A CLI-based utility that generates precise CORS middleware and configurations from plain English descriptions of your tech stack.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install cors-gen
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install cors-gen using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is CORS Generator (cors-gen)?
CORS Generator (cors-gen) is a purpose-built tool designed to solve one of the most persistent headaches in modern web development: Cross-Origin Resource Sharing errors. By providing a simple interface to describe your frontend and backend architecture, the tool generates the exact code required to allow secure communication between services. This skill is a vital addition to the Openclaw Skills ecosystem for developers working with decoupled architectures.
The tool eliminates the guesswork involved in configuring preflight requests, allowed headers, and credential handling. Whether you are working locally or deploying to production, this utility ensures your security headers are robust and your applications remain functional across different domains.
CORS Generator (cors-gen) Use Cases
- Resolving CORS blocked errors appearing in the browser console during API integration.
- Generating secure production configurations for React apps hosted on Vercel communicating with APIs on Railway.
- Configuring multi-origin access for complex environments involving admin and client subdomains.
- Setting up cookie-based authentication and credential sharing between different origins.
- Rapidly scaffolding middleware for new API endpoints in Express, Fastify, or Next.js.
How CORS Generator (cors-gen) Works
- The developer provides a natural language description of their frontend and backend setup via the CLI.
- The utility parses the requirements, identifying specific origins, frameworks, and security needs.
- It leverages an LLM to generate the corresponding configuration code or middleware tailored to the specified framework.
- The output provides a ready-to-use code block that includes necessary headers, methods, and credential settings.
- Developers can immediately apply this to their codebase to restore cross-origin functionality within the Openclaw Skills workflow.
CORS Generator (cors-gen) Setup
The CORS Generator requires Node.js 18 or higher. No permanent installation is required as it can be run directly via npx.
# Set your API key for processing
export OPENAI_API_KEY='your_api_key_here'
# Generate a configuration for local development
npx ai-cors "frontend on localhost:3000, API on localhost:8080"
# Generate a production setup for specific domains
npx ai-cors "React app on vercel, Express API on Railway"
CORS Generator (cors-gen) Data Schema & Taxonomy
The skill processes input parameters and generates structured code outputs as follows:
| Attribute | Description |
|---|---|
| Input Source | Plain text string describing the stack (origins and frameworks). |
| Output Format | Framework-specific code snippets (JavaScript, TypeScript, etc.). |
| Security Headers | Automatically configures Access-Control-Allow-Origin, Methods, and Headers. |
| Credentials | Handles boolean logic for 'Access-Control-Allow-Credentials' based on user input. |
| Environment | Operates statelessly, requiring only an OpenAI API key for generation logic. |
CORS Generator (cors-gen) Advanced Features
- Smart framework detection for Express, Fastify, and Next.js environments.
- Support for complex multi-origin whitelisting to avoid using dangerous wildcards in production.
- Automatic preflight request handling logic generation.
- Deep integration with Openclaw Skills for automated dev-environment troubleshooting.
- Context-aware suggestions for specific cloud providers like Vercel, Railway, and Heroku.
SKILL.md
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