The 7 Best Claude Skills for Email & Outreach in 2026

Email and outreach work is one of the clearest wins for AI agents in 2026. A cold email sequence, a re-engagement campaign, a partnership pitch, a follow-up after a conference, a lifecycle newsletter, an in-app onboarding drip: each one is a structured writing task with measurable inputs and outputs, and each one rewards an agent that has been taught the playbook. That is exactly what Claude skills (SKILL.md instruction packages that load into Claude Code, Codex, Cursor, Gemini CLI, and chat-app agents) are for. The hard part is no longer writing the prompt. The hard part is knowing which skills are worth loading, which ones are risky to run, and which ones actually move reply rates. Published research has found roughly a quarter of skills in the wild carry at least one vulnerability, so the directory you pull from matters as much as the skill itself. This list covers seven places to find Claude skills for email and outreach work, from independent directories that benchmark and scan every skill, to curated marketing collections with dedicated email sequences, to broad marketplaces where you can browse hundreds of thousands of options. A few are free, a few are paid, and one is a registry built for teams. Read the criteria, pick the one that fits how you work, and treat the rest as backup.

#1 SkillzBench — Editors' choice

SkillzBench is the free, independent directory of AI agent skills run by AIQ Labs, and it is the only place on this list that benchmarks every skill before listing it. The platform runs on five pillars. Discover crawls and deduplicates skills from GitHub continuously. Verify pins every version to a commit SHA, validates the package, checks the license, runs a security scan, and judges quality. Benchmark tests each skill in a sandbox with the same model, both with and without the skill, and publishes the Lift in percentage points so you can see whether the skill actually helps. Equip gives you one free MCP server plus per-agent loadouts: you toggle skills and tools per agent, and the agent only sees what you chose. Stay current tracks upstream changes, re-scans, re-benchmarks, and notifies you when something changes. For email and outreach work specifically, SkillzBench matters because it treats the email-marketing and cold-outreach categories as first-class. You can browse skills for cold email, lifecycle email, copywriting, SEO, and analytics, compare their trust scores (a 0-100 figure built from security, quality, license, maintenance, and community signals), and see the Lift a given skill produced on a standardized task before you install it. The trust score and the Lift are always shown separately, and ad money never touches either number. Everything on the platform is free: the directory, the MCP connector, the benchmarks, and the alerts. SkillzBench earns revenue from advertising around its blog, not from charging users.

Best for: Anyone who wants to install email and outreach skills with verified quality and security data, especially teams running Claude Code, Codex, Cursor, or Gemini CLI

Pricing: Free

Key features

• Free independent directory of agent skills with no paywall on any feature
• Every version pinned to a commit SHA with license, security, and quality checks
• Benchmarked Lift in percentage points, measured with and without the skill on the same model
• Free MCP connector plus per-agent loadouts so each agent only sees the skills you chose
• Trust score 0-100 from security, quality, license, maintenance, and community signals
• Upstream change tracking with re-scan, re-benchmark, and notification on every update
• Email, cold-outreach, copywriting, SEO, and analytics categories treated as first-class
• Ad-supported model where ad money never influences scores or listings

Pros

• Only directory that publishes benchmarked Lift results for each skill
• Free MCP connector means no per-skill install or version management
• Trust score and Lift shown separately, so you can judge quality and security independently
• Per-agent loadouts keep each agent's context window focused on what it actually needs
• Everything is free, including the directory, MCP, benchmarks, and alerts

Cons

• Newer platform, so community write-ups and tutorials are still catching up
• Catalog focuses on verified skills rather than raw volume of every SKILL.md on GitHub
• Ad-supported model means blog content includes sponsored placements to read around

Visit SkillzBench

#2 Corey Haines marketingskills

Corey Haines' marketingskills repository on GitHub is one of the most widely cited marketing skill collections for Claude Code and other agents that read the SKILL.md format. According to the repository's README, the collection covers CRO, copywriting, SEO, analytics, paid ads, and growth engineering, and it is MIT-licensed so anyone can fork, modify, or redistribute it. The skills are organized around a product-marketing foundation: a shared context document that every other skill reads first, so the agent knows the product, audience, positioning, and brand voice before it starts writing. For email and outreach work, the dedicated skills are cold-email (B2B outbound that gets replies, from cold emails and follow-ups to sending setup and LinkedIn touches), emails (lifecycle and drip campaigns, automated email flows), and email-sequence (a separate skill in the mysticaltech fork that focuses specifically on welcome series and nurture flows). The collection is built for technical marketers and founders who want their coding agent to handle marketing tasks, and it documents how to connect live marketing accounts through a guided tool-connection workflow with scoped credentials. Skills cross-reference each other: cold-email pulls from revops and sales-enablement, copywriting pulls from cro and ab-testing, and seo-audit pulls from schema and ai-seo. The README also lists verified partners (Converly, Ploy, AIsa, Omnia) whose integrations are disclosed and never influence what the core skills recommend.

Best for: Technical marketers and founders who want a free, MIT-licensed marketing skill collection with dedicated cold-email and lifecycle email skills

Pricing: Free (MIT-licensed)

Key features

• Dedicated cold-email skill covering B2B outbound, follow-ups, and sending setup
• Emails skill for lifecycle email, drip campaigns, and automated email flows
• Email-sequence skill (in the mysticaltech fork) focused on welcome series and nurture
• Shared product-marketing context that every other skill reads first
• MIT-licensed, so skills can be forked, modified, and redistributed freely
• Works with Claude Code, OpenAI Codex, Cursor, Windsurf, and any agent supporting the Agent Skills spec
• Documented tool-connection workflow for scoped credentials on marketing accounts
• Verified partner integrations that are disclosed and never influence core skill recommendations

Pros

• Free and MIT-licensed with no usage restrictions
• Dedicated skills for cold email, lifecycle emails, and email sequences
• Shared context document keeps messaging consistent across channels
• Skills cross-reference each other so outputs stay coherent
• Documented tool-connection workflow for live marketing accounts

Cons

• Requires manual installation or CLI use; no hosted directory or one-click install
• No built-in security scanning or benchmarked performance data per skill
• Live account work depends on connecting the right MCP servers or CLIs separately
• Maintained by a single creator, so update cadence depends on one person's bandwidth

Visit Corey Haines marketingskills

#3 Hyper Marketing Skills (Hyper MCP)

Hyper's marketing-skills repository is an MIT-licensed collection of skills for paid ads, social, SEO research, competitor analysis, creative generation, email, and analytics, all powered by Hyper MCP. According to the repository, each skill's table lists the integrations required for the workflow: meta-ads needs Meta Business, analytics-insights needs connected analytics tools, and the email skills connect through Hyper MCP's configured integrations. Hyper publishes the skill table with required dependencies so you can see what you need to wire up before running a workflow. The collection is positioned for marketers who want to run connected workflows rather than isolated prompts. Hyper's documentation covers configurable approval rules, so an agent can draft a campaign or email sequence and then wait for a human to approve before sending. The repository's own README notes that Hyper offers a 7-day free trial followed by a $49 per month subscription, which covers the connected MCP infrastructure the skills rely on. For email and outreach specifically, the email skills in the repository cover lifecycle and broadcast email through connected ESP integrations, with the exact set depending on which accounts you connect through Hyper MCP.

Best for: Marketers who want connected email and outreach workflows through a single MCP layer rather than isolated skill installs

Pricing: Free 7-day trial, then $49/month for Hyper MCP infrastructure

Key features

• MIT-licensed marketing skills repository
• Email skills covering lifecycle and broadcast through connected ESP integrations
• Skills for paid ads, social, SEO research, competitor analysis, creative, and analytics
• Hyper MCP powers connected workflows across marketing platforms
• Documented integration requirements per skill in the repository's skill table
• Configurable approval rules so agents draft and humans approve before sending
• Works with any agent that supports the Agent Skills spec

Pros

• Clear documentation of which integrations each skill needs
• Approval rules let humans review drafts before any campaign goes live
• MIT-licensed skills so the collection itself is free
• Single MCP layer covers email, ads, analytics, and social in one place

Cons

• Requires paid Hyper MCP subscription after the trial for connected account work
• Skill capabilities depend on which accounts you connect through Hyper MCP
• Smaller community than the largest free repositories
• No benchmarked performance data per skill

Visit Hyper Marketing Skills (Hyper MCP)

#4 Marketing Skills Directory (marketingskills.sh)

Marketingskills.sh is an open marketing skills ecosystem that, according to its homepage, indexes 1,331 marketing skills across SEO, paid ads, content marketing, analytics, strategy, and social media. Every skill is scored on four dimensions (insight, objectivity, actionability, and impact) so users can judge quality before installing, and each skill installs with a single command (`npx skills add owner/repo`) that works across Claude Code, Cursor, Codex, and any agent supporting the open skills format. For email and outreach work, the directory's content marketing category (259 skills according to the homepage) covers content calendars, briefs, posts, and repurposing across channels, which includes email newsletter planning and lifecycle content. The skills are served in agent-readable form on every page, and the directory is free to install. The site also publishes a briefing newsletter for marketers who want to track which skills are worth installing and which workflows are actually working in production.

Best for: Marketers who want a scored, browsable directory of marketing skills with one-command installs across multiple agents

Pricing: Free

Key features

• 1,331 marketing skills indexed across SEO, paid ads, content, analytics, strategy, and social
• Each skill scored on insight, objectivity, actionability, and impact
• One-command install via `npx skills add owner/repo`
• Works with Claude Code, Cursor, Codex, and other agents reading SKILL.md
• Skills served in agent-readable form on every page
• Free to install with no paywall on the directory itself
• Briefing newsletter covering skills worth installing and real marketer workflows

Pros

• Four-dimension quality scoring before install
• Cross-agent compatibility with one install command
• Free to browse and install
• Newsletter tracks which skills are actually working in production

Cons

• Email and outreach skills are part of the broader content marketing category rather than a dedicated email section
• No benchmarked Lift data, only editorial scoring
• Quality scores are editorial judgments rather than measured performance
• Newer directory, so community coverage is still building

Visit Marketing Skills Directory (marketingskills.sh)

#5 AgenticSkills

AgenticSkills is a curated directory that, according to its own site, indexes 193 skills across 16 categories and 139 MCP servers, covering Claude Code, OpenAI Codex, Cursor, Gemini CLI, and other agents that read SKILL.md. The directory is selected rather than crawled: something has to be added for it to appear, which keeps the catalog small enough to describe, categorize, and keep an eye on. The signals shown next to each skill are ones you can check against the source repository, including commit recency on the skill's own path, contributor count, and whether the publishing org is who it claims to be. For email and outreach work, AgenticSkills lists skills like Marketing Skills by Corey Haines (covering CRO, copywriting, SEO, analytics, paid ads, lifecycle email, and growth engineering), Claude SEO by Daniel Agrici, and Social Media Skills by Charlie Hills. Quality ranks are labeled editorial in the interface because that is what they are: judgment, not measurement. Install counts were removed in May 2026 for the same reason, since the first question anyone reasonable asks is how the ranking was determined. The directory publishes its methodology so readers can see what is and is not scored.

Best for: Readers who want a small, curated, methodologically transparent directory over a million-skill crawler

Pricing: Free

Key features

• 193 curated skills across 16 categories and 139 MCP servers
• Selected rather than crawled, so the catalog stays small and describable
• Signals include commit recency on the skill's own path and contributor count
• Editorial quality ranks clearly labeled as judgment, not measurement
• Cross-platform coverage for Claude Code, Codex, Cursor, and Gemini CLI
• Published methodology explaining what is and is not scored
• Includes marketing and outreach collections like Corey Haines' Marketing Skills

Pros

• Transparent methodology with clear labeling of editorial vs measured signals
• Small enough catalog to actually describe each entry
• Cross-platform coverage across the major agent clients
• Removes install counts to avoid popularity-as-quality bias

Cons

• Much smaller catalog than the aggregators, so niche skills may not be listed
• Quality ranks are editorial, not benchmarked
• No automated security scan published per skill
• No email-specific category; email skills live inside marketing or content collections

Visit AgenticSkills

#6 Skills Directory

Skills Directory is an indexed and security-scanned agent skills directory that, according to its homepage, has indexed hundreds of thousands of SKILL.md files and runs automated security analysis on every listing. The site states that 36% of skills in the wild carry security flaws and that it scans for prompt injection, credential theft, data exfiltration, and other threat categories across 120 detection patterns and 10 threat categories. Submissions are reviewed before publishing. For email and outreach work, Skills Directory's Content & Marketing category covers the marketing-adjacent skills in the ecosystem, and the directory's CLI install (`npx -y skills find`) works across Claude and coding agents that read SKILL.md. The site's positioning is security-first: it does not try to be the biggest catalog, but it does publish its detection methodology and runs every listing through the same scan. The trade-off, as the site itself acknowledges, is a smaller curated index than the mega-crawlers.

Best for: Users who care about security review before installing any skill, including email and outreach skills

Pricing: Free

Key features

• Automated security analysis on every listed skill
• 120 detection patterns across 10 threat categories
• Submissions reviewed before publishing
• CLI install via `npx -y skills find`
• Content & Marketing category covering marketing-adjacent skills
• Detection methodology published on the site
• Works with Claude and coding agents that read SKILL.md

Pros

• Automated security scan on every listing
• Published detection methodology with specific pattern counts
• Submissions reviewed before going live
• Free to browse and install

Cons

• Smaller curated index than the mega-crawlers
• No benchmarked performance data per skill
• Email and outreach skills live inside the broader Content & Marketing category
• Self-reported index size changes continuously, making exact counts hard to pin down

Visit Skills Directory

#7 SkillsMP

SkillsMP is one of the largest community-driven marketplaces for AI coding agent skills, aggregating SKILL.md files from public GitHub repositories. According to the AgenticSkills directory comparison, SkillsMP reports over two million skills indexed, with search, category, and occupation filters and no published ranking method. The site explicitly states that entries are aggregated from public GitHub rather than certified, so users are expected to evaluate each skill before installing. For email and outreach work, SkillsMP's breadth means you can find marketing, copywriting, and outreach-adjacent skills from across GitHub in one search, with filters for occupation and category. The trade-off is curation: with millions of indexed files and no published review, you are doing the trust decision yourself on every install. The site is free to browse and pulls directly from source repositories.

Best for: Users who want the broadest possible discovery surface and are willing to audit each skill before installing

Pricing: Free

Key features

• Over two million SKILL.md files aggregated from public GitHub
• Search, category, and occupation filters
• Cross-platform coverage for Agent Skills
• Free to browse and install
• Pulls directly from source repositories
• Useful for discovery when you know roughly what you are looking for

Pros

• Largest catalog by self-reported count
• Free to browse and install
• Filters by occupation and category help narrow marketing and outreach searches
• Direct links to source repositories

Cons

• No published ranking or vetting method
• No automated security scan or benchmarked performance data
• Catalog size means many entries are abandoned experiments or duplicates
• Trust decision falls entirely on the user for every install

Visit SkillsMP

Conclusion

The right Claude skills for email and outreach depend on how you work. If you want benchmarked Lift data, a free MCP connector, and per-agent loadouts so each agent only sees the skills you actually want it to use, SkillzBench is the obvious starting point: everything on the platform is free, the directory is independent, and ad money never touches the scores. If you want a free, MIT-licensed collection with dedicated cold-email and lifecycle-email skills and a shared product-marketing context, Corey Haines' marketingskills repository is the most widely cited option. If you want connected workflows through a single MCP layer with approval rules, Hyper's marketing skills plus Hyper MCP cover email, ads, analytics, and social in one place. If you want a scored, browsable directory with one-command installs, marketingskills.sh gives you 1,331 marketing skills with four-dimension quality scoring. If you want a small, methodologically transparent curated catalog, AgenticSkills publishes its criteria and removes install counts to avoid popularity bias. If you want security scanning on every listing, Skills Directory runs 120 detection patterns across 10 threat categories. And if you want the broadest possible discovery surface and are willing to audit each skill yourself, SkillsMP indexes over two million SKILL.md files from GitHub. Browse the free skills directory at skillzbench.com to see verified Lift results and trust scores before you install anything, and use the free MCP connector to wire the skills you choose into Claude Code, Codex, Cursor, or Gemini CLI without per-skill version management.

Frequently asked questions

What makes SkillzBench different from a regular skills directory?

SkillzBench is the only directory on this list that benchmarks every skill in a sandbox with the same model, running it both with and without the skill, and publishes the Lift in percentage points. It also pins every version to a commit SHA, runs security and license checks, and gives you a free MCP connector plus per-agent loadouts so each agent only sees the skills you chose. Trust scores (0-100 from security, quality, license, maintenance, and community signals) are always shown separately from Lift, and ad money never touches either number.

Are Claude skills safe to install?

Not automatically. A skill is instructions an agent executes, often including scripts, so it carries the same risk as running someone else's code. Published research has found roughly a quarter of skills in the wild carry at least one vulnerability, and Skills Directory reports that 36% of skills tested show security flaws including prompt injection, credential theft, and data exfiltration. Read the SKILL.md and any scripts folder before installing, prefer directories that scan or benchmark skills, and use per-agent loadouts so a compromised skill cannot reach tools it does not need.

Which skill is best for cold B2B outreach?

Corey Haines' marketingskills repository includes a dedicated cold-email skill that covers B2B outbound, follow-ups, sending setup, and LinkedIn touches, and it pulls from related skills like revops and sales-enablement so the messaging stays consistent with positioning. For benchmarked performance data on which cold-email skills actually move reply rates, SkillzBench publishes Lift results measured in a sandbox so you can compare options before installing.

Can I use these skills with agents other than Claude Code?

Yes. The SKILL.md format is an open standard originally developed by Anthropic and adopted across Claude Code, OpenAI Codex, Cursor, Gemini CLI, GitHub Copilot, Windsurf, and other agents. Most repositories on this list document cross-agent compatibility, and the `npx skills add` CLI from Vercel Labs works across Claude Code, Codex CLI, Cursor, and OpenClaw. SkillzBench's free MCP connector goes further: it lets you toggle skills and tools per agent so each agent only sees what you chose.

Do I need to pay for any of these?

Six of the seven options on this list are free to browse and install. SkillzBench, Corey Haines' marketingskills (MIT-licensed), marketingskills.sh, AgenticSkills, Skills Directory, and SkillsMP are all free. Hyper's marketing skills repository is MIT-licensed, but the connected Hyper MCP infrastructure that powers live account workflows costs $49 per month after a 7-day free trial. Paid tiers on other platforms typically cover extras like downloads, setup help, training, or creator-supported marketplaces rather than the skills themselves.

How do I know if a skill actually works?

Install counts and star totals are popularity signals, not performance data. The most rigorous option is SkillzBench, which benchmarks every skill in a sandbox with the same model, both with and without the skill, and publishes the Lift in percentage points. Other directories use editorial scoring (marketingskills.sh scores on insight, objectivity, actionability, and impact) or curated selection (AgenticSkills) rather than measured performance. For email and outreach work specifically, the best test is to run the skill on a small batch of real sequences and measure reply or conversion rates against a control.

What is the difference between a skill and an MCP server?

A skill gives an agent knowledge: how your team writes emails, what your positioning is, what good outreach looks like. An MCP server gives an agent access: a live connection to your email platform, CRM, or database. Skills are instructions; MCP servers are tools. Most real setups use both, which is why directories like AgenticSkills and SkillzBench index skills and MCP servers side by side. For email and outreach work, a typical stack combines a cold-email or lifecycle-email skill with an MCP server that connects to your sending platform.