscribe_url%">Unsubscribe</a>
Credentials
List Credentials
bash
GET /mailgun/v3/domains/{domain_name}/credentials
Create Credential
bash
POST /mailgun/v3/domains/{domain_name}/credentials
Content-Type: application/x-www-form-urlencoded

login=alice&password=supersecret
Delete Credential
bash
DELETE /mailgun/v3/domains/{domain_name}/credentials/{login}

Pagination

Mailgun uses cursor-based pagination:

json
{
  "items": [...],
  "paging": {
    "first": "https://api.mailgun.net/v3/.../pages?page=first&limit=100",
    "last": "https://api.mailgun.net/v3/.../pages?page=last&limit=100",
    "next": "https://api.mailgun.net/v3/.../pages?page=next&limit=100",
    "previous": "https://api.mailgun.net/v3/.../pages?page=prev&limit=100"
  }
}

Use limit parameter to control page size (default: 100).

Code Examples

JavaScript - Send Email
javascript
const formData = new URLSearchParams();
formData.append('from', 'sender@example.com');
formData.append('to', 'recipient@example.com');
formData.append('subject', 'Hello');
formData.append('text', 'Hello World!');

const response = await fetch(
  'https://gateway.maton.ai/mailgun/v3/example.com/messages',
  {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`,
      'Content-Type': 'application/x-www-form-urlencoded'
    },
    body: formData.toString()
  }
);
const result = await response.json();
console.log(result);
Python - Send Email
python
import os
import requests

response = requests.post(
    'https://gateway.maton.ai/mailgun/v3/example.com/messages',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
    data={
        'from': 'sender@example.com',
        'to': 'recipient@example.com',
        'subject': 'Hello',
        'text': 'Hello World!'
    }
)
print(response.json())
Python - List Domains
python
import os
import requests

response = requests.get(
    'https://gateway.maton.ai/mailgun/v3/domains',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
)
domains = response.json()
for domain in domains['items']:
    print(f"{domain['name']}: {domain['state']}")
Python - Create Route and Webhook
python
import os
import requests

headers = {'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
domain = 'example.com'

# Create route
route_response = requests.post(
    'https://gateway.maton.ai/mailgun/v3/routes',
    headers=headers,
    data={
        'priority': 0,
        'description': 'Forward to webhook',
        'expression': 'match_recipient("support@example.com")',
        'action': 'forward("https://myapp.com/incoming-email")'
    }
)
print(f"Route created: {route_response.json()}")

# Create webhook
webhook_response = requests.post(
    f'https://gateway.maton.ai/mailgun/v3/domains/{domain}/webhooks',
    headers=headers,
    data={
        'id': 'delivered',
        'url': 'https://myapp.com/webhook/delivered'
    }
)
print(f"Webhook created: {webhook_response.json()}")

Notes

  • Mailgun uses application/x-www-form-urlencoded for POST/PUT requests, not JSON
  • Domain names must be included in most endpoint paths
  • Routes are global (per account), not per domain
  • Sandbox domains require authorized recipients for sending
  • Dates are returned in RFC 2822 format
  • Event logs are stored for at least 3 days
  • Stats require at least one event parameter
  • Templates use Handlebars syntax by default
  • IMPORTANT: When using curl commands, use curl -g when URLs contain brackets to disable glob parsing
  • IMPORTANT: When piping curl output to jq, environment variables may not expand correctly. Use Python examples instead.

Rate Limits

OperationLimit
SendingVaries by plan
API callsNo hard limit, but excessive requests may be throttled

When rate limited, implement exponential backoff for retries.

Error Handling

StatusMeaning
400Bad request or missing Mailgun connection
401Invalid or missing Maton API key
403Forbidden (e.g., sandbox domain restrictions)
404Resource not found
429Rate limited
4xx/5xxPassthrough error from Mailgun API
Troubleshooting: API Key Issues
  1. Check that the MATON_API_KEY environment variable is set:
bash
echo $MATON_API_KEY
  1. Verify the API key is valid by listing connections:
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Troubleshooting: Invalid App Name
  1. Ensure your URL path starts with mailgun. For example:
  • Correct: https://gateway.maton.ai/mailgun/v3/domains
  • Incorrect: https://gateway.maton.ai/v3/domains
Troubleshooting: Sandbox Domain Restrictions

Sandbox domains can only send to authorized recipients. To send emails:

  1. Upgrade to a paid plan, or
  2. Add recipient addresses to authorized recipients in the Mailgun dashboard

Resources

© LeoYeAI, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files in skills/mailgun-api of LeoYeAI/openclaw-master-skills.

  • SKILL.md
  • LICENSE.txt
  • _meta.json

Open the folder on GitHubat commit e5199b5

Compare with similar skills

Mailgun next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Mailgun compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
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Categories

Questions about Mailgun

What does Mailgun do?

Mailgun API integration with managed OAuth. An agent skill from LeoYeAI/openclaw-master-skills. Mailgun is an agent skill from LeoYeAI/openclaw-master-skills. Mailgun API integration with managed OAuth.

When should I use Mailgun?

Mailgun fits situations like: users want to send emails; suppressions in Mailgun.

How do I install Mailgun in Claude Code?

Run `npx skills add LeoYeAI/openclaw-master-skills --skill mailgun -a claude-code`. Or copy the skill folder (skills/mailgun-api in LeoYeAI/openclaw-master-skills) into .claude/skills/mailgun in your project. Claude Code loads it when a task matches its description.

How do I install Mailgun in Codex?

Run `npx skills add LeoYeAI/openclaw-master-skills --skill mailgun -a codex`. Or copy the skill folder (skills/mailgun-api in LeoYeAI/openclaw-master-skills) into .agents/skills/mailgun in your project. Codex loads it when a task matches its description.

Can I use Mailgun in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add LeoYeAI/openclaw-master-skills --skill mailgun -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mailgun, .gemini/skills/mailgun, .github/skills/mailgun and .opencode/skills/mailgun in your project.

What does Mailgun need to run?

Going by SKILL.md and its folder, Mailgun needs the command-line tools its instructions call (python and curl) and credentials named MATON_API_KEY. Our summary lists: Python 3; A credential in MATON_API_KEY; A credential in YOUR_API_KEY. Compatibility (from SKILL.md): Requires network access and valid Maton API key.

Does Mailgun access the network?

SKILL.md names 9 domains. In commands or code: gateway.maton.ai, ctrl.maton.ai, api.mailgun.net and connect.maton.ai; the agent is likely to contact these when it follows the instructions. As links in the text: maton.ai, documentation.mailgun.com, mailgun-docs.redoc.ly, postman.com and discord.com. This is read from the text; nothing was executed.

Is Mailgun safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Mailgun use?

Mailgun is published under the MIT licence (from the LICENSE file in the skill folder). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Mailgun use?

About 4.5k tokens (SKILL.md is roughly 18k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Mailgun?

Skills that share tags, products or a category with Mailgun: Calendly (CraftOS-dev/CraftBot, 392 stars), Clickup (CraftOS-dev/CraftBot, 392 stars), Asana (CraftOS-dev/CraftBot, 392 stars) and Fathom (CraftOS-dev/CraftBot, 392 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Mailgun?

LeoYeAI (a GitHub user) maintains it in LeoYeAI/openclaw-master-skills, which has 2,161 GitHub stars. The repository holds 1,235 skills in this directory. The repository was last updated on July 20, 2026.

Source: LeoYeAI/openclaw-master-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.