Stripe Projects
fossasia/eventyay
A skill your agent uses when the user wants to provision infrastructure or third-party services using Stripe Projects.
Validate and clean email lists. An agent skill from guia-matthieu/clawfu-skills.
Install Email Validator
$ npx skills add guia-matthieu/clawfu-skills --skill email-validator -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install guia-matthieu/clawfu-skills email-validator --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/email-tools/email-validator .claude/skills/email-validator && rm -rf skills-srcUse ~/.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/
Install the "email-validator" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validator into .claude/skills/email-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "email-validator", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validatorType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add guia-matthieu/clawfu-skills --skill email-validator -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install guia-matthieu/clawfu-skills email-validator --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/email-tools/email-validator .agents/skills/email-validator && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "email-validator" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validator into .agents/skills/email-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "email-validator", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add guia-matthieu/clawfu-skills --skill email-validator -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install guia-matthieu/clawfu-skills email-validator --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/email-tools/email-validator .cursor/skills/email-validator && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "email-validator" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validator into .cursor/skills/email-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "email-validator", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/guia-matthieu/clawfu-skills.git --path skills/email-tools/email-validator--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add guia-matthieu/clawfu-skills --skill email-validator -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install guia-matthieu/clawfu-skills email-validator --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/email-tools/email-validator .gemini/skills/email-validator && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "email-validator" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validator into .gemini/skills/email-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "email-validator", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install guia-matthieu/clawfu-skills email-validatorInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add guia-matthieu/clawfu-skills --skill email-validator -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/email-tools/email-validator .github/skills/email-validator && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "email-validator" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validator into .github/skills/email-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "email-validator", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add guia-matthieu/clawfu-skills --skill email-validator -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install guia-matthieu/clawfu-skills email-validator --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/email-tools/email-validator .opencode/skills/email-validator && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "email-validator" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/email-tools/email-validator into .opencode/skills/email-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "email-validator", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
email-validator- GitHub stars
- 150
- Token cost
- ~393 tokens
- SKILL.md length
- 95 words
- Files
- 3 (incl. scripts)
- Skills in repo
- 28
- Repo updated
- First seen
- Licence
- MIT
At a glance
Validate and clean email lists. An agent skill from guia-matthieu/clawfu-skills.
- : cleaning email lists before campaigns
- SKILL.md covers What Claude Does vs What You…, Dependencies, Commands and Skill Boundaries, plus 1 more section
- Runs Python scripts from its folder; calls python and pip
- Validating signup emails
What it does
Email Validator is an agent skill from guia-matthieu/clawfu-skills. Validate and clean email lists. Use when: cleaning email lists before campaigns; validating signup emails; removing invalid addresses; checking for disposable emails; improving deliverability
Its SKILL.md is about 390 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including scripts (for example `scripts/main.py`).
It sits in Backend & APIs, covering Transactional email. The repository describes itself as: 172 expert marketing skills for AI agents — ClawFu MCP Server. The licence is MIT.
When your agent uses it
- : cleaning email lists before campaigns
- Validating signup emails
- Removing invalid addresses
- Checking for disposable emails
Example prompts
- “/email-validator”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 4108f5c. 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
Ships 2 files in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
pythonpip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Email Validator loads about 393 tokens when it runs. Until then it costs about 52 tokens; SKILL.md has 95 words of instructions outside code blocks.
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); the scripts in this folder are not scanned.
SKILL.md
The full file from guia-matthieu/clawfu-skills at commit 4108f5c, republished under its MIT licence (© guia-matthieu). 95 words, ~393 tokens.
Download SKILL.mdSave it as
.claude/skills/email-validator/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- email-validator
- description
- Validate and clean email lists. Use when: cleaning email lists before campaigns; validating signup emails; removing invalid addresses; checking for disposable emails; improving deliverability
- license
- MIT
- metadata.author
- ClawFu
- metadata.version
- 1.0.0
- metadata.mcp-server
- @clawfu/mcp-skills
Email Validator
Validate email addresses and clean lists to improve deliverability and reduce bounces.
What Claude Does vs What You Decide
| Claude Does | You Decide |
|---|---|
| Structures analysis frameworks | Metric definitions |
| Identifies patterns in data | Business interpretation |
| Creates visualization templates | Dashboard design |
| Suggests optimization areas | Action priorities |
| Calculates statistical measures | Decision thresholds |
Dependencies
pip install email-validator dnspython clickCommands
python scripts/main.py validate email@example.com
python scripts/main.py batch emails.csv --column email --output clean.csv
python scripts/main.py clean emails.txt --remove-disposableSkill Boundaries
What This Skill Does Well
- Structuring data analysis
- Identifying patterns and trends
- Creating visualization frameworks
- Calculating statistical measures
What This Skill Cannot Do
- Access your actual data
- Replace statistical expertise
- Make business decisions
- Guarantee prediction accuracy
Skill Metadata
- Mode: centaur
category: email-tools
dependencies: [email-validator, dnspython]
difficulty: beginner© guia-matthieu, 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 (scripts) in skills/email-tools/email-validator of guia-matthieu/clawfu-skills.
- SKILL.md
- scripts/main.py
- scripts/requirements.txt
Open the folder on GitHubat commit 4108f5c
Compare with similar skills
Email Validator 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Email Validator this skillguia-matthieu/clawfu-skills | 150 | — | ~393 | Automated safety check: Pass | MIT | |
| Stripe Projectsfossasia/eventyay | 1.7k | 5 repos | ~2k | Automated safety check: Notes | Apache-2.0 | |
| WooCommerce Email Editor Developmentwoocommerce/woocommerce | 11k | — | ~893 | Automated safety check: Pass | Custom licence | |
| Himalaya Email CLIPrismer-AI/PrismerCloud | 1.6k | 3 repos | ~2.3k | Automated safety check: Pass | MIT | |
| Email Best Practicesviclafouch/meme-studio | 110 | 7 repos | ~787 | Automated safety check: Pass | None | |
| React Emailviclafouch/meme-studio | 110 | 2 repos | ~3.6k | Automated safety check: Pass | MIT |
Similar skills
WooCommerce Email Editor Development
woocommerce/woocommerce
Sets up a local environment for the WooCommerce block email editor, with a watcher, Mailpit email capture and build and test commands for its PHP and JS packages.
Himalaya Email CLI
Prismer-AI/PrismerCloud
Operates a mailbox from the terminal with the external Himalaya CLI over IMAP, SMTP, Notmuch or Sendmail, separate from any built-in email gateway adapter.
Email Best Practices
viclafouch/meme-studio
A skill your agent uses when building email features, emails going to spam, high bounce rates, setting up SPF/DKIM/DMARC authentication, implementing email capture, ensuring compliance (CAN-SPAM…
React Email
viclafouch/meme-studio
A skill your agent uses when creating HTML email templates with React components - welcome emails, password resets, notifications, order confirmations, newsletters, or transactional emails.
Email Deliverability Audit
growthenginenowoslawski/coldoutboundskills
Diagnostic audit for a running cold email program. An agent skill from growthenginenowoslawski/coldoutboundskills.
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Related
Categories
Questions about Email Validator
What does Email Validator do?
Validate and clean email lists. An agent skill from guia-matthieu/clawfu-skills. Email Validator is an agent skill from guia-matthieu/clawfu-skills. Validate and clean email lists.
When should I use Email Validator?
Email Validator fits situations like: : cleaning email lists before campaigns; validating signup emails; removing invalid addresses; checking for disposable emails.
How do I install Email Validator in Claude Code?
Run `npx skills add guia-matthieu/clawfu-skills --skill email-validator -a claude-code`. Or copy the skill folder (skills/email-tools/email-validator in guia-matthieu/clawfu-skills) into .claude/skills/email-validator in your project. Claude Code loads it when a task matches its description.
How do I install Email Validator in Codex?
Run `npx skills add guia-matthieu/clawfu-skills --skill email-validator -a codex`. Or copy the skill folder (skills/email-tools/email-validator in guia-matthieu/clawfu-skills) into .agents/skills/email-validator in your project. Codex loads it when a task matches its description.
Can I use Email Validator 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 guia-matthieu/clawfu-skills --skill email-validator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/email-validator, .gemini/skills/email-validator, .github/skills/email-validator and .opencode/skills/email-validator in your project.
What does Email Validator need to run?
Going by SKILL.md and its folder, Email Validator needs Python for the scripts in its folder and the command-line tools its instructions call (python and pip). Our summary lists: Python 3.
Does Email Validator access the network?
SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Email Validator 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Email Validator use?
Email Validator is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Email Validator use?
About 393 tokens (SKILL.md is roughly 1.6k 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 Email Validator?
Skills that share tags, products or a category with Email Validator: Stripe Projects (fossasia/eventyay, 1.7k stars), WooCommerce Email Editor Development (woocommerce/woocommerce, 11k stars), Himalaya Email CLI (Prismer-AI/PrismerCloud, 1.6k stars) and Email Best Practices (viclafouch/meme-studio, 110 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Email Validator?
guia-matthieu (a GitHub user) maintains it in guia-matthieu/clawfu-skills, which has 150 GitHub stars. The repository holds 28 skills in this directory. The repository was last updated on October 1, 2026.
Source: guia-matthieu/clawfu-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.