Toolcraft is an open-source starter kit and UI library for building custom design apps with AI. Use it to\ create branded asset generators, explore new visual styles, and turn repetitive design tasks into reusable tools. 100% free and MIT-licensed.
It works with any AI agent (Codex, Claude, Cursor).
Don't ask AI to design for you - ask it to build you a tool, so you can design better and faster.
When other software doesn't give you enough freedom to experiment or make you efficient at a specific task, Toolcraft gives you the ability to create your own solution for your personal needs and solve creative tasks faster.
Whether you're working on branding, designing bento cards, or working on animation, you can use Toolcraft to build a custom tool and design what you have in mind more efficiently.
But don't blindly think of it as a replacement for other software. We use it when we face a specific problem that other software simply won't let us solve the way we want.
If you want to see exactly how we use it in commercial projects, take a look at our case studies page with lots of examples.
FEATURES
Starter Kit: Provides a foundation and UI library to help you build custom design apps from scratch.
AI Integration: Works seamlessly with AI agents like Claude or Cursor to generate your custom design tools.
Custom Solutions: Lets you build specialized tools for tasks that standard design software can't handle.
Efficiency: Automates repetitive design work so you can finish projects much faster.
Creative Freedom: Gives you full control to experiment with unique visual styles and custom branding.
Open Source: Offers a completely free, MIT-licensed framework that you can modify as you please.
Reusable Workflows: Allows you to turn complex design processes into reusable tools for future use.
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Modellix is a unified AI model API platform that aggregates the world's leading generative models — including Google Veo 3.1, GPT Image, Grok Imagine, Seedream 5.0, Seedance 2.0, Kling V3, Wan 2.7, Hailuo 2.3, Vidu Q3, PixVerse V6, and more — into a single API key and billing dashboard. Developers integrate once and access all models without multi-vendor management. Creators test models directly in browser Playground, no code required. The same key also opens the Modellix LLM gateway, with OpenAI- and Anthropic-compatible access to language models from OpenAI, Anthropic, Google, DeepSeek, Qwen, Moonshot, xAI, and ZAI. Backed by Aurora Mobile (NASDAQ: JG) with SOC 2 Type 2, ISO 27001, and ISO 27701 certifications and 15+ years of developer infrastructure experience.
Key Features
- One API Key for Everything — One key covers both media generation and the LLM gateway; every media model shares the same flat request structure, so adding or switching models needs no integration rewrite
- LLM Gateway — Call OpenAI, Anthropic, Google, DeepSeek, Qwen, Moonshot, xAI, and ZAI language models over OpenAI- and Anthropic-compatible endpoints; Cursor, Claude Code, Codex, and standard SDKs connect with a base URL override
- Browser Playground — Full-featured playground on every model page; test, compare, and generate without code
- AI Prompt Optimizer — Built-in tool that refines and expands prompts for better generation results
- Transparent Pay-As-You-Go Pricing — Every model's price visible before you call; no subscriptions, no hidden fees
- Complete Call Logs — Every request traceable: inputs, outputs, and cost per call for debugging and billing
- Agent Skill & CLI — Integrate into AI agents, low-code workflows, or automate from the terminal
- Enterprise-Grade Reliability — SOC 2 Type 2, ISO 27001 & ISO 27701 certified; backed by Aurora Mobile (NASDAQ: JG)
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