Go API Explorer

A minimal, production-ready JSON API testing and exploration tool written in Go.
Designed for simplicity, learning, and smooth deployment with interactive frontend presets.

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Features

• Quickly explore public APIs with preset examples
• Auto-fill method, URL, and request body on click
• Supports GET, POST, PUT, DELETE requests
• Displays formatted (Pretty) or raw JSON responses
• Searchable categories for APIs: Animals, Fun, Space, Weather, Crypto, Media, Tech, Utility, Random
• Fully responsive layout optimized for desktop and mobile
• Serves all static assets (index.html, script.js, CSS) from /static
• Deployable on Render.com with zero configuration

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Tech Stack

• Go – backend server, proxies API requests and serves static files
• Tailwind CSS – frontend styling and responsive layout
• Vanilla JS – interactive form handling, presets, and dynamic sidebar
• In-memory presets – stored in JS object for demo / portfolio use

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TODO / Improvements

• Direct API requests (bypass proxy)
  Add an optional toggle/button to send requests directly from the frontend for same-origin APIs. Useful for APIs that don't require CORS proxying.

• CORS / Cross-Origin handling
  Improve handling of external APIs with CORS restrictions. Consider:

  • Adding mode: 'cors' and credentials options to fetch
  • Fallback to server-side proxy for APIs with strict CORS

• Error handling & validation

  • Better frontend validation for URLs and JSON input
  • Show more descriptive errors when proxy request fails

• Request presets enhancements

  • Add custom user presets saved locally (localStorage)
  • Support for more HTTP methods and headers

• UI/UX improvements

  • Responsive layout tweaks for mobile (e.g., send button alignment)
  • Optional dark/light theme toggle
  • Loading spinner improvements

• Security / Safety

  • Rate-limiting requests to prevent abuse via the proxy
  • Input sanitization for request body

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Deployment on Render.com

This tool is optimized for Render.com deployment:

• Dynamic ports are handled via the PORT environment variable
• Static assets served directly from the /static folder
• Simply push your repo and let Render handle the rest

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Usage

1. Open the deployed app URL
2. Click on a preset API from the sidebar to auto-fill the form
3. Adjust the HTTP method, URL, or JSON body if needed
4. Click Send to see the response in the right panel
5. Switch between Pretty and Raw view for request body
6. Use the Copy button to copy current request info

Enjoy a fully interactive, mobile-friendly JSON API Explorer, ready for demos or portfolio showcase!