# AI tools for “Master Key” 118 matching tools; showing 24, ranked by relevance. Filters: `group=coding-development` | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [Kie.ai](https://openaitools.app/tool/kie-ai-affordable-secure-deepseek-r1-api) | 2,275,553 | -22.4% | Pay-as-you-go | One API key for video, image, music, and chat models | semantic match | [.md](https://openaitools.app/tool/kie-ai-affordable-secure-deepseek-r1-api.md) | | 2 | [OpenRouter](https://openaitools.app/tool/openrouter-ai) | 19,941,437 | -6.2% | Paid | One API key for hundreds of AI models from every major provider | semantic match | [.md](https://openaitools.app/tool/openrouter-ai.md) | | 3 | [Cursor](https://openaitools.app/tool/cursor) | 23,297,751 | +8.4% | Freemium | The AI coding agent for building ambitious software | semantic match | [.md](https://openaitools.app/tool/cursor.md) | | 4 | [APIMaster](https://openaitools.app/tool/apimaster) | 210,182 | +46.3% | Paid | One OpenAI-compatible key for discounted GPT, Claude and Gemini access | semantic match | [.md](https://openaitools.app/tool/apimaster.md) | | 5 | [Flatkey](https://openaitools.app/tool/flatkey-ai) | 49,134 | -40.8% | Paid, Contact for Pricing | One API key for frontier models, 1,000+ AI tools, and one invoice | semantic match | [.md](https://openaitools.app/tool/flatkey-ai.md) | | 6 | [CometAPI](https://openaitools.app/tool/cometapi) | 602,966 | +49.7% | Pay-as-you-go (credits) | One OpenAI-compatible API key for 500+ AI models | semantic match | [.md](https://openaitools.app/tool/cometapi.md) | | 7 | [Treg](https://openaitools.app/tool/treg) | 452,935 | +223.4% | Freemium | One key for 4,100+ agent tools, pay per call | semantic match | [.md](https://openaitools.app/tool/treg.md) | | 8 | [PoYo.AI](https://openaitools.app/tool/poyo-ai) | 126,258 | -16.2% | Free Trial, Paid | One API key for 500+ image, video, music, chat, and 3D models | semantic match | [.md](https://openaitools.app/tool/poyo-ai.md) | | 9 | [ApiPass](https://openaitools.app/tool/apipass-api-marketplace) | 64,237 | -8.3% | Pay-per-use / Usage-based credits | One API key for 180+ leading AI models at a fraction of official pricing | semantic match | [.md](https://openaitools.app/tool/apipass-api-marketplace.md) | | 10 | [GPTunneL](https://openaitools.app/tool/gptunnel) | 1,272,003 | +11.4% | Freemium, Pay-as-you-go | One subscription hub for 200+ AI models without a VPN | semantic match | [.md](https://openaitools.app/tool/gptunnel.md) | | 11 | [Wokey](https://openaitools.app/tool/wokey) | 55,092 | +202.2% | Paid | One verifiable API key for Claude, GPT, Kimi and Grok at a fraction of list price | semantic match | [.md](https://openaitools.app/tool/wokey.md) | | 12 | [Portkey](https://openaitools.app/tool/portkey-ai) | 195,650 | -9.4% | Freemium, Paid, Contact for Pricing | AI gateway, observability and guardrails for production LLM apps | semantic match | [.md](https://openaitools.app/tool/portkey-ai.md) | | 13 | [BeatAPI](https://openaitools.app/tool/beatapi-ai-model-data-web-apis-for-agents) | 99,987 | +1,012.7% | Freemium | One API key for 70+ AI models, 1,000+ data APIs and web tools | semantic match | [.md](https://openaitools.app/tool/beatapi-ai-model-data-web-apis-for-agents.md) | | 14 | [AIsa](https://openaitools.app/tool/aisa) | 89,162 | -10.3% | Freemium | One key, one schema, 6,000+ APIs for your AI agents | semantic match | [.md](https://openaitools.app/tool/aisa.md) | | 15 | [AI/ML API](https://openaitools.app/tool/ai-ml-api) | 232,946 | -20.1% | Pay-as-you-go credits (free to start); enterprise custom pricing on request | One universal API for 500+ AI models and 1,000+ agentic tools | semantic match | [.md](https://openaitools.app/tool/ai-ml-api.md) | | 16 | [APIDot](https://openaitools.app/tool/apidot) | 10,487 | -33% | Freemium, Paid | One API key for premium image, video, music, chat and 3D generation models | semantic match | [.md](https://openaitools.app/tool/apidot.md) | | 17 | [Loudly](https://openaitools.app/tool/loudly-com) | 235,087 | -3% | Freemium, Free Trial | Rights-cleared AI music generation, remixing and release in one workflow | keywords 62% | [.md](https://openaitools.app/tool/loudly-com.md) | | 18 | [ChatGPT Shortcut](https://openaitools.app/tool/chatgpt-shortcut) | 84,028 | -9.9% | Free | Free, community-curated AI prompt library for ChatGPT, Claude and Gemini | semantic match | [.md](https://openaitools.app/tool/chatgpt-shortcut.md) | | 19 | [KeyAPI.ai](https://openaitools.app/tool/keyapi-ai) | 18,041 | -32.4% | Freemium, Paid, Enterprise | One API key for social data across 20+ platforms | semantic match | [.md](https://openaitools.app/tool/keyapi-ai.md) | | 20 | [ExcelMaster.ai](https://openaitools.app/tool/excelmaster-ai) | 46,640 | +2% | Freemium, Free Trial | An autonomous AI agent that writes, runs, and verifies Excel formulas, VBA, and Python inside your workbook | semantic match | [.md](https://openaitools.app/tool/excelmaster-ai.md) | | 21 | [supermemory](https://openaitools.app/tool/supermemory-1) | 156,579 | -7.7% | Contact for Pricing | A memory and continual-learning engine that gives any AI agent persistent context | semantic match | [.md](https://openaitools.app/tool/supermemory-1.md) | | 22 | [ToAPIs](https://openaitools.app/tool/toapis) | 14,757 | -51.4% | Free Trial, Paid | One OpenAI-compatible key for 200+ text, image and video models | semantic match | [.md](https://openaitools.app/tool/toapis.md) | | 23 | [Claude](https://openaitools.app/tool/claude-3) | 18,695,610 | +9.1% | Freemium, Contact for Pricing | Anthropic's AI assistant for real work, from chat to agents | semantic match | [.md](https://openaitools.app/tool/claude-3.md) | | 24 | [Prem](https://openaitools.app/tool/prem) | 45,892 | +4.3% | Contact for Pricing | Frontier sovereign AI — verifiable, private, compounding | semantic match | [.md](https://openaitools.app/tool/prem.md) | Page 1 of 5 · [Next page →](https://openaitools.app/index.md?q=Master+Key&group=coding-development&page=2) For programmatic access use `https://openaitools.app/api/tools?q=…` or MCP `https://openaitools.app/api/mcp`. --- Source: https://openaitools.app/?q=Master%20Key More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)