Kai’s Validation LabExplore the concepts

Less busywork.
More building.

10 developer SaaS concepts being tested.

I’m testing a few small tools for the work that keeps getting in the way. Nothing here is a finished product. Find a problem you actually have, see the proposed price, and tell me how you deal with it today.

— Kai

Find your workflow

Which of these gets in your way?

Early concepts. No charge. No commitment.

Concept$19 / month proposed

Coding Capacity

Stop manually juggling coding-agent usage limits.

Developers using two or more paid coding tools.

See concept
Concept$39 / month proposed

Worktree Setup

Start another worktree without rebuilding your local setup.

Small engineering teams running parallel agents against a stateful local stack.

See concept
Concept$19 / month proposed

MCP Process Cleanup

Close an AI client without leaving its MCP processes behind.

Windows developers using local MCP servers across several coding clients.

See concept
Concept$29 / month proposed

Agent CI Spend

See which agent-driven branches are driving your CI bill.

Small teams whose parallel coding agents generate frequent CI runs.

See concept
Concept$39 / month proposed

Sandbox Handoff

Know which agent sandboxes are safe to retire.

Small AI application teams sharing persistent development sandboxes.

See concept
Concept$19 / month proposed

API Change Inbox

Find the API changes that affect the endpoints you use.

Developers maintaining integrations with several third-party APIs.

See concept
Concept$29 / month proposed

Webhook Follow-through

Find webhooks that arrived but never finished processing.

Backend developers who acknowledge webhooks before handing work to a queue.

See concept
Concept$29 / month proposed

Preview Cleanup

Find preview resources left behind after a pull request closes.

Small platform teams managing preview stacks across application and database hosts.

See concept
Concept$49 / month proposed

Subscription Access Check

Find subscription and app-access mismatches before support does.

Technical SaaS founders using Stripe with their own application access rules.

See concept
Concept$39 / month proposed

Usage Receipt Check

Find usage events missing from billing before you close the month.

API SaaS founders who send billable usage from their application to a billing provider.

See concept

I’m looking for a problem worth solving.

Not a vote for your favorite idea. If one of these is part of your working week, I’d like to understand what you use, what still gets annoying, and whether you’d want to try a simpler approach.