Grok Build reads skills from ./.grok/skills and ~/.grok/skills. Its documentation states that the allowed-tools field does not grant or restrict any tool. Official documentation β
These skills use the open SKILL.md format that Grok Build reads, but their author does not list Grok Build. We have not tested them there; scripts or tool names can differ.
Official Ayrshare plugin: 13 skills and an MCP server to publish, schedule, reply to comments and DMs and read analytics across social networks.
- By: Ayrshare
- Works in: Claude
- Cost: Free; paid Ayrshare subscription
FSkill (SKILL.md), official 5 official Firecrawl workflows: SEO audit, lead generation, lead research, competitive intelligence and market research, from the web.
- By: Firecrawl
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free skills; Firecrawl has a free plan (1,000 credits)
HSkill (SKILL.md), official 12 skills from Humblytics: A/B tests, click maps, funnels, Meta and Google Ads revenue attribution and page audits, from your live Humblytics data.
- By: Humblytics
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free skills (MIT); Humblytics Plus plan or higher needed for the MCP
H30 skills from Hyper to launch and track Google, Meta, TikTok, Reddit, Pinterest, Amazon and OpenAI Ads campaigns, run SEO research, read GA4 and Search Console, and run lifecycle emails, through the Hyper MCP server.
- By: Hyper (hyperfx.ai)
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free skills (MIT); Hyper MCP server per the publisher's plans
JJotform's official MCP server and 3 plugins: create and edit forms, surveys and sign-ups, read responses, build client portals and prepare documents for signature.
- By: Jotform
- Works in: MCP servers, Claude, ChatGPT, OpenAI Codex, Gemini CLI
- Cost: Free plugins; Jotform plans by volume
KKlickTipp's official plugin (German email marketing company): 13 skills for newsletters, automations, A/B tests, opt-in, fields, sending DNS and webinars, through KlickTipp's hosted MCP server.
- By: KlickTipp
- Works in: Claude, ChatGPT, OpenAI Codex
- Cost: Free plugin; KlickTipp account needed
211 go-to-market skills from LeadMagic: GTM architecture, targeting, cold email sequences, buying signals, B2B ads, pipeline metrics, CRM alerts.
- By: LeadMagic
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence); paid LeadMagic enrichment if you use it
MSkill (SKILL.md), official 5 skills from Mailneo: lifecycle, compliance (consent, unsubscribe, GDPR), email copywriting and deliverability, plus a skill to run a Mailneo account.
- By: Mailneo
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free skills (MIT); Mailneo account for the account skill
PPostiz skill and CLI to schedule posts on 28+ channels (X, LinkedIn, Instagram, TikTok, YouTube...) from your agent, with media upload and analytics.
- By: Postiz (Nevo David)
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (AGPL-3.0); paid hosted Postiz account or self-hosted
RPlugin and 8 skills from Revnu: the agent reads your project, answers "how do I get customers" and can set up Revnu, which runs outreach, ads and SEO and GEO pages.
- By: Revnu
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free skills (MIT); Revnu is paid with a free trial
SR32 SEO skills from SE Ranking: keyword gaps against competitors, per-URL GEO, AI search share of voice, sitemap, hreflang, Search Console and GA4 data.
- By: SE Ranking
- Works in: Claude, Cursor, Gemini CLI
- Cost: Free (MIT licence); paid SE Ranking account for the data
TSkill (SKILL.md), official Official Typefully skill: draft, schedule and publish your X, LinkedIn, Threads, Bluesky and Mastodon posts from your agent.
- By: Typefully
- Works in: Claude, Cursor
- Cost: Free skill; Typefully account needed
ASkill (SKILL.md), official Anthropic's official repository of 19 skills: brand guidelines, internal comms, design, Word, PowerPoint, Excel and PDF documents, and a guide to build your own skills.
- By: Anthropic
- Works in: Claude
- Cost: Free; included in paid Claude.ai plans
GSkill (SKILL.md), official 14 official Google advertising skills, 6 of which set up the Google Ads MCP server, diagnose an account, get started with the API and send audiences and conversions through the Data Manager API. The other 8 cover ads in mobile apps.
- By: Google
- Works in: Claude, OpenAI Codex, Gemini CLI
- Cost: Free (Apache-2.0 licence)
GSkill (SKILL.md), official 2 official Google skills for Google Analytics: query your GA4 reports and check your setup.
- By: Google
- Works in: Claude, OpenAI Codex, Gemini CLI
- Cost: Free (Apache-2.0 licence)
RSkill (SKILL.md), official 5 official Resend skills: send email, build React Email templates, handle webhooks and set up an inbox for an agent.
- By: Resend
- Works in: Claude, Cursor
- Cost: Free skills; Resend offers a free start
16 official Google Labs skills for Stitch, the AI UI design tool: write better prompts, generate a design system, turn screens into React pages or a Remotion walkthrough video.
- By: Google Labs
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (Apache 2.0); Google account for Stitch
S23 skills and an MCP server to produce ads: product photos, UGC videos with AI-generated actors, storyboards, format variants, competitor ad research and publishing to your accounts.
- By: SuperCMO
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free with your own keys (fal, ElevenLabs, Gemini...); or pay per use through SuperCMO
SSupermetrics' official MCP server and 14 skills: query your live ad, SEO and analytics data, find wasted spend, track budget pacing, executive reports, and create or change campaigns.
- By: Supermetrics
- Works in: MCP servers, Claude, ChatGPT, OpenAI Codex, Cursor
- Cost: 14-day trial without a card; Supermetrics subscription afterwards
UUnbounce's official plugins: 4 skills to build and edit Unbounce landing pages (Classic and AI Builder) from your assistant, modernise an imported page and add GA click tracking.
- By: Unbounce
- Works in: MCP servers, Claude, ChatGPT, OpenAI Codex
- Cost: Free plugins; Unbounce subscription needed
120 marketing skills, including 16 for SEO and GEO: keywords, competitors, links, technical SEO, content quality (CORE-EEAT grid), rank tracking and alerts.
- By: Aaron He Zhu
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (Apache 2.0 licence)
12 direct-response advertising and copywriting skills: offer strategy, angles, scripts and ad copy.
- By: Kim Barrett
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free
16 marketing skills in French for Claude Code: site audit, landing page, funnel, SEO, launch, ads, social calendar, copywriting, PDF report.
- By: mounra
- Works in: Claude
- Cost: Free (MIT licence)
15 marketing skills for Claude Code: full site audit, landing page, funnel, SEO, launch, ads, social calendar, copywriting, brand, PDF report.
- By: Zubair Trabzada
- Works in: Claude
- Cost: Free (MIT licence)
One French skill to write and review content that sounds human: list of AI writing tics to avoid and a review method.
- By: Stéphane Truphème (Captain Marketing)
- Works in: Claude
- Cost: Free (MIT licence)
7 French skills to edit videos with Remotion, including a full pack that bundles the other 6: raw footage, speeches, vertical 9:16 Reels, B-roll replacement, synced subtitles (French and Creole) and analysis of a reference video.
- By: Willarshann
- Works in: Claude, OpenAI Codex
- Cost: Free (MIT licence)
One French skill for a configurable SEO audit of a site through the Firecrawl connector (JavaScript-rendered pages), with the credit cost stated before crawling.
- By: NicolasW83
- Works in: Claude
- Cost: Free (MIT licence); Firecrawl credits
35 CRM and lifecycle skills: segmentation, transactional emails, deliverability, push, SMS and WhatsApp, loyalty, holdout tests and cohort reporting.
- By: 808enzo
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence)
34 skills to audit and run Google, Meta, YouTube, LinkedIn, TikTok and Microsoft campaigns: structure, conversion tracking, landing pages, CPA and ROAS maths, launch drafts.
- By: Daniel Agrici
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence); paid third-party services depending on use
32 skills to write, rewrite and optimise blog posts: briefs, topic clusters, multilingual versions, images, quality checks and repurposing for social media.
- By: Daniel Agrici
- Works in: Claude, Gemini CLI
- Cost: Free (MIT licence); paid third-party services depending on use
34 SEO skills for Claude Code: technical audit, content, schema, internal links, local SEO and AI search visibility, with optional connections to Search Console, Bing, Moz and DataForSEO.
- By: Daniel Agrici
- Works in: Claude, OpenAI Codex, Gemini CLI
- Cost: Free (MIT licence); connected APIs have their own pricing
52 skills in French: 49 marketing skills translated and adapted from Marketing Skills (Corey Haines) plus a writing pack. SEO, ads, email, CRO, A/B tests, referral, content.
- By: Florian Ferry
- Works in: Claude
- Cost: Free (MIT licence)
50 marketing skills from a large public collection: onboarding and CRO, local SEO, A/B tests, analytics tracking plan, content strategy, referral. Scripts use only standard Python.
- By: Alireza Rezvani
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence)
One full YouTube skill: channel audit, video SEO, retention-focused scripts, thumbnail ideas and competitor analysis through the YouTube API.
- By: Daniel Agrici
- Works in: Claude
- Cost: Free (MIT licence); YouTube API quota
One text-only skill to write cold outreach messages on LinkedIn, by email or on X, short and tailored to the person.
- By: Felix Lee
- Works in: Claude
- Cost: Free (MIT licence)
Skill that collects and analyses competitors' ads from ad libraries (Meta, LinkedIn).
- By: ComposioHQ
- Works in: Claude
- Cost: Free
Writing aid skill: research, citations, outline and review of your articles and newsletters.
- By: ComposioHQ
- Works in: Claude
- Cost: Free
13 media buying skills in French: Google, Meta and TikTok Ads audits, creative audit, media plan, Google Ads campaign assets, freelancer website.
- By: impulsion.com
- Works in: Claude
- Cost: Free
Social listening and market research in one skill: finds where a topic is discussed over the last 30 days, reads the original public posts (Reddit, YouTube, GitHub, forums) and returns a sourced brief that states what it could not cover.
- By: Runesmith Studio
- Works in: Claude
- Cost: Free (MIT licence); third-party tools to install
13 skills that study your market, competitors and public case studies, then suggest 7 to 9 low-cost growth tactics; tactics based on fake accounts, fake social proof or fake urgency are excluded by the instructions.
- By: acogood
- Works in: Claude, OpenAI Codex
- Cost: Free (MIT licence)
8 skills for Facebook Pages: posts, content plan, comment replies, repurposing from other networks, audience stats, publishing.
- By: Serge Bulaev
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence); paid third-party services depending on use
16 skills to audit a site's visibility in AI engines (ChatGPT, Perplexity, AI Overviews): citability, AI crawler access, llms.txt, schema, PDF report and client proposal.
- By: Zubair Trabzada
- Works in: Claude
- Cost: Free (MIT licence)
14 marketing playbooks (86 skills): static ads, lifecycle email, AI search visibility, content, performance analysis. Some go through GooseWorks' paid proxy.
- By: GooseWorks
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free skills (MIT); data reads paid in GooseWorks credits
Web and X search skill that queries Grok (xAI API) with cited sources, reads the pages found and keeps a 15-minute cache; Tavily, Firecrawl or DeepSeek act as fallbacks.
- By: BlueOcean223
- Works in: Claude
- Cost: Free (MIT licence); Grok calls billed by xAI
12 skills for AI engine visibility: brand profile, prompt research, site AEO audit, SEO and GEO content, resource pages, Reddit leads and free link ideas.
- By: OnVoyage AI
- Works in: Claude, OpenAI Codex
- Cost: Free (MIT licence); paid third-party services depending on use
Rewrites text that sounds AI-written so it reads like its author, without changing what it says. One text-only skill, widely reused.
- By: Siqi Chen
- Works in: Claude, OpenAI Codex, Gemini CLI
- Cost: Free (MIT licence)
French version of Humanizer: rewrites French text that sounds AI-written so it reads like its author, without changing what it says. One text-only skill.
- By: ferr079
- Works in: Claude
- Cost: Free (MIT licence)
7 Instagram skills in French: write a reel (26 hook formulas), caption, comment replies, DMs, stats reading, reels that work in your niche.
- By: Antoine Blanco
- Works in: Claude
- Cost: Free (MIT licence); PlugKit optional
9 skills for Instagram: analyse public accounts and posts, spot what works for competitors, write posts and replies, then publish after your approval.
- By: Sergey Bulaev
- Works in: Claude, OpenAI Codex
- Cost: Free (MIT licence); paid third-party services depending on use
Skill that finds prospects matching your ideal customer and prepares an approach for each one.
- By: ComposioHQ
- Works in: Claude
- Cost: Free
12 LinkedIn skills: write and schedule posts, analyse profiles and posts, check that a text does not read as AI-written.
- By: Serge Bulaev
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence); paid third-party services depending on use
One French skill to write or A/B test a short prospecting email (100 to 150 words) sent in volume, for a freelancer or small studio.
- By: N1D4L0S
- Works in: Claude
- Cost: Free
A competitive analysis and market research skill: feature and pricing matrices, battlecards, TAM/SAM/SOM, customer reviews, hiring signals, SWOT, Porter and positioning maps.
- By: Krishna Suryawanshi
- Works in: Claude, OpenAI Codex, Gemini CLI
- Cost: Free (MIT licence)
One French skill to write or fix marketing copy (LinkedIn, landing pages, outreach, newsletters) for small business owners, craftspeople and decision makers, without English calques.
- By: Enguerrand Quinard
- Works in: Claude, Cursor, Gemini CLI
- Cost: Free
One skill with 14 modules: website audit scored out of 100, AI search citability, copywriting, emails, ads, competitors, launch, with a "what I could not determine" section in every report.
- By: Yuzzyuk (Marketing OS contributors)
- Works in: Claude
- Cost: Free (MIT licence)
Library of 52 marketing skills: CRO, copywriting, SEO, AI search SEO, email, ads, launches, pricing, prospecting. Optional command line tools connect the skills to your marketing apps.
- By: Corey Haines
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence)
172 text-only marketing skills: SEO, GEO, pages, per-platform content (X, LinkedIn, TikTok, Reddit, YouTube, Pinterest), launch and strategy.
- By: kostja94
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence)
RA49 skills for Google Ads and Meta Ads: extensions, CPA diagnosis, ROAS forecast, spend pacing, day and hour breakdown, UTMs, landing page audit.
- By: irinabuht12-oss (Ryze)
- Works in: Claude, Cursor
- Cost: Free; Ryze connector per its plan
One skill to diagnose Meta Ads campaigns: reads results through the Graph API, creative fatigue, structure, budget and recommendations.
- By: Mathias Chu
- Works in: Claude
- Cost: Free (MIT licence)
Write and revise in contemporary French, without phrasing translated from English or AI writing tics, with a typography fixer and a sentence rhythm check.
- By: Arthur Renaud
- Works in: Claude
- Cost: Free (MIT licence)
RA8 SEO skills built on the Ryze connector: audit from Search Console and GA4, keywords, rank tracking, competitor gaps, backlinks, AI visibility.
- By: Ryze AI
- Works in: Claude, Cursor
- Cost: Free (MIT licence); Ryze connector per its plan
78 marketing skills: SEO audit, ChatGPT queries that mention a brand, blog posts, email sequences, newsletters, Google Ads reports, A/B tests, competitor traffic.
- By: OpenClaudia
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence); paid third-party services depending on use
11 go-to-market and growth marketing skills: launch strategy, positioning, growth loops, North Star metric, cohort analysis.
- By: PaweΕ Huryn
- Works in: Claude, OpenAI Codex, Gemini CLI, Cursor
- Cost: Free (MIT licence)
Rewrites a French text so it reads as written by someone who masters the language: rhythm, precise vocabulary, French punctuation, no stock phrases.
- By: Jordan Goussery
- Works in: Claude
- Cost: Free (MIT licence)
General French writing skill for articles, newsletters and pages: outline, tone, proofreading and a script that checks style tics before delivery.
- By: Anto1nx
- Works in: Claude
- Cost: Free (MIT licence)
Reviews a French text and returns a detailed report of typical AI turns of phrase (structures, tics, punctuation), with a suggested fix for each.
- By: Cateline Puccetti
- Works in: Claude
- Cost: Free (MIT licence)
Two SEO audit skills for a page or a site: tags, schema, robots, sitemap, social tags, speed through PageSpeed, HTML report.
- By: JeffLi1993
- Works in: Claude, Cursor
- Cost: Free (MIT licence)
Technical and content SEO audit skill for websites: tags, structure, structured data, performance, plus an optional script that checks whether ChatGPT, Claude and Gemini cite your brand.
- By: Matthew Blode
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence)
23 French skills for small businesses, built for Belgium: marketing (company LinkedIn post, editorial calendar, FR/NL/EN adaptation), sales (proposal, objections, meeting prep) plus HR, finance, legal and support.
- By: Jean-Baptiste Dhondt
- Works in: Claude
- Cost: Free (MIT licence)
47 marketing skills in French: copywriting, CRO, SEO, email, ads, launches. French adaptation of Corey Haines' Marketing Skills.
- By: David Corroy
- Works in: Claude
- Cost: Free (MIT licence)
33 SEO and GEO (AI search visibility) skills in French: technical audit, content, backlinks, sitemap, schema. Derived from Claude SEO.
- By: David Corroy
- Works in: Claude
- Cost: Free (MIT licence)
A skill and a command-line tool that flag AI writing tics in French text (false contrasts, empty phrases...) and suggest fixes.
- By: tns-research
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence)
18 skills to research a market and its competitors, find communities and acquisition channels, run keyword research with Keywords Everywhere and repurpose content.
- By: Superamped
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence); paid Keywords Everywhere credits
11 SEO skills for Claude and Cursor: keyword research, briefs, writing, content optimisation and audits, with no API key.
- By: InhouseSEO
- Works in: Claude, Cursor
- Cost: Free (Apache-2.0 licence)
8 skills for Threads (Meta): posts and threads, content plan, replies, hook analysis, profile, publishing.
- By: Serge Bulaev
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence); paid third-party services depending on use
8 skills for TikTok: analyse public accounts and posts, spot what works for competitors, write posts and replies, then publish after your approval.
- By: Sergey Bulaev
- Works in: Claude, OpenAI Codex
- Cost: Free (MIT licence); paid third-party services depending on use
Skill that rewrites your X posts based on the public code of X's recommendation algorithm.
- By: ComposioHQ
- Works in: Claude
- Cost: Free
65 skills based on reference books: One Page Marketing, StoryBrand, Obviously Awesome, Made to Stick, Predictable Revenue, CRO, Lean Analytics...
- By: Wondel.ai
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence)
9 skills for X: analyse public accounts and posts, spot what works for competitors, write posts and replies, then publish after your approval.
- By: Sergey Bulaev
- Works in: Claude, OpenAI Codex
- Cost: Free (MIT licence); paid third-party services depending on use
11 YouTube skills in French: videos that work in your niche, title and thumbnail, script with hooks, Shorts from a long video, cuts, chapters, comment replies.
- By: Antoine Blanco
- Works in: Claude
- Cost: Free (MIT licence)
Skills and MCP server for a YouTube channel: private channel stats, video ideas, optimised titles, descriptions and tags, growth strategy without ads.
- By: Aditya Sharma
- Works in: Claude, OpenAI Codex, Cursor, Gemini CLI
- Cost: Free (MIT licence)
9 YouTube skills: titles, descriptions, 30-second hooks, community posts, thumbnail brief, comment reading and publishing.
- By: Serge Bulaev
- Works in: Claude, OpenAI Codex, Cursor
- Cost: Free (MIT licence); paid third-party services depending on use