I built a visual API builder where you drag-and-drop endpoints and it generates a real, callable URL. Still rough around the edges, but looking for feedback.
I've been building something for the past few months that I'd love some early eyes on.
The problem I kept running into:
Every time I needed to stitch together a few external APIs - combine the responses, strip out fields I don't need, rename some keys, apply some logic - I ended up writing the same boilerplate Express/Next route handler over and over. It works, but it's tedious and I always felt like I was doing something that should be more visual.
What I built:
A drag-and-drop canvas where you wire up external API calls (REST, GraphQL, SOAP) into nodes, map and transform the fields you care about, and it publishes a single clean endpoint at a real URL you can actually hit from anywhere. No server to manage, no boilerplate.
You connect an InputNode (the external API call), wire it to an OutputNode (your published endpoint), and in between you can chain 70+ transformers (things like toUpperCase, formatDate, extractFromArray, calculateAge) and conditions (if/else on field values).
The result is a real URL: https://apifunnel.io/api/your-base/your-canvas/your-endpoint
It's not a mock. You can curl it.
What I'm NOT claiming:
- It doesn't replace real backends for complex apps.
- It won't help you if you need custom auth logic or a full database.
- It's better suited for aggregation, transformation, and proxying than heavy business logic.
Where it's at:
Beta. There's a 14-day free trial, no credit card required. It's rough in places. The AI canvas assistant (you can describe changes in natural language and it updates the canvas) is the newest thing and still has quirks.
What I'm looking for:
Honest feedback. If this solves a problem you've had, I'd love to hear how you'd want it to work. If it seems useless for your workflow, I'd genuinely like to know why.
Happy to answer any technical questions about how it works under the hood.
Built with Next.js, ReactFlow, PostgreSQL, and a worrying amount of caffeine.
Posted Apr 7, 2026, 11:16 AM UTC