Free AI tools
Free MCP servers, Claude skills and Claude Code plugins.
Fifteen tools we built and run to make AI assistants exact and safe: five MCP servers that give assistants live, exact answers, five Claude skills that do a whole job and check their own work, and five Claude Code plugins that guard against costly mistakes and add proven workflows. All free, none need an account.
01Find the right one
Which tool for which job.
Fifteen tools in four areas, each for one job. Start from the job.
Search and AI visibility
See a site the way search engines and AI assistants do, then fix it.
Domains, dates, time and color
Facts an assistant should look up, never guess.
Writing and data
Prose, release notes and spreadsheets, checked by a script.
Code, commits and safety
Guard rails and reviews inside Claude Code.
02Real output
Every tool, in real use.
Pick a tool to see a screen from a real run against live sites, calendars, files and commands. Open a tool for the rest.
Which AI crawlers robots.txt lets in, with the exact rule
Open CrawlView03MCP servers
Free MCP servers that give your AI assistant exact answers.
Five free MCP servers that give Claude, Cursor, VS Code and other MCP clients tools they cannot fake: an SEO and AI crawler checker, DNS and email authentication checks, a business days calculator, a time zone converter and a WCAG color contrast checker. Each one is a single address you add to your assistant. No account, no API key, nothing to install.
CrawlViewMCP serverSee any web page the way search engines and AI crawlers see it.
DomainProbeMCP serverDNS, email authentication, certificates and security headers for any domain.
DayCountMCP serverPublic holidays and exact business-day maths for about 200 countries.
HourLineMCP serverTime zone conversions, meeting overlaps and daylight saving changes, done exactly.
HueProofMCP serverColor contrast, accessible fixes, palettes and color-blindness checks.04Claude skills
Claude skills that do the job, and check their own work.
Five Claude skills, which Anthropic calls Agent Skills, for Claude Code and the Claude apps. Each is a folder of instructions plus a script that does the part a model should not do by eye: scanning prose for templated phrases, validating schema markup, collecting a site’s pages for llms.txt, grouping git history into release notes, or profiling every row of a CSV.
PlainSpokenClaude skillEdits prose so it reads like a person wrote it, not a template.
SchemaWrightClaude skillWrites correct JSON-LD structured data and validates it against Google’s rules.
SignPostClaude skillBuilds a curated llms.txt so AI assistants find a site’s best pages.
ShipNotesClaude skillTurns git history into release notes customers want to read.
ColumnistClaude skillProfiles a CSV or spreadsheet export before you trust it, then cleans it safely.05Claude Code plugins
Claude Code plugins for safer, faster work.
Five Claude Code plugins, installed from one marketplace. Two are Claude Code hooks that stop costly mistakes before they happen. Three add whole workflows: commit messages and pull requests in your repository’s style, technical SEO audits traced to the line that fixes them, and AI code review by parallel specialists.
FailSafeClaude Code pluginStops destructive shell commands before they run.
KeySafeClaude Code pluginKeeps API keys, tokens and passwords out of your code and commits.
CommitWiseClaude Code pluginCommit messages and pull requests in your repository’s own style.
SearchReadyClaude Code pluginSEO and AI-search audits that trace every issue to the line that fixes it.
CrossCheckClaude Code pluginSecurity, accessibility and performance reviewers for every change.Built to order
Need an MCP server or plugin for your own product?
We design, build and host MCP servers, skills and plugins that connect AI assistants to your systems and data, the same way we built these.