Free MCP & Claude Code Tools
Utilities built for the problems we kept seeing on r/ClaudeAI, HN, and GitHub. No login, no install, no upsell. Every tool that takes sensitive input runs in your browser — your data stays on your machine.
Tools
MCP Config Converter
Convert MCP server configs between Claude Desktop, Cursor, VS Code, Codex CLI, and 4 more.
Pick a source format, paste your config, get the equivalent in any of 8 target formats. Handles JSON ↔ TOML for Codex CLI, the mcpServers→servers rename for VS Code, type:'stdio' for Cursor, and serverUrl/httpUrl aliases for Windsurf/Gemini. Five priority migration pairs have dedicated pages with conversion notes.
Claude Desktop Config Validator
Paste your claude_desktop_config.json. Find why MCP servers aren't loading.
Diagnostic for the silent-fail problem: 12 deterministic checks for JSON syntax, MSIX path mismatch, env-var leaks, Windows path issues, schema validation. Runs entirely in your browser — your config never leaves the page.
Cursor MCP Config Validator
Paste your Cursor mcp.json. Validate the type:"stdio" field and structural shape.
10+ checks against Cursor's documented schema (cursor.com/docs/context/mcp): JSON syntax, top-level mcpServers shape, stdio type field, transport conflicts, env-var leaks, insecure URLs. Runs in your browser.
VS Code MCP Config Validator
Paste your .vscode/mcp.json. Catches the 'servers' (not 'mcpServers') gotcha.
Validates VS Code Copilot's MCP schema: 'servers' top-level key, required type enum (stdio/http/sse), per-transport field requirements, and standard JSON syntax checks. Source: code.visualstudio.com/docs/copilot/chat/mcp-servers.
Claude Code .mcp.json Validator
Paste your .mcp.json (project), ~/.claude.json, or managed-mcp.json.
Validates Anthropic's Claude Code MCP schema across all three scopes (project / user / managed): mcpServers shape, type enum, OAuth blocks, HTTP/SSE/stdio transports. Source: code.claude.com/docs/en/mcp.
Codex CLI config.toml Validator
Paste your ~/.codex/config.toml. The only TOML-based MCP client.
Validates OpenAI's Codex CLI TOML schema: [mcp_servers.X] tables, snake_case fields (startup_timeout_sec, bearer_token_env_var, http_headers), and TOML syntax via an inline parser. Source: developers.openai.com/codex/config-reference.
Windsurf MCP Config Validator
Paste your ~/.codeium/windsurf/mcp_config.json.
Validates Windsurf's mcpServers schema with its serverUrl/url alias and ${env:VAR} / ${file:...} interpolation. Catches dual-URL collisions and standard structural issues. Source: docs.windsurf.com/windsurf/cascade/mcp.
Gemini CLI MCP Config Validator
Paste your ~/.gemini/settings.json. Catches httpUrl vs url confusion.
Validates Google's Gemini CLI MCP section with its precedence rule (httpUrl > url > command), timeout default, and trust flag. Plus standard mcpServers structural checks. Source: github.com/google-gemini/gemini-cli docs.
Cline MCP Config Validator
Paste your cline_mcp_settings.json. Validates the disabled and alwaysAllow extensions.
Validates Cline's mcpServers schema with its two extension fields (disabled bool, alwaysAllow string array) and standard structural checks. Source: docs.cline.bot/mcp/configuring-mcp-servers.
MCP & Skill Recommender
What's the right MCP server or Claude Skill for your task?
Pick your role and task — get 5 hand-ranked picks from our catalog of 2,000+ MCP servers and 8,600+ skills with reasoning, install commands, and links to the full record.
MCP Server Debugger
Paste a URL or stdio command. See why your MCP isn't responding.
Probes the full handshake — DNS, TLS, OPTIONS/CORS, MCP initialize, capability negotiation, tools/list, schema validation, sample tool call — and returns a verdict with the exact failure reason and copy-paste fix.
Subscription vs API Cost Estimator
Should you be on Pro, Max5, Max20, or API? Calculate the break-even.
Drop in your usage.jsonl or describe your typical day — see your effective cost on each plan and get a recommendation. No login. Doesn't transmit your transcripts.
CLAUDE.md Template Generator
Pick your stack. Get a token-budgeted CLAUDE.md that follows the rules every viral repo uses.
Stack-aware templates (Python, Next.js, Rust, Go, TypeScript) with built-in lint for >1k token bloat, missing test commands, and contradictory rules.
Frequently asked
Are these tools really free?
Yes — every tool on /tools/ is free, no login required, no email gate. We monetize the directory itself; the tools exist to help builders and to bring traffic to mcp.directory. Built-with-care, not built-to-upsell.
Do you store my config or transcripts?
No. Tools that take sensitive input (claude_desktop_config.json, usage.jsonl, transcripts) run entirely client-side in your browser. Your data never leaves your machine. Tools that take public input (GitHub URLs, MCP server slugs) only fetch public data on your behalf.
Can I use these tools without an Anthropic API key?
Most tools don't need one. The Skill Activation Tester (in development) uses our own API key on your behalf, with rate limits to prevent abuse. The token counter and config validator use public tokenizers and JSON schema; no API key required.
Is there an MCP server that exposes these tools?
Yes — @mcp-directory/recommender ships as an MCP server you can install in Claude Code, Cursor, Cline, or any MCP client. It exposes our directory's search and audit functions as tools. Available via npm.
Can I request a tool that doesn't exist yet?
Yes — open an issue on our GitHub or email us. We prioritize tools where (a) demand is verified by user search behavior or community discussion and (b) we have unique data to offer (catalog, install configs, scoring methodology). Most requested tools that get built ship within 14 days.
Looking for something else?
Browse the full directory: 2,000+ MCP servers, 8,600+ Claude Skills, or read the blog for deep-dives.