raylyt presentsAPI flows, alive across your Mac.
Design, run, and automate API flows in the same environment where you work. Lumen Flow combines a visual canvas, macOS context, and on-device intelligence — built in Swift, by engineers for engineers.
Native. Ultra-fast. Fluid UI even with complex Flows.
Flow Canvas · Lumen Flow · macOS 26+
See Lumen Flow in action
Real screenshots of the native interface.
Flow Canvas · Visual orchestration of HTTP requests, conditional logic, and loops.
Execution Panel · Detailed history · request, response, and validation status for every step.
Execution Diff · Git-style comparison between responses of any two steps.
More than an app. A true macOS citizen.
Lumen Flow integrates deeply into the operating system, from Spotlight search to the menu bar.
Spotlight
Your Spaces and Flows appear directly in system search — ⌘Space is all it takes to find what you need.
Shortcuts & Siri
Run a Flow, check status, or import collections directly via Shortcuts.app, Siri, or Voice Control — with confirmation before any network request.
Interactive Widgets
Desktop Space and Flow Widgets in three sizes, with quick access to open your Spaces and Flows directly in the app.
Menu Bar Extra
Recent runs, Flow execution, and Profile switching always accessible without interrupting your workflow.
Quick Look
Press space on any .lumenflow file in Finder to preview flows, profiles, and nodes instantly.
Performance & Precision Engineering
Real metrics measured in native macOS development diagnostics.
0%
Sustained idle CPU
No hidden background daemons: when idle, CPU consumption stays at a flat 0%.
Stable
Controlled memory footprint
Navigating between flows and execution steps maintains constant RAM usage with zero memory leaks.
SHA-256
Optimized storage
Responses are deduplicated via SHA-256 hash; large payloads are saved to disk efficiently.
Measured internally during development (macOS 26, Apple Silicon). Technical engineering diagnostics.
Built for API Engineering
From the first sketch to everyday automation: one environment for turning calls into reliable workflows.
Built by and for Engineers
Lumen Flow was conceived by professionals who work with APIs daily: cURL import, response diff, Git Sync versioning, and full keyboard control.
About raylyt
raylyt creates native work environments for people who build on the Mac. Lumen Flow is the first of them.
Ready to elevate your API workflow?
Sign up for early access and get notified as soon as it's available for macOS.
Join the waitlistmacOS 26 or higher · Native Apple Silicon