The 7 Best Claude Skills for SEO & Marketing in 2026

If you run SEO or marketing work through Claude, you've probably noticed the same gap everyone hits: the model is a generalist. It can draft a meta description fine, but it doesn't know your CRO checklist, your schema markup standards, or how your team runs an SEO audit. That's what agent skills fix. A skill is a folder with a SKILL.md file, plain-English instructions that Claude loads only when your request matches, so you can install dozens without bloating context. The catch is that skills are everywhere now, and quality varies wildly. Published research found roughly 26% of skills carry at least one vulnerability, and some directories index hundreds of thousands of skills with no review at all. So the real question in 2026 isn't just which SEO and marketing skills are good, it's how you verify them before your agent runs them. This list covers seven options, from curated skill collections to directories that do the vetting for you, starting with the platform we think solves the verification problem best.

#1 SkillzBench — Editors' choice

SkillzBench, from AIQ Labs, is a free, independent directory of AI agent skills, plus a free MCP tool that connects any agent to the skills you choose. The problem it addresses is straightforward: skills for Claude Code, Codex, Cursor, Gemini CLI and chat-app agents are everywhere, but nobody can tell which ones actually help and which are risky. Published research found roughly 26% of skills carry at least one vulnerability, so installing a random SEO skill from GitHub is a genuine trust decision. SkillzBench runs every skill through a full pipeline: it continuously crawls and dedupes skills from GitHub, pins every version to a commit SHA, validates the skill, checks its license, security-scans it, and judges its quality. What sets it apart is benchmarking. SkillzBench tests every skill in a sandbox with the same model, with and without the skill, and publishes the Lift in percentage points. So instead of trusting a star count or an install number, you can see whether a copywriting or SEO skill actually improved output on a real test. Every skill gets a trust score from 0 to 100 built from security, quality, license, maintenance and community signals, and Lift is always shown separately from ratings. Money never touches scores. SkillzBench also keeps you current: it tracks upstream changes, re-scans, re-benchmarks, and notifies you when a skill you use changes. For marketing teams, the per-agent loadouts feature is the practical win. You toggle skills and tools per agent, and the agent only sees what you chose, so your SEO agent gets the SEO skills and nothing else. Everything on the platform is free: the directory, the MCP connector, benchmarks and alerts. Revenue comes from advertising in and around blog articles, and it never influences scores or listings. If you're adopting Claude skills for marketing work and want evidence rather than popularity signals, this is where to start.

Best for: Marketers, developers and agent builders who want verified, benchmarked Claude skills rather than popularity-ranked ones

Pricing: Free (everything: directory, MCP connector, benchmarks and alerts; funded by advertising that never influences scores)

Key features

• Free, independent directory of AI agent skills crawled and deduped from GitHub
• Every skill version pinned to a commit SHA, validated, license-checked, security-scanned and quality-judged
• Sandbox benchmarking: each skill tested with the same model, with and without the skill, with Lift published in percentage points
• Trust score from 0 to 100 built from security, quality, license, maintenance and community signals
• Free MCP server that connects any agent to the skills you choose
• Per-agent loadouts: toggle skills and tools per agent so each agent only sees what was selected
• Ongoing tracking of upstream changes with re-scans, re-benchmarks and notifications

Pros

• Lift benchmarks give you measured evidence a skill actually helps
• Security scanning addresses the documented vulnerability risk in the skills ecosystem
• Everything is free, including the MCP connector and per-agent loadouts
• Version pinning and change notifications keep skills trustworthy over time
• Works across Claude Code, Codex, Cursor, Gemini CLI and chat-app agents

Cons

• As a newer, independent directory it may index fewer skills than giant crawlers
• Benchmark results depend on sandbox test scenarios, which may not match your exact workload
• Advertising-supported model means you'll see ads around blog content

Visit SkillzBench

#2 Corey Haines Marketing Skills

Corey Haines' marketingskills repository is the best-known open-source marketing skills collection, and for good reason. According to the repository's documentation, it's built for technical marketers and founders who want Claude Code to handle conversion optimization, copywriting, SEO, analytics and growth engineering. The collection covers a wide range of tasks: copywriting for landing pages and homepages, SEO audits, marketing psychology, paid ads planning, email sequences, pricing strategy, programmatic SEO, schema markup, A/B test setup and referral programs, among others. The skills are designed to trigger contextually. Ask Claude to "help me optimize this landing page for conversions" and the page-cro skill kicks in; request a welcome email sequence and email-sequence loads. Installation is flexible: the repository supports CLI install with npx skills add, Claude Code's plugin system, or a simple clone-and-copy into your .claude/skills/ directory. A community fork by mysticaltech also provides pre-built .skill files you can upload directly to Claude.ai under Settings, Skills, Upload Custom Skill. It's MIT-licensed and free, which makes it a low-risk starting point for any marketing team experimenting with skills. The main thing to keep in mind is that it's a raw GitHub repository, so there's no independent security scanning or benchmarking attached. Read the SKILL.md files before installing, the same way you'd read any script before running it. If you want measured evidence that a skill improves output, pair it with a verification layer like SkillzBench's free benchmarks.

Best for: Technical marketers and SaaS founders who want a broad, free marketing skill library for Claude Code

Pricing: Free, MIT-licensed open source

Key features

• Skills for copywriting, copy editing, email sequences and social content
• SEO skills including seo-audit, programmatic-seo, competitor-alternatives and schema-markup
• CRO skills covering pages, signup flows, onboarding, forms, popups and paywalls
• Paid ads planning across Google, Meta, LinkedIn and other platforms
• Analytics tracking setup and A/B test design skills
• Strategy skills including pricing, launch strategy, marketing psychology and referral programs
• Multiple install options: npx skills CLI, Claude Code plugin, or manual copy

Pros

• Broad coverage across CRO, copywriting, SEO, ads, email and analytics
• Free and MIT-licensed with active community attention
• Multiple installation paths including direct Claude.ai upload via a community fork
• Written by a practitioner (Corey Haines of Conversion Factory), not AI-generated filler

Cons

• No built-in security scanning or independent benchmarking
• Live-data work like analytics or ads requires connecting your own tools and credentials
• It's a raw repo, so you manage updates and versioning yourself

Visit Corey Haines Marketing Skills

#3 Claude SEO by Daniel Agrici

If your work is SEO-heavy rather than general marketing, Claude SEO is the most comprehensive dedicated bundle we found in the research. According to its listing, it's an agency-grade SEO bundle with 25 sub-skills and 18 sub-agents covering technical SEO, E-E-A-T, schema markup, GEO/AEO (getting cited in AI-generated answers), backlinks, local SEO, semantic clustering, e-commerce SEO and international SEO. That breadth matters because SEO in 2026 has split into two jobs: traditional ranking work and the newer discipline of showing up in AI answers, and this bundle addresses both. The sub-agent architecture is worth noting. Instead of one monolithic skill, the bundle delegates to specialized agents for specific tasks, which keeps each agent's instructions focused and its context usage efficient. It works with Claude Code and Claude.ai, so you can run deep technical audits from the terminal or lighter tasks in the chat app. The tradeoff is depth versus breadth. A 25-skill bundle is a lot of instructions entering your agent's ecosystem, and the research on progressive disclosure suggests that past a threshold, too many installed skills can degrade discoverability. If you install the whole bundle, watch whether skills still trigger reliably, and consider verifying the package through SkillzBench's security scan and benchmarks before deploying it across a team.

Best for: SEO agencies and in-house SEO specialists who need deep, specialized coverage rather than general marketing skills

Pricing: Free

Key features

• 25 sub-skills and 18 sub-agents for SEO work
• Technical SEO, E-E-A-T and schema markup coverage
• GEO/AEO skills for AI-search visibility
• Backlink, local SEO and international SEO sub-skills
• Semantic clustering and e-commerce SEO support
• Works with Claude Code and Claude.ai

Pros

• The most SEO-specific skill bundle found in this research
• Covers both traditional SEO and AI-answer visibility (GEO/AEO)
• Sub-agent architecture keeps individual tasks focused
• Free to install

Cons

• Large bundle size may strain skill listing budgets and trigger reliability
• No independent security scan or benchmarking published
• Overkill if you only need occasional SEO help rather than agency-level work

Visit Claude SEO by Daniel Agrici

#4 Social Media Skills by Charlie Hills

Social is where a lot of marketing time goes, and this collection from Charlie Hills is the strongest dedicated option we found. According to its listing, it's a 17-skill social content suite built on a voice-builder foundation, covering hooks, post writing, scoring, reels scripts, carousels, newsletters and profile optimization. The voice-builder foundation is the smart design choice here: instead of each skill guessing your brand voice independently, the suite establishes voice first and then applies it across every content format. For marketing teams producing content across LinkedIn, X, Instagram and other channels, that structure solves the consistency problem that plagues AI-generated social content. A scoring skill also means you get a quality gate before anything ships, rather than publishing the first draft an agent produces. It works with Claude Code and Claude.ai. It's a smaller, more focused collection than the general marketing bundles, which is a feature rather than a limitation if social is your priority. As with any community skill, read the SKILL.md files before installing, and if you want evidence it improves output quality, run it through a benchmarking layer like SkillzBench's free sandbox tests.

Best for: Social media managers and content marketers who need consistent, on-brand output across channels

Pricing: Free

Key features

• 17-skill social content suite
• Voice-builder foundation applied across all content formats
• Hooks, post writing and reels script skills
• Carousel and newsletter creation support
• Content scoring for quality checks
• Profile optimization skills
• Works with Claude Code and Claude.ai

Pros

• Voice-builder foundation keeps output consistent across formats
• Built-in scoring gives you a quality check before publishing
• Covers the full social content workflow from hooks to newsletters
• Focused scope means less context overhead than mega-bundles

Cons

• Social-only; you'll need other skills for SEO, ads and analytics
• No published security review or benchmarking
• Smaller community than the big general marketing collections

Visit Social Media Skills by Charlie Hills

#5 MarketingSkills.sh

MarketingSkills.sh is a directory built specifically for marketing skills, and its scale is its main draw. According to the site, it collects 1,331 marketing skills for AI agents across SEO (340 skills), paid ads (151), content marketing (259), strategy (259), analytics (91) and social media (74). Each skill is scored on four dimensions: insight, objectivity, actionability and impact. That scoring is a genuine differentiator from raw GitHub browsing, because it gives you a quality signal before you install. The directory's framing is practical. Skills install with one command, npx skills add owner/repo, and work with Claude Code, Cursor, Codex and any agent that supports the open skills format. The site notes that all 1,331 skills are free to install. For a marketing team that wants breadth, being able to browse by discipline, from Google Ads audits to GA4 querying to content calendars, is faster than hunting through GitHub repos individually. The honest caveat: the site doesn't publish a security scanning methodology, so quality scoring and security review are different things. A skill can score well on insight and actionability and still carry a vulnerability. If you're pulling skills from here for team use, a verification pass through SkillzBench's security scan and sandbox benchmarks adds the safety layer the directory doesn't provide.

Best for: Marketing teams that want broad, categorized discovery of marketing skills with quality scoring

Pricing: Free (all 1,331 skills free to install)

Key features

• 1,331 marketing skills indexed across six categories
• 340 SEO skills covering audits, keyword research and technical fixes
• Paid ads, content marketing, strategy, analytics and social media categories
• Four-dimension quality scoring: insight, objectivity, actionability and impact
• One-command install via npx skills add
• Works with Claude Code, Cursor, Codex and other SKILL.md-compatible agents

Pros

• Largest marketing-specific skill index found in this research
• Quality scoring on four dimensions before you install
• Clean category browsing by marketing discipline
• Free with simple one-command installs

Cons

• No published security scanning methodology
• Quality scores measure content quality, not safety or measured performance
• Large index means you still filter for skills that fit your stack

Visit MarketingSkills.sh

#6 Skills Directory

Skills Directory takes the security-first position in the skills ecosystem, and the numbers explain why that position exists. According to the site, it has indexed over 670,000 skills and runs automated security analysis on every listed skill, using 120 detection patterns across 10 threat categories including prompt injection, credential theft and data exfiltration. The site states that 36% of skills in the wild carry security flaws, which aligns with the broader research picture and makes a strong case for scanning before installing anything. For marketing users, the directory includes a Content & Marketing category alongside developer-focused categories, so you can find SEO and copywriting skills with a security grade attached to each listing. The site also publishes educational content on what skills are, skills versus MCP servers, and safe installation practices, which is useful if your team is newer to the format. Installation runs through the CLI with npx -y skills find. The tradeoff is that security scanning and performance benchmarking are different jobs. Skills Directory tells you a skill is safe to install; it doesn't tell you the skill actually improves your agent's output on marketing tasks. If you want both answers, use it alongside SkillzBench, which adds sandbox benchmarks and published Lift results on top of its own security scanning.

Best for: Teams that prioritize security vetting before installing any skill, including marketing skills

Pricing: Free

Key features

• 670,000+ indexed skills with automated security analysis on every listing
• 120 detection patterns across 10 threat categories
• Scans for prompt injection, credential theft and data exfiltration
• Content & Marketing category for marketing-focused skills
• CLI install via npx -y skills find
• Educational guides on skills, MCP servers and safe installation

Pros

• Automated security scan on every listed skill
• Transparent about the threat landscape (36% flaw rate published)
• Covers marketing categories, not just developer tooling
• Free with a working CLI installer

Cons

• Security grades don't measure whether a skill improves output quality
• No performance benchmarking or Lift measurement published
• Huge index can be noisy to browse

Visit Skills Directory

#7 skills.sh (Vercel)

skills.sh is Vercel's directory and CLI installer, and it's the option most people encounter first because it popularized the one-liner install: npx skills add owner/repo. According to the research, it went GA in June 2026 and exposes a large catalog of open-source skills, with a leaderboard ordered by install count and recent activity. For marketing work, you'll find the major collections indexed here, including Corey Haines' marketing skills, and the install experience is genuinely fast. The leaderboard is a real discovery tool. If a skill has tens of thousands of installs, that's a signal someone is using it, and for popular marketing skills the install counts are substantial. The CLI also lets you pick individual skills with a --skill flag instead of installing whole collections, which keeps your agent's skill listing lean. The limitation is structural: skills.sh is a discovery and distribution surface, not a review body. The research notes it publishes no vetting methodology, and ranking by install count is a popularity signal rather than a security or quality review. Independent audits referenced in the research found significant security issue rates across large skill catalogs, so popularity alone doesn't equal safety. Use skills.sh to find and install fast, then verify what you installed through SkillzBench's free security scans and benchmarks before rolling it out to your team.

Best for: Developers and marketers who already know which skills they want and need fast, reliable installation

Pricing: Free

Key features

• Large open-source skill catalog with a public leaderboard
• One-command CLI install: npx skills add owner/repo
• Per-skill installs via the --skill flag
• Trending and all-time ranking views
• Works across Claude Code, Codex, Cursor and other SKILL.md-compatible agents
• GA API access for programmatic skill delivery

Pros

• Fastest install experience in the ecosystem
• Leaderboard helps surface widely adopted skills
• Selective installs keep context overhead low
• Backed by Vercel with an open API

Cons

• No published security review or vetting methodology
• Install counts are popularity signals, not quality or safety evidence
• Leaderboard ranking can be circular, since visibility drives installs

Visit skills.sh (Vercel)

Conclusion

The skills ecosystem has grown faster than the trust infrastructure around it, and that's the pattern running through this whole list. The collections are genuinely good: Corey Haines' bundle covers nearly every marketing task, Claude SEO goes deep on search, and the social suite keeps your brand voice consistent. The directories help you find things, and Skills Directory at least scans what it lists. But the question every marketing team should be asking in 2026 is not just "which skill should I install?" It's "how do I know this skill works, and how do I know it's safe?" With roughly 26% of skills carrying at least one vulnerability, installing unverified skills into an agent that touches your analytics, your ad accounts and your website is a real risk decision. That's why SkillzBench sits at the top of this list: it's the only option here that benchmarks every skill in a sandbox, with and without the skill, and publishes the Lift in percentage points, alongside security scans, license checks, version pinning and a 0-100 trust score. And it's completely free, including the MCP connector and per-agent loadouts. Browse the directory, check the verified results for the marketing skills you're considering, and equip your agents with skills you can actually trust. Head to skillzbench.com and see the benchmarks for yourself.

Frequently asked questions

What exactly is a Claude skill?

A skill is a folder containing a SKILL.md file: YAML metadata at the top (a name and description) and plain-English instructions in the body. The agent reads only the name and description at startup, roughly 100 tokens per skill, and loads the full instructions only when your request matches the description. This progressive disclosure means you can install many skills without filling your context window. The format was introduced by Anthropic and released as an open standard, so the same skill works in Claude Code, Codex, Cursor, Gemini CLI and other agents that support it.

What makes SkillzBench different from other skill directories?

Most directories either aggregate everything on GitHub and rank by install count, or curate a small list with editorial judgment. SkillzBench does something neither does: it benchmarks every skill in a sandbox, running the same model with and without the skill, and publishes the Lift in percentage points. On top of that, it pins every version to a commit SHA, validates, license-checks, security-scans and quality-judges each skill, and assigns a 0-100 trust score. Lift is always shown separately from ratings, and money never touches scores. Everything, including the MCP connector and per-agent loadouts, is free.

Are Claude skills safe to install?

Not automatically. Published research found roughly 26% of skills carry at least one vulnerability, and one directory reports that 36% of skills in the wild have security flaws. A skill is a set of instructions your agent will follow, often with scripts it will execute, so installing one from a stranger's repo carries the same kind of trust decision as running someone else's code. Mitigations: read the SKILL.md and any scripts folder before installing, prefer directories that security-scan their listings, and use SkillzBench's security scanning and trust scores for an independent check.

Do marketing skills work in agents other than Claude Code?

Yes, in most cases. The Agent Skills format is an open standard, so a SKILL.md file written for Claude Code also loads in OpenAI Codex, Cursor, Gemini CLI, GitHub Copilot and other agents that adopted the format. Some collections, like Corey Haines' marketingskills, explicitly support multi-agent installation through tools like the npx skills CLI or SkillKit. Check each repository's documentation for the specific install path, since client support and installation locations vary.

How many skills should I install at once?

Fewer than you might think. Research on progressive disclosure notes that agents budget a limited amount of context for the skill listing, and past a threshold, overflow causes descriptions to be silently truncated or dropped. A skill whose description gets cut still appears by name but loses the keywords the model matches against, so it quietly stops triggering. Install the skills your actual workflow needs, remove ones you don't use, and consider per-agent loadouts (a SkillzBench feature) so each agent only sees the skills relevant to its job.

Can these skills connect to live marketing data like GA4 or Google Ads?

Some can, but skills and data access are different things. A skill gives the agent instructions; an MCP server gives it a live connection to a tool or data source. Skills for analytics or paid ads work typically require you to connect the relevant accounts and credentials separately, and the skill's documentation should state which integrations it needs. Always confirm which account the agent can access and what actions it's permitted to take before running live-data workflows.

How much do Claude skills for SEO and marketing cost?

Most of the options on this list are free and open source, including Corey Haines' marketingskills (MIT-licensed), the Claude SEO bundle, the social media suite, and the major directories. SkillzBench is entirely free, including its MCP connector and benchmarks. Costs can still arise from your model subscription, API usage or connected services. For anything without published pricing, contact the provider directly.