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Build a usability test plan from your goal, participants and tasks, and flag tasks that lead the user

Usability test planFreeFor researchers, product teams and designers

25/day

free runs a day, no sign-in.

Before: what you give it

The example input, as typed in. You give it structured JSON.

goal: Find out whether new customers can book a table without help.
participants: {"count":5,"profile":["Eats out at least twice a month","Has booked a restaurant online in the last 3 months"]}
tasks: ["Click the Reserve button and book a table",{"name":"Change a booking","scenario":"Your plans changed and you need to move Friday's dinner to Saturday.","success":"Confirmation shows the new date."}]
product: Larder booking flow

After: what comes back

The first lines of a real run on that input. Nothing here is edited by hand.

# Usability test plan: Larder booking flow

## Goal
Find out whether new customers can book a table without help.

## Format
Moderated sessions, about 45 minutes each, 5 participants. Tasks: 2.

## Screener
- Screen on: Eats out at least twice a month. Ask for the behaviour behind it (what they did, how often, when last) with a multiple-choice question that lists the target answer among several plausible ones, so the right answer is not obvious.
- Screen on: Has booked a restaurant online in the last 3 months. Ask for the behaviour behind it (what they did, how often, when last) with a multiple-choice question that lists the target answer among several plausible ones, so the right answer is not obvious.
- Exclude people who work in design, UX research or marketing, or for the company or a direct competitor (convention).
- Exclude anyone who took part in a study with you in the last 6 months (convention, to limit practised participants).
- Confirm the device, browser and connection needed for the session, and that they can share a screen and talk aloud if the session is remote.
... full output on the tool page

What you get

Screener, session outline, task scenarios with success and stop rules, metrics, and a note-taking sheet

What it cannot do

Fixed template logic with no model call; the leading-wording check is a keyword heuristic.

Who it is for

  • Researchers
  • Product teams
  • Designers

Free and Pro

Free25 runs a day per IP address, up to 20,000 characters a run.
ProNo daily limit, 300 requests a minute, up to 200,000 characters a run.

What each plan includes

Use it from your assistant

The tool is called plan_usability_test. Connect the server once, then ask for it by name or just describe the job. Install steps for each app.

claude mcp add --transport http designers https://designers.allthepossibles.com/mcp
curl -X POST https://designers.allthepossibles.com/api/usability-test-plan -H 'content-type: application/json' -d '{"goal":"Find out whether new customers can book a table without help.","participants":{"count":5,"profile":["Eats out at least twice a month","Has booked a restaurant online in the last 3 months"]},"tasks":["Click the Reserve button and book a table",{"name":"Change a booking","scenario":"Your plans changed and you need to move Friday'\''s dinner to Saturday.","success":"Confirmation shows the new date."}],"product":"Larder booking flow"}'

Try it here

The form starts with the same example input, so you can run it first and then swap in your own.

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