A growing collection of free tools and skills for people building with Claude Code, validators, auditors, and generators. No signup, no cost. Made by the team behind the AgentsKit kits.
Turn your ccusage stats into a shareable flex
Paste your ccusage output and get a Wrapped-style card: total tokens burned, the $ value at API prices, your favorite model, longest streak, and biggest day. Download the PNG and share it. Runs 100% in your browser.
Open tool →Score your Claude Code config out of 100
Paste your CLAUDE.md and get a graded score with exact fixes: token budget, vague rules, linter duplication, progressive disclosure, and missing essentials. Runs 100% in your browser.
Open tool →Pro vs Max vs API, which actually pays off?
Enter your daily Claude Code usage and instantly see the cheapest plan that fits, what your usage is worth at API prices, and when you'd hit each plan's limits.
Open tool →AGENTS.md ⇄ CLAUDE.md ⇄ .cursorrules in one click
Convert between AGENTS.md, CLAUDE.md, .cursorrules, Cursor .mdc rules, Copilot instructions, and .windsurfrules, correct conventions, imports, and placement notes included.
Open tool →Describe a role, get a valid .claude/agents file
Build a Claude Code subagent in a minute: name, trigger-focused description, scoped tools, model, and a structured system prompt, with presets for reviewer, debugger, and test runner.
Open tool →Turn your most-repeated prompt into a /command
Build valid .claude/commands files with frontmatter, $ARGUMENTS, live bash context lines, and allowed-tools, with /commit, /review-pr, and /explain presets and a live preview.
Open tool →Valid Claude Code hooks without hand-writing JSON
Visual builder for Claude Code hooks: pick an event, matcher, and command and get valid settings.json, with presets for auto-format, file protection, bash logging, and notifications.
Open tool →Fix your .mcp.json in seconds
Paste your .mcp.json or claude_desktop_config.json and catch the exact errors that make MCP servers silently vanish, wrong keys, missing fields, trailing commas, placeholder env values.
Open tool →Tokens and cost for any text, instantly
Paste text or code and get a calibrated token estimate plus the price on Claude Opus, Sonnet, and Haiku, input, output, and cache rates, scaled to any number of calls.
Open tool →Lint a Claude skill's format in seconds
Paste a SKILL.md and instantly check the YAML frontmatter, name and description rules, body length, and when-to-use structure, with the exact fixes. Runs 100% in your browser.
Open tool →Scan your site for the holes that get sites breached
A free Claude skill that audits your own website or codebase for missing HTTPS, exposed files, hardcoded secrets, and vulnerable dependencies, then hands you a prioritized, plain-English fix-it report.
Open tool →Editorial roundups of the Claude ecosystem, the tools, connectors, and setups that earn their place, and the ones to skip.
The 2026 stack for coding with Claude
Claude Code, IDE integrations, AI editors, and the extensions that matter, how the pieces fit and what to install first.
Read the guide →Give Claude hands: the connectors worth installing
What MCP is, the servers that earn a permanent spot (GitHub, Postgres, browser automation, and more), and how to add them safely.
Read the guide →Beyond chat: the features people miss
Projects, Artifacts, connectors, skills, and the workflow setups that turn Claude from a chat window into a working system.
Read the guide →The tools above are free forever. The AgentsKit kits give you a whole library, 89 agents, 122 skills, and 181 slash commands you drop into any project with one command.
Battle-tested Claude skills & workflows for builders.
Turn Claude into your growth team.