ApiFlux – A Visual Playground to Build and Debug API Workflows

Hi HN I just launched ApiFlux, a visual tool to help backend developers build, connect, and test APIs like nodes in a flowchart – without writing glue code for every integration.

Why I built it: As a backend developer, I often stitched together multiple APIs, transformations, and error handling manually. I wanted something like Postman, but more composable, visual, and better for multi-step workflows. So I built it.

Github Link: https://github.com/complex1/webflow-app

Live: https;//apiflux.in

What it does: Add APIs and logic as nodes.

Connect APIs using variables across steps. Add custom data transforms inline. Debug inputs/outputs visually with history. Test flows live with real API calls. Works locally in browser also.

Under the hood: Built with Node.js, Nginx, and Vue Zero config setup (no login needed)

Entirely open-source (MIT) — self-hostable I'm actively working on: Authentication flows Team workspaces CLI and deployment support

Would love feedback from fellow developers and builders here. Especially interested in your thoughts on: What API debugging or chaining pain points you have

Whether a tool like this fits into your workflow

What you'd need before using it in production

Thanks for reading — happy to answer anything here or on GitHub! https://github.com/complex1/webflow-app