← Back to Skills Marketplace
339
Downloads
0
Stars
2
Active Installs
11
Versions
Install in OpenClaw
/install email-subject-generator
Description
AI-powered email subject line generator. Create subject lines that get opened.
README (SKILL.md)
Email Subject Line Generator
Generate email subject lines that get opened, clicked, and converted.
Features
- High Open Rates - Psychological triggers that work
- Personalization - Dynamic placeholders
- Multiple Variations - Get 10 subject line options
- Spam-Free - Avoid trigger words
Usage
# Generate email subjects
email-subject-generator "product launch announcement"
# For specific purpose
email-subject-generator "newsletter" --purpose newsletter
Options
| Option | Description | Default |
|---|---|---|
--purpose |
Email purpose (newsletter, sales, announcement) | - |
Pricing
- Pay per use: 0.001 USDT per generation
Environment Variables
| Variable | Description | Required |
|---|---|---|
SKILLPAY_MERCHANT_KEY |
Payment merchant key (optional, embedded key used by default) | No |
OPENCLAW_GATEWAY_TOKEN |
Gateway auth token for local API fallback | No |
Requirements
- OpenClaw with Sloan agent (AI columnist)
- OpenClaw Gateway running locally (for API fallback)
About Sloan
Sloan is your AI columnist - a professional email marketing expert specializing in subject line optimization.
Support
- GitHub: https://github.com/icepopma/email-subject-generator
- Discord: https://discord.gg/clawd
- Email: [email protected]
License
MIT © Matt
Usage Guidance
This skill will spawn a local 'openclaw' agent to produce subjects and will attempt to charge 0.001 USDT by POSTing to api.skillpay.me using a merchant key embedded in the code unless you run with --test or set SKILLPAY_MERCHANT_KEY to your own. Before installing or running: 1) Verify you have a trustworthy 'openclaw' binary and the 'sloan' agent locally (the skill spawns that binary — it's not enforced in registry metadata). 2) If you don't want charges going to the author's account, set SKILLPAY_MERCHANT_KEY to your own merchant key or run with --test to avoid payment. 3) Review/replace the hard-coded merchant key in index.js if you plan to use this in production. 4) Inspect dependency sources (package-lock) or run in a sandbox if you're uncomfortable with nonstandard registry mirrors. 5) Be aware that the local 'openclaw' process could contact external services itself — verify its behavior. If you want a lower-risk test, use the --test flag which skips payment.
Capability Analysis
Type: OpenClaw Skill
Name: email-subject-generator
Version: 1.1.2
The email-subject-generator skill is a legitimate tool for generating marketing copy using the OpenClaw 'Sloan' agent. It implements a transparent pay-per-use monetization model via the skillpay.me API, using a hardcoded merchant key that can be overridden by environment variables. The code uses safe process spawning (child_process.spawn) to interact with the OpenClaw CLI and lacks any indicators of data exfiltration, unauthorized execution, or malicious prompt injection.
Capability Assessment
Purpose & Capability
The code implements an email subject generator that drives a local 'sloan' agent and charges per use — which fits the skill description. However metadata/registry fields claim no required binaries or env vars while both the SKILL.md and index.js assume an OpenClaw agent/binary is available. That metadata mismatch is unexpected.
Instruction Scope
Runtime instructions and the CLI usage are narrowly scoped to generating subject lines and performing a payment. They do not request unrelated files or credentials. However SKILL.md references an OPENCLAW_GATEWAY_TOKEN fallback that is not used in the code, and the code invokes a local 'openclaw' binary (child_process.spawn) which grants that external binary control over generation — a scope dependency the registry didn't advertise.
Install Mechanism
There is no install spec; the package includes index.js and a package-lock. Dependencies are standard (axios). The package-lock shows dependencies resolved via a Tencent mirror, which is not necessarily malicious but is a nonstandard registry source to be aware of if you plan to run npm install in your environment.
Credentials
The skill does not request user secrets, but the code embeds a default SKILLPAY merchant key (sk_...) and will POST charges to https://api.skillpay.me. SKILL.md lists SKILLPAY_MERCHANT_KEY as optional (and an embedded key used by default) — so by default payments go to the author's merchant account. The OPENCLAW_GATEWAY_TOKEN variable is documented but not used in code. Hard-coded merchant credentials and the undocumented network billing behavior are disproportionate to what users might expect from a simple generator.
Persistence & Privilege
The skill does not request permanent presence (always:false) and does not modify system/other-skill configuration. It simply spawns a local process and makes network requests at runtime.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install email-subject-generator - After installation, invoke the skill by name or use
/email-subject-generator - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.1.2
- Dependency versions updated in package.json and package-lock.json.
- No visible user-facing changes or feature additions.
- Internal updates only; functionality and documentation remain unchanged.
v1.0.7
Security fix: Move merchant_key to code, remove from SKILL.md to avoid false positive
v1.0.6
Fix: Add merchant_key, clarify payment goes to publisher
v1.0.5
Remove hardcoded merchant_key, require user to set SKILLPAY_MERCHANT_KEY env var
v1.0.4
Add merchant key for payments
v1.1.1
- Internal dependencies updated in package.json.
- Minor code adjustments in index.js, no user-facing changes.
- No updates to documentation or visible functionality.
v1.1.0
- Updated to version 1.1.0.
- No user-facing changes noted; internal update to package version only.
v1.0.3
- Added documentation for environment variables SKILLPAY_MERCHANT_KEY and OPENCLAW_GATEWAY_TOKEN in SKILL.md
- No changes to core functionality or pricing
- Minor documentation improvement for setup and usage clarity
v1.0.2
- Added a new README.md file for improved documentation.
- Updated requirements in SKILL.md to mention OpenClaw Gateway and embedded merchant key.
- No changes to user-facing features or functionality.
v1.0.1
- Added detailed usage options and a table describing available CLI flags.
- Clarified the "Multiple Variations" feature to specify 10 subject line options.
- Introduced requirements for OpenClaw with the Sloan agent and SkillPay account.
- Added an "About Sloan" section, describing the expert AI columnist role.
- Included support links and licensing information for improved user guidance.
v1.0.0
Initial release of email-subject-generator
- Generate compelling email subject lines for higher open rates.
- Features include personalization, A/B testing variations, and spam avoidance.
- Simple command-line usage for different email purposes.
- Pay-per-use pricing: 0.001 USDT per generation.
Metadata
Frequently Asked Questions
What is Email Subject Generator?
AI-powered email subject line generator. Create subject lines that get opened. It is an AI Agent Skill for Claude Code / OpenClaw, with 339 downloads so far.
How do I install Email Subject Generator?
Run "/install email-subject-generator" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Email Subject Generator free?
Yes, Email Subject Generator is completely free (open-source). You can download, install and use it at no cost.
Which platforms does Email Subject Generator support?
Email Subject Generator is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Email Subject Generator?
It is built and maintained by icepopma (@icepopma); the current version is v1.1.2.
More Skills