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Jefferson Gonçalves
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Echolon

Echolon - A powerful, local-first API client

#Echolon

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A powerful, git-native and local-first API client built with Electron and React.

#Features

  • Collections & Requests: Organize your API requests in collections and folders
  • Environment Variables: Manage different environments with variables
  • Request Builder: Full-featured request builder with params, headers, body, auth
  • Response Viewer: View responses with syntax highlighting and search
  • API Mocking: Advanced API mocking features (cloud + local)
  • History: Track all your request history
  • Imports: Import OpenAPI/Swagger or Postman files
  • cURL Export: Export requests as cURL commands
  • Dark/Light Mode: Beautiful themes for any preference
  • Completely Local: All data stored locally, no account required
  • Git Client: Integrated Git Client to share workspaces/collections with your team

#Commercial

Echolon is a open source project. There is a paid version if you want to support the future development. It offers features that are required on a larger scale but 95% of its features are completely. The commercial usage applies to the binaries downloaded from Github or echolon.app. If you want to build the project yourself it is 100% free.

#Helpful Links

#Development

#Repo structure

  • core -> Echolon electron app
  • docs -> astro based documentation
  • sample-api -> Echolon sample api
  • web -> Echolon web version

#Prerequisites

  • Node.js 18+
  • npm or yarn

#Setup

cd core
# Install dependencies
npm install

# Start development server
npm run dev

#Building

cd core
# Build for all platforms
npm run package:all

# Build for specific platform
npm run package:mac
npm run package:win
npm run package:linux

#Release Electron for (Mac, Windows and Linux)

cd core
npm run release:all

#Release for web

cd web
npm run deploy 
npm run deploy:lib

#Code Signing (Optional)

For macOS code signing, set these environment variables:

CSC_LINK=/path/to/certificate.p12
CSC_KEY_PASSWORD=certificate_password
APPLE_ID=your@email.com
APPLE_APP_SPECIFIC_PASSWORD=xxxx-xxxx-xxxx-xxxx
APPLE_TEAM_ID=XXXXXXXXXX

For Windows code signing (optional, without you get a warning on install):

CSC_LINK=/path/to/certificate.pfx
CSC_KEY_PASSWORD=certificate_password

For linux builds:

brew install rpm

#Tech Stack

  • Electron - Cross-platform desktop app
  • React 18 - UI framework
  • TypeScript - Type safety
  • Vite - Fast bundler
  • Ace Editor - Code/JSON viewer

#License

MIT

New version available.