Stack · Quality engineering

Browser QA desk

Drives the real interface, keeps the end-to-end suite current, and checks the things a screenshot does not show.

Built for: The team whose test suite is three releases behind the interface it is supposed to be testing.

Install all 9 parts

The button opens the checkout, where 5 servers and 4 skills are listed one by one with what each does to the bill — free, already yours, monthly or a one-off licence. Nothing is charged until you confirm it there, in Stripe’s own card frame on that page rather than a redirect, and each paid member keeps its own budget cap.

$14/mo
5 servers at their publishers’ prices, with one-off licences spread over 12 months
$0
the free-tier version keeps 4 servers and 3 skills — 0 of the 1 tools
$0
4 skills with no monthly cost, plus $15 paid once
41.5k
tokens of context the skills add to every session
01 · Outcome

What your agent can do with this

The reason to buy a stack rather than five listings: each line below needs more than one member connected at the same time.

  1. 01

    Walk a user flow in a real browser and report where it stops, with the screenshot and the console attached.

  2. 02

    Write and maintain versioned Playwright specs, and update the ones that a UI change has just invalidated.

  3. 03

    Audit the accessibility tree of a page and list what a screen reader will and will not find.

  4. 04

    Catch the images shipped at four times their rendered size, which is the cheapest performance bug there is.

02 · Assembly

The assembly, part by part

What each part contributes, and why it was picked over the obvious alternative. Prices and permissions are read from the listings, so nothing here can disagree with the catalogue.

5 servers4 skills1 tools
PU01

Scripted browser automation for the flows you already know the steps of — the backbone of a regression pass.

read/write split not recordedruns on your machine A v0.7.2 credential not declared · runs locally
Free
$0 of the monthly total
BR02

For the exploratory half: an agent that finds its own way through a page you have not scripted yet.

read/write split not recordedruns on your machine A v0.1.2 credential not declared · runs locally
Free
$0 of the monthly total
A103

Accessibility analysis of the page as rendered, so the audit is about the live DOM rather than about the components in the repository.

read/write split not recordedruns on your machine A v1.0.2 credential not declared · runs locally
Free
$0 of the monthly total
IM04

Audits every image on a page — natural against rendered size, formats, oversized files — which is a whole class of defect nobody files by hand.

1 readread-onlyruns on your machine A v0.1.2 credential not declared · runs locally
from $14/mo
$14 of the monthly total
GI05

Where the specs live and where the failures get reported; a QA desk with no way back into the repository just produces screenshots.

read/write split not recordedruns on your machine A v1.8.0 credential not declared · runs locally
Free
$0 of the monthly total
and the instructions that drive them A skill is a prompt file, not a server: it adds context and a procedure, never a tool or a permission of its own.
PL06
Playwright E2E Testing Agent skill Expertise by fugazi

Authors and maintains versioned Playwright specs in TypeScript, which is the difference between a suite and a folder of scripts.

21k tokens of context never asks for a write 19 files · Complete terms in LICENSE.txt needs no server of its own
Free
no monthly cost
WE07
Web Application Testing Agent skill Workflow by anthropics

The interactive half — driving a local application, verifying behaviour, capturing what happened when it broke.

5.6k tokens of context never asks for a write 6 files · Complete terms in LICENSE.txt needs no server of its own
Free
no monthly cost
BR08
Browser Trace Agent skill Workflow by browserbase

Captures the full DevTools-protocol trace and bisects it, for the failure that only happens in the run you were not watching.

11.3k tokens of context never asks for a write 5 files · MIT needs no server of its own
Free
no monthly cost
UI09
UI4 Convert Tests Agent skill Guardrail by payloadcms

Reads what changed in the interface and finds the tests that change with it, which is the work that otherwise never gets done.

3.5k tokens of context never asks for a write 1 files · MIT needs no server of its own
$15
$1.25 of the monthly total
03 · Cost

What it costs, and on what assumption

Every member is a subscription or a licence bought once, so the monthly figure is a price rather than an estimate: what moves it is adding or dropping a member, not how hard the stack is worked. The one assumption is that a one-off licence is spread over a year so it can sit in the same column as a subscription.

PartWhat you are paying forMonthly, as quoted
Puppeteer Free
Browser Use Free
A11y Tools Free
Imagedimensions from $14/mo $14/mo
Gitlab Free
Skills
Playwright E2E Testing Free · context cost only
Web Application Testing Free · context cost only
Browser Trace Free · context cost only
UI4 Convert Tests $15 · $1.25/mo over 12 months $1.25/mo
Everything above $14 of servers plus $1.00 of skills, the same in a quiet month and a busy one $15/mo

Subscriptions at their monthly plan price; one-off licences spread over 12 months. One-off purchases in this stack total $15 — UI4 Convert Tests $15 — paid once and spread here so they sit in the same column as a subscription. Everything arrives on one mcprush invoice, taken by Stripe from the card on your account, not one per publisher — mcprush.com is the merchant of record and each publisher is paid out of it.

The free-tier version$0/mo

Install only these and the bill is nothing: 4 servers and 3 skills, 0 of the 1 tools.

Left out, and what goes with it:

  • Imagedimensions · from $14/moAudits every image on a page — natural against rendered size, formats, oversized files — which is a whole class of defect nobody files by hand.
  • UI4 Convert Tests · $15Reads what changed in the interface and finds the tests that change with it, which is the work that otherwise never gets done.
What moves the bill
Flat every month$14 · 1 subscription
Carries a call allowance1 member
Paid once$15
Traffic assumed5k calls / month

Imagedimensions at from $14/mo. Each of those plans states the calls it includes in a month, and running past one never arrives as a larger invoice: the gateway refuses the call over the allowance and returns an MCP error naming the plan. The figure above is what the stack costs in a busy month as well as a quiet one — what a heavy month changes is which plan you need, not what this one bills.

Budget caps are set per install and enforced at the gateway, so a retry loop is refused at the cap rather than left to run through an allowance overnight.

04 · Setup

Setting it up, in order

One step per part, in the order they are useful: connect what the work reads before what it writes, and install the skills that decide how the work is done last. Each step is a command you can read before you run it.

1
Give it a test environment
Point the browser members at staging with seeded accounts. A QA desk aimed at production writes real records the first time a flow completes.
2
Two browser servers, two jobs
Puppeteer replays a scripted path; browser-use decides its own next step. Keep both only if you actually use both — otherwise the desk asks twice.
3
Store credentials outside the prompt
Test logins belong in the client's environment configuration, not typed into a session where they end up in a transcript.
4
Adopt the specs into the repository
The Playwright skill writes versioned specs; they are worth nothing until they live in your repository and run in CI.
One command9 parts
npx mcprush@latest stack add browser-qa

Nothing in this stack installs from one command today: 9 members are either paid, run from its own source, or a skill with its own command — the steps above name each one. Nothing is connected until you approve it.

Before you start
  • 5 members have not declared what credential they need — check each one’s own page before you start.
  • What this stack can write is not recorded — 4 members of 5 have no imported tool surface. Section 05 says what is known before you approve anything.
  • 5 members can run on your own machine instead of ours, if you would rather they did.
05 · Permissions

What the whole stack can reach

Installed together, these tool surfaces add up. It is the first thing a security reviewer asks for, so what has been counted — and what nobody has counted yet — is on the page rather than in a PDF.

tools that only read
Which tools read and which write is counted from the surface a publisher imports, and 4 members of 5 have no imported tool surface.
tools that can change something
Not recorded, and not estimated: a total added up from the members that have a surface would be read as the whole stack’s. The table below is what is known, member by member.
0
tools that reach the network
1 of the 1 never leave your machine — they belong to the local members.
Who grants the write accessnot recorded
MemberTool surfaceWrite tools
A11y Tools not imported not recorded
Browser Use not imported not recorded
Gitlab not imported not recorded
Puppeteer not imported not recorded
Reading the number

A stack's blast radius is the union of its members, not the worst of them. That union cannot be taken here, because 4 members of 5 have no imported tool surface — so the figure a review asks for is missing rather than low, and a member marked not imported is one nobody has counted rather than one that cannot write.

Tools in total1
Write sharenot recorded
Members that can writenot recorded
Surface imported1 of 5 members
06 · Swaps

Sensible swaps

A stack is a default, not a verdict. These are the substitutions the maintainer would make, and what each one costs or saves.

When the work is inspecting a page's own devtools rather than clicking through it, the Brave DevTools server is the closer fit.

same money at 5k calls the same 0 tools grade B instead of grade A

A team that wants security, performance and accessibility from one scan rather than accessibility alone takes the broader scanner and reads less detail on each.

same money at 5k calls the same 0 tools both grade A
07 · Limits

Where this stack stops

Written by the maintainer, kept on the page rather than in a support thread.

  • It cannot certify accessibility. The audit finds machine-checkable failures; the rest of WCAG needs a person and an assistive technology.

  • It does not run your CI. Specs are authored and debugged here; scheduling them is the pipeline's job.

  • Anything behind a CAPTCHA or a real payment stops the desk. That is the boundary of automation, not a configuration to change.

08 · Maintenance

Who keeps this current

A stack has an owner: whoever keeps it re-checks the combination when a member changes, and the members themselves are published by the people named on each row.

Maintainer
mcprush
Publishes this stack only
Version
null
Set by the curator
Member installs
none yet
Added up across the parts. Nothing counts installs of the set as one thing.
Member rating
No reviews yet
None of the parts has been reviewed, and neither has the stack.
Composition
5 + 4
5 servers, 4 skills
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