unpkg.ai
AI-powered service that generates JavaScript modules with TypeScript signatures via URL for rapid prototyping.
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What is unpkg.ai?
unpkg.ai is an AI-powered ESM (ECMAScript Module) generation service that creates JavaScript modules on-demand using large language models. Instead of installing npm packages, developers can import custom-generated modules directly via URL by specifying the function signature with TypeScript-style type definitions in the URL path.
The tool uses a simple URL pattern: /esm/{url-encoded-prompt}.js where the prompt describes the function you need including its parameters, types, and return type. For example, you can request a formatCurrency function by navigating to https://unpkg.ai/esm/formatCurrency(amount:number,currency?:string):string.js and it will generate a working module with that exact function.
Key features include zero friction access (no signup, no API keys, no authentication required), support for multiple AI models (gpt-4, claude-3), deterministic output via seed parameter, and perfect use cases for top-down vibe coding, dynamic plugin systems, and prototyping. The service generates complete, importable ES modules with full type definitions.
This tool is ideal for developers who want quick prototyping without npm installations, builders of systems with dynamic plugins, developers practicing
unpkg.ai pricing
Pricing model: Freemium
Free tier with zero friction - no signup, no API keys, no authentication required. The service is completely free to use with no documented paid plans. Optional parameters like model (gpt-4, claude-3) and seed are available at no cost.
unpkg.ai pros
- No signup required to use
- No API keys needed
- No authentication required
- Generates modules on-demand instantly
- Supports TypeScript-style type definitions
- Multiple AI models available (gpt-4, claude-3)
- Deterministic output with seed parameter
- Perfect for vibe coding workflow
- Ideal for dynamic plugin systems
- Creates complete playable games like Minesweeper
- Generates rich text editors with full features
- Creates interactive dashboards with charts
- Builds color palette generators
- Creates password generators with strength feedback
- URL-based module import (no npm install)
unpkg.ai cons
- No documented paid plans or pricing tiers
- Relies on external LLMs for generation
- No uptime or reliability guarantees
- Module quality depends on AI output
- No official support channel documented
- Limited to ESM module format only
- URL-encoded prompts can be complex
- No caching documented for generated modules
Frequently asked questions about unpkg.ai
What is unpkg.ai?
unpkg.ai is an AI-powered ESM module generation service that creates JavaScript modules on-demand using LLMs. You can import custom functions directly via URL by specifying the function signature with TypeScript-style type definitions.
Do I need to sign up or create an account?
No, unpkg.ai has zero friction - no signup, no API keys, and no authentication is required to use the service.
How do I import a module from unpkg.ai?
Use the URL pattern /esm/{url-encoded-prompt}.js. For example: import { formatCurrency } from 'https://unpkg.ai/esm/formatCurrency(amount:number,currency?:string):string.js'
What format should my function prompt be in?
Use the format: functionName(param1:type1,param2?:type2):ReturnType. Optional parameters use ? and return types are specified after the colon. Include full TypeScript-style type definitions.
Can I control which AI model is used?
Yes, you can specify the model parameter with values like gpt-4 or claude-3. This is an optional query parameter.
How do I get deterministic/reproducible output?
Use the seed parameter with a numeric value (e.g., seed=12345) to get deterministic output from the AI model.
What types of modules can I generate?
You can generate any JavaScript module including utility functions (currency formatting, tip calculation), password generators, color palette generators, rich text editors, interactive dashboards, and complete games like Minesweeper with UI.
Is unpkg.ai free to use?
Yes, the service is completely free with no signup required. There are no documented paid plans or usage limits.
What API endpoints does unpkg.ai provide?
The service provides GET /esm/{prompt}.js for generating ES modules, GET /health for health checks, and GET /llms.txt for LLM-friendly documentation.
Can I use unpkg.ai for production applications?
unpkg.ai is perfect for top-down vibe coding and systems with dynamic plugins. However, like free best-effort services, it may not provide uptime guarantees for mission-critical production use.