Fast, local-first, and no-nonsense API client for macOS and Windows. All your API requests stay on your machine — no cloud, no telemetry, no subscriptions.
Why Fusionx
Built for developers who want a capable, privacy-respecting API client without the cloud lock-in.
Secure Credentials
API keys and tokens are stored in your OS keychain — never in plain text on disk.
Collections & Folders
Organise requests into collections and nested folders for large projects and teams.
Environments & Variables
Switch between dev, staging, and production environments with a single click.
Pre-request & Test Scripts
Write JavaScript test assertions with a Postman-compatible fc API — no migration headaches.
GitHub Sync
Back up and version-control your collections directly to a GitHub repository.
Collection Runner
Run entire collections automatically and export results to PDF for sharing and audits.
Dark & Light Themes
Native-feeling themes that automatically follow your OS preference.
Import & Export
Import from cURL, OpenAPI, and Postman. Export in Fusionx or Postman format.
100% Local Storage
All data lives in IndexedDB on your machine. No servers, no accounts, no internet required.
What's New
Release History
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| Version | Released | macOS (ARM64) | Windows EXE | Windows MSI |
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