What is playwright-mcp-skill?

A browser-control skill that lets a coding agent navigate web pages, inspect their page structure, and perform scripted actions through Playwright, a browser automation tool.

Use it to open pages, inspect their contents, and run repeatable browser interactions from the command line, usually without showing a browser window.

It removes the need to control a browser manually or write one-off automation setup. Reusable sessions and safety checks help make repeated browser tasks more predictable.

playwright-mcp-skill — Skill for Codex by holon-run

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add holon-run/uxc --skill playwright-mcp-skill

Clone the repo

git clone --depth 1 https://github.com/holon-run/uxc

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/holon-run/uxc/playwright-mcp-skill/github.svg)](https://agentmods.dev/skills/holon-run/uxc/playwright-mcp-skill)

Your own site

<a href="https://agentmods.dev/skills/holon-run/uxc/playwright-mcp-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/playwright-mcp-skill/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/holon-run/uxc/playwright-mcp-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/playwright-mcp-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,057 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 11 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium MCP Rug Pull · line 22
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 23
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 25
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 27
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 29
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 34
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 42
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 46
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 47
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 64
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium Rogue Agent · line 41
Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00052	$0.01057
Opus 5	$0.00026	$0.00528
Sonnet 5	$0.00010	$0.00211
Haiku 4.5	$0.00005	$0.00106

Measured 9d ago against content hash 9630dac2b202, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

playwright-mcp-skill scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

playwright-mcp-skill — 100% identical, 0 lines differ

skills/playwright-mcp-skill/SKILL.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Playwright MCP Skill

Use this skill to run Playwright MCP operations through uxc using fixed stdio endpoints.

Reuse the uxc skill for generic protocol discovery, auth/error handling, and envelope parsing rules.

Prerequisites

uxc is installed and available in PATH.
npx is available in PATH (Node.js installed).
Network access for first-time @playwright/mcp package fetch.
Browser runtime can start locally (headless mode is default in this skill).

Core Workflow (Playwright-Specific)

Endpoint candidate inputs before finalizing:

Raw package form from docs: npx @playwright/mcp@latest
Reliable non-interactive form: npx -y @playwright/mcp@latest
Isolated/headless stable form (default for this skill):
- npx -y @playwright/mcp@latest --headless --isolated
- Shared-profile headless form (for persistent login state):
- npx -y @playwright/mcp@latest --headless --user-data-dir ~/.uxc/playwright-profile
- Shared-profile headed form (for interactive debug with same login state):
- npx -y @playwright/mcp@latest --user-data-dir ~/.uxc/playwright-profile

Verify protocol/path from official source and probe:
- Official source: https://github.com/microsoft/playwright-mcp
- probe candidate endpoints with:
  - uxc "npx -y @playwright/mcp@latest --headless --isolated" -h
- Confirm protocol is MCP stdio (protocol == "mcp" in envelope).
Detect auth requirement explicitly:
- Run host help or a minimal read call and inspect envelope.
- @playwright/mcp default flow is no OAuth/API key for local stdio use.
Use fixed link command by default:
- command -v playwright-mcp-cli
- If missing, create it:
  - uxc link playwright-mcp-cli "npx -y @playwright/mcp@latest --headless --isolated"
- Optional shared-profile dual command setup for persistent sessions:
  - command -v playwright-mcp-headless
  - command -v playwright-mcp-ui
  - uxc link --daemon-exclusive ~/.uxc/playwright-profile playwright-mcp-headless "npx -y @playwright/mcp@latest --headless --user-data-dir ~/.uxc/playwright-profile"
  - uxc link --daemon-exclusive ~/.uxc/playwright-profile playwright-mcp-ui "npx -y @playwright/mcp@latest --user-data-dir ~/.uxc/playwright-profile"
- playwright-mcp-cli -h
- If command conflict is detected and cannot be safely reused, stop and ask skill maintainers to pick another fixed command name.
Inspect operation schema before execution:
- playwright-mcp-cli browser_navigate -h
- playwright-mcp-cli browser_snapshot -h
- playwright-mcp-cli browser_click -h
Prefer read-first interaction:
- Start with navigation/snapshot before mutating page state.
Execute actions with explicit confirmation when impact is high:
- Confirm before form submission, checkout, delete/destructive actions, or irreversible multi-step flows.

Read the full file on GitHub · 77 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

9d ago First seen · 77 lines · 52 tokens per session scan A 9630dac2b202

Subscribe to this mod's changes

playwright-mcp-skill is a skill published in the GitHub repository holon-run/uxc (113 stars, last pushed today), licensed MIT. It adds 52 tokens to every session and 1,057 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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