Free tools
Free tools for AI skills & MCP
Handy, no-signup utilities for working with AI agent skills and the Model Context Protocol. Everything runs in your browser — nothing is sent to any server.
AI Skill Builder
BuilderCompose portable SKILL.md files with a live preview, then download or copy.
Open toolMCP Config Generator
GeneratorGenerate the mcpServers config for Claude Desktop, Cursor, VS Code, or Claude Code.
Open toolSKILL.md Validator
ValidatorCheck a SKILL.md for valid frontmatter, required fields, and common mistakes.
Open toolToken & Context Estimator
EstimatorEstimate tokens for a prompt or skill and how much of a context window it fills.
Open toolMCP Servers Directory
DirectoryBrowse notable MCP servers and what each one does.
Open toolFrom one skill to your whole team
These tools are free forever. When you're ready to store, review, and sync skills across your team, SkillInvoke handles the rest.