# ToolDirectory.AI > ToolDirectory.AI is a curated registry of AI tools published as a quarterly editorial publication. Currently Vol. 4 · Issue 21 (last reviewed 2026-06-27). Every listing is hand-reviewed, dated, and re-tested by our editors — pricing, model versions, and lifecycle status are kept current. Retired and acquired tools live in the Graveyard so the catalog reflects what's actually shipping. ## Browse - [Top 100 tools](https://tooldirectory.ai/top-100-ai-tools): The flagship editorial list, grouped into four tiers (flagships, category leaders, rising stars, hidden gems). Re-checked quarterly. - [All categories](https://tooldirectory.ai/top-ai-categories): Browse the full catalog organized by use case. - [Current issue](https://tooldirectory.ai/best-ai-collections): Editorial collections, latest issue at the top. Themed, cross-category cuts. - [The Graveyard](https://tooldirectory.ai/ai-graveyard): AI tools that shut down, were acquired and sunset, or were acquired and kept shipping. Hand-reviewed and dated. - [Research](https://tooldirectory.ai/research): Original data reports on the AI tool landscape, including AI tool mortality. Free to cite (CC BY 4.0). - [Glossary](https://tooldirectory.ai/glossary): Plain-English definitions for AI terms (RAG, MCP, embeddings, agents, etc.). ## Latest collections - [Best AI Genogram Makers (2026)](https://tooldirectory.ai/best-ai-collections/best-ai-genogram-makers): The best AI genogram makers in 2026, compared: GenogramAI, Creately, GenoPro, and MyMap.AI — for clinical accuracy, team collaboration, and free drafts. - [Best AI Image Editors & Upscalers (2026)](https://tooldirectory.ai/best-ai-collections/best-ai-image-editors-and-upscalers-2026): The best AI image editors and upscalers in 2026, ranked: Topaz Photo AI, Magnific, Remove.bg, PhotoRoom and more for upscaling, retouching, background removal. - [Best AI Search Engines (2026)](https://tooldirectory.ai/best-ai-collections/best-ai-search-engines-2026): The best AI search engines in 2026, ranked. Compare Perplexity, You.com, Kagi, Genspark and more answer engines for everyday, research, and developer search. - [Best AI Agents (2026)](https://tooldirectory.ai/best-ai-collections/best-ai-agents-2026): The best AI agents in 2026, ranked. Lindy AI leads for no-code work, with Manus, LangChain, CrewAI & more for autonomy and building your own. - [Best NSFW AI Chatbots in 2026](https://tooldirectory.ai/best-ai-collections/best-nsfw-ai-chatbots-2026): The 4 best NSFW AI chatbots in 2026 — Janitor AI, SpicyChat, CrushOn.ai and NSFW Character AI — uncensored character chat and roleplay compared. 18+. ## MCP server - [MCP endpoint](https://tooldirectory.ai/api/mcp): Public, read-only Model Context Protocol server (streamable-http JSON-RPC). Tools: search_tools, get_tool, check_tool_status (alive/acquired/deceased + cause, date, and live alternatives), find_alternatives, compare_tools, list_tools. Listed in the official MCP Registry as ai.tooldirectory/catalog. - [MCP docs](https://tooldirectory.ai/mcp): How to connect the server and a full tool reference. ## Research & data - [AI Tool Mortality report](https://tooldirectory.ai/research/ai-tool-mortality): Original research — how many tracked AI tools have shut down or been acquired, when, why, and who is buying. Updated continuously. - [Catalog feed (JSON)](https://tooldirectory.ai/feed/catalog.json): Every active tool as structured JSON — name, URL, pricing, rating, categories. - [Graveyard dataset (JSON)](https://tooldirectory.ai/feed/graveyard.json): Every retired tool with cause, date, and acquirer. CC BY 4.0. - [Mortality report (Markdown)](https://tooldirectory.ai/feed/ai-tool-mortality.md): Token-light Markdown version of the report for LLM context. ## Methodology - [Editorial FAQ](https://tooldirectory.ai/faq): How we curate, how listings work, submission rules, pricing, and editorial review cadence. ## Category files Per-category slices of the full content dump — same tool blocks, one category per file, sized for single-fetch ingestion: - [AI Agents](https://tooldirectory.ai/llms-full/ai-agents.txt) - [AI Art & Image Creation](https://tooldirectory.ai/llms-full/ai-art-and-image-creation.txt) - [AI Audio Creation](https://tooldirectory.ai/llms-full/ai-audio-creation.txt) - [AI Content Writing](https://tooldirectory.ai/llms-full/ai-content-writing.txt) - [AI Infrastructure](https://tooldirectory.ai/llms-full/ai-infrastructure.txt) - [AI SDRs](https://tooldirectory.ai/llms-full/ai-sdrs.txt) - [AI/ML Models](https://tooldirectory.ai/llms-full/ai-ml-models.txt) - [Automotive](https://tooldirectory.ai/llms-full/automotive.txt) - [BI & Analytics](https://tooldirectory.ai/llms-full/bi-and-analytics.txt) - [Coding Assistants](https://tooldirectory.ai/llms-full/coding-assistants.txt) - [Conversation Intelligence](https://tooldirectory.ai/llms-full/conversation-intelligence.txt) - [Customer Support](https://tooldirectory.ai/llms-full/customer-support.txt) - [Developer Tools](https://tooldirectory.ai/llms-full/developer-tools.txt) - [E-Commerce](https://tooldirectory.ai/llms-full/e-commerce.txt) - [Education & Learning](https://tooldirectory.ai/llms-full/education-and-learning.txt) - [Engineering & Simulation](https://tooldirectory.ai/llms-full/engineering-and-simulation.txt) - [Finance & Trading](https://tooldirectory.ai/llms-full/finance-and-trading.txt) - [Fitness & Lifestyle](https://tooldirectory.ai/llms-full/fitness-and-lifestyle.txt) - [Gaming & 3D Modeling](https://tooldirectory.ai/llms-full/gaming-and-3-d-modeling.txt) - [HR & Job Search](https://tooldirectory.ai/llms-full/hr-and-job-search.txt) - [Healthcare](https://tooldirectory.ai/llms-full/healthcare.txt) - [Insurance](https://tooldirectory.ai/llms-full/insurance.txt) - [LLM Gateways & Serving](https://tooldirectory.ai/llms-full/llm-gateways-serving.txt) - [Legal Assistant](https://tooldirectory.ai/llms-full/legal-assistant.txt) - [MCP Servers](https://tooldirectory.ai/llms-full/mcp-servers.txt) - [Marketing & SEO](https://tooldirectory.ai/llms-full/marketing-and-seo.txt) - [Music Creation](https://tooldirectory.ai/llms-full/music-creation.txt) - [NSFW](https://tooldirectory.ai/llms-full/nsfw-ai-tools.txt) - [No-Code / Low-Code](https://tooldirectory.ai/llms-full/no-code-low-code.txt) - [Productivity](https://tooldirectory.ai/llms-full/productivity.txt) - [Real Estate](https://tooldirectory.ai/llms-full/real-estate.txt) - [Sales & RevOps](https://tooldirectory.ai/llms-full/sales-and-rev-ops.txt) - [Science & Research](https://tooldirectory.ai/llms-full/science-and-research.txt) - [Security & Governance](https://tooldirectory.ai/llms-full/security-and-governance.txt) - [Social Media Management](https://tooldirectory.ai/llms-full/social-media-management.txt) - [Vector DBs & RAG](https://tooldirectory.ai/llms-full/vector-databases-rag.txt) - [Video Creation](https://tooldirectory.ai/llms-full/video-creation.txt) - [Voice AI](https://tooldirectory.ai/llms-full/voice-ai.txt) - [Workflow Automation](https://tooldirectory.ai/llms-full/workflow-automation.txt) ## Optional - [Full content dump](https://tooldirectory.ai/llms-full.txt): Per-tool name, URL, pricing, categories, and full description for every active listing. Intended for AI dev-tool grounding (Cursor, Continue, Aider) and AI-search ingestion. Large (multi-MB) — fetch-limited clients should use the per-category files above. - [MCP server](https://tooldirectory.ai/mcp): Public Model Context Protocol endpoint at https://tooldirectory.ai/api/mcp — let an agent search the catalog, compare tools, find alternatives, and check whether a tool is still alive, live and mid-task. No key required.