JSONProxy
A proxy server that enables cross-domain requests to any JSON API, now deprecated.
What is JSONProxy?
JSONProxy is a deprecated HTTP proxy server that enables cross-domain requests to JSON APIs by bypassing browser same-origin policy restrictions. It routes client-side requests through a proxy endpoint, allowing developers to fetch JSON data from external domains without CORS configuration. The project was designed to simplify access to public APIs but has been shut down due to hosting costs.
Frontend developers and web application builders who need to consume JSON data from third-party APIs without control over server-side CORS headers.
Developers chose JSONProxy for its simplicity in enabling cross-domain JSON requests without backend modifications, offering a lightweight, deployable proxy solution that could be self-hosted or run locally for development.
Overview
DEPRECATED - A proxy to help with cross-domain requests
Use Cases
Best For
- Fetching JSON data from APIs that don't support CORS
- Building client-side applications that rely on multiple external JSON APIs
- Testing API integrations locally without CORS restrictions
- Creating simple proxy endpoints for development and prototyping
- Learning about cross-domain request mechanisms and JSONP alternatives
- Deploying lightweight proxy services on Cloudflare Workers
Not Ideal For
- Projects requiring a free, hosted proxy service without self-management overhead
- Production applications that depend on high availability and ongoing maintenance
- Teams seeking a solution with active development and community support
- Developers avoiding the complexity of Cloudflare Workers and Terraform deployment
Pros & Cons
Pros
Enables client-side JavaScript to fetch JSON from any domain by routing requests through a proxy, bypassing same-origin policy without server-side CORS configuration.
Built for Cloudflare Workers, allowing scalable, low-latency proxying with minimal infrastructure management, as detailed in the deployment instructions.
Can be run locally using Node.js for development and testing, facilitating easy integration into workflows without immediate deployment.
Works with existing JSONP client libraries or custom proxy URLs, making it simple to integrate into projects already using JSONP.
Cons
The project is no longer actively developed, with the hosted service shut down due to costs, forcing users to self-host without updates or support.
Requires setting up Cloudflare Workers and Terraform, which involves managing API tokens and DNS, adding setup complexity for inexperienced teams.
Specifically designed for JSON APIs only, so it cannot proxy other data formats like XML or handle general HTTP requests, limiting its utility.
Frequently Asked Questions
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