Visual API Flow Builder — Build Multi-Step Monitors with Drag and Drop

API Monitoring Should Be Visual

API transaction monitoring typically means chaining multiple HTTP requests: authenticate, get a token, call a protected endpoint, verify the response. Until now, building these chains meant filling out form fields step by step — functional, but not intuitive.

Today we are shipping the Visual API Flow Builder — a React Flow-powered canvas that lets you design multi-step API monitors by dragging, connecting, and editing visual nodes. And it is free for all users.

What You Get

Visual Canvas

Each API step is a visual node showing its HTTP method (color-coded: GET in green, POST in blue, PUT in amber, DELETE in red), the target URL, assertion count, and any extracted variables. Nodes are connected by animated edges that show which variables flow from one step to the next.

Click-to-Edit Panels

Click any node to open a slide-out editor on the right side of the canvas. Edit the URL, headers, request body, assertions, and variable extraction rules — all without leaving the visual view.

Live Testing

Hit the "Test Run" button and watch your entire API chain execute in real time. Each node lights up green or red as its step passes or fails, with response times shown inline. Assertion results appear in the editor panel.

Form/Visual Toggle

Switch freely between the traditional form view and the visual canvas. Both views share the same underlying data — toggle without losing a single field.

5 Ready-to-Use Templates

Not sure where to start? Pick from five pre-built templates:

1. API Login Flow — authenticate, extract token, call protected endpoint
2. E-commerce Checkout — browse products, add to cart, checkout, verify order
3. Health Check Chain — hit multiple health endpoints in sequence
4. OAuth Token Flow — request token, use token, verify resource access
5. Webhook Verification — send webhook, poll for processing result

Each template loads real step data into the builder — customize URLs, credentials, and assertions to match your API.

Why Multi-Step Is Free

Most monitoring platforms restrict API transaction monitoring to paid plans. We made it free because multi-step checks run as regular HTTP requests — no browser, no Chrome, no expensive infrastructure. The cost to us is the same as a standard HTTP check, so there is no reason to gate it.

This makes Monitorion the only monitoring platform where you can build visual API transaction monitors for free. No credit card, no trial period, no catch.

Try it now: Create a multi-step monitor and switch to the Visual Builder tab. Or sign up free if you do not have an account yet.