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AI tool plugins: Testing and quality

Our pass of counted 935 plugins in the category Testing and quality, in 966 listings. 6 appeared in the last 7 days and 0 left in the last 30. The leader by Stars (GitHub) is playwright-mcp, with 38k.

The most popular

Ranked by Stars (GitHub), the figure this marketplace publishes. Figures of different marketplaces are never added up.

  1. playwright-mcp io.github.microsoft/playwright-mcp

    Playwright Tools for MCP

    by microsoft · MCP server · marketplaces: 4

    GitHub stars: 38 027
  2. playwright-pro

    Playwright Pro turns your AI coding agent into a senior test automation engineer. Instead of generating tutorial-quality tests with brittle CSS selectors, Playwright Pro enforces…

    by alirezarezvani · Plugin bundle · Claude

    GitHub stars: 28 021
  3. promptfoo-evals

    Teaches AI coding agents to create and maintain promptfoo eval suites. Encodes best practices like deterministic assertions first, file-based test organization, correct…

    by promptfoo · Plugin bundle · Claude

    GitHub stars: 25 902
  4. Keploy

    End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.

    by keploy · MCP server · Official MCP Registry

    GitHub stars: 18 545
  5. browser-harness

    Open-source browser agent driven via CDP — direct browser control, 79K stars, YC W25. browser-harness gives Claude Code direct, low-level control of a real Chrome browser via the…

    by browser-use · Plugin bundle · Claude

    GitHub stars: 18 391
  6. SeleniumBase MCP

    Stealthy browser automation, testing, and web-scraping via CDP Mode.

    by seleniumbase · MCP server · Official MCP Registry

    GitHub stars: 13 064
  7. mobile-mcp io.github.mobile-next/mobile-mcp

    MCP server for iOS and Android Mobile Development, Automation and Testing

    by mobile-next · MCP server · Official MCP Registry

    GitHub stars: 8 998
  8. mockserver com.mock-server/mockserver

    Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.

    by mock-server.com · MCP server · Official MCP Registry

    GitHub stars: 4 987
  9. invisible_playwright_mcp

    AI browser agent: browses, clicks, types, and reads real web pages from plain-English instructions.

    by feder-cr · MCP server · Official MCP Registry

    GitHub stars: 2 744
  10. tdd-guard

    Enforces Test-Driven Development by intercepting file operations in Claude Code. When Claude attempts to edit or write files, TDD Guard validates the changes against TDD…

    by nizos · Plugin bundle · Claude

    GitHub stars: 2 360
  11. microsoft-foundry

    Skills and interactive Copilot canvas for designing, configuring, testing and deploying agents to Microsoft Foundry.

    by microsoft · Plugin bundle · GitHub Copilot CLI

    GitHub stars: 2 053
  12. testkube-mcp io.github.kubeshop/testkube-mcp

    MCP server for Testkube - Manage test workflows, executions, and artifacts via AI assistants

    by kubeshop · MCP server · marketplaces: 2

    GitHub stars: 1 665
  13. MATLAB MCP Server

    Connect AI coding agents to MATLAB. Run code, tests, and analysis via MCP.

    by matlab · MCP server · Official MCP Registry

    GitHub stars: 1 645
  14. ai-devkit

    A structured software development toolkit that helps Claude Code follow senior-engineer workflows. AI DevKit provides phase-based development lifecycle (requirements, design…

    by codeaholicguy · Plugin bundle · Claude

    GitHub stars: 1 644
  15. brooks-lint

    Code quality diagnosis using principles from six classic software engineering books (The Mythical Man-Month, Clean Code, A Philosophy of Software Design, Working Effectively with…

    by hyhmrright · Plugin bundle · Claude

    GitHub stars: 1 514
  16. emailmd

    Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

    by emailmd.dev · MCP server · Official MCP Registry

    GitHub stars: 1 380
  17. StyleKit

    stdio MCP server for StyleKit styles, templates, assets, tokens, recipes, and lint checks.

    by AnxForever · MCP server · Official MCP Registry

    GitHub stars: 596
  18. winui

    Agents and skills for WinUI 3 app development. Create new WinUI 3 desktop apps, convert from other frameworks (WPF, WinForms, Electron, Tauri, Flutter) to WinUI 3, or add features…

    by microsoft · Plugin bundle · GitHub Copilot CLI

    GitHub stars: 468
  19. agnix

    Lint agent configurations before they silently fail. 414 validation rules across Claude Code, Codex CLI, OpenCode, Cursor, GitHub Copilot, Gemini CLI, Cline, Windsurf, Roo Code…

    by agent-sh · Plugin bundle · Claude

    GitHub stars: 446
  20. flutter-skill io.github.ai-dashboad/flutter-skill

    AI-powered E2E testing for 10 platforms. 253 MCP tools. Zero test code needed.

    by ai-dashboad · MCP server · Official MCP Registry

    GitHub stars: 388

New in the last 30 days

  1. laboratory.love

    Lab results for phthalates and bisphenols in consumer products, plus crowdfunded testing.

    by laboratory.love · MCP server · Official MCP Registry

  2. Proxbase

    Create, test and break real Proxmox VE clusters in QEMU/KVM on the local host.

    by virtbase · MCP server · Official MCP Registry

  3. coso-mcp io.github.simonmak-ascent/coso-mcp

    Open COSO internal-control review MCP: scope, risk, controls, sampling, testing, workpapers.

    by simonmak-ascent · MCP server · Official MCP Registry

  4. pepe

    Load-test a URL, ping it by phase, ramp to find the capacity, compare runs: JSON reports, guardrails

    by omarmhaimdat · MCP server · Official MCP Registry

  5. Vellium & Co Testing Lab

    Independent checks of paid x402 data sellers and of AI-agent access to shopping and travel sites

    by velliumandco.com · MCP server · Official MCP Registry

  6. Voice Agent Linter

    Lints a phone voice agent prompt and platform config before real callers reach it.

    by modernmustardseed.com · MCP server · Official MCP Registry

What these plugins usually run and ask for

Run on a remote server
34% Share of plugins with a remote endpoint: the AI tool talks to a server on the internet.
Run on your machine
51% Share of plugins the AI tool starts locally, as a package or a local command.
Median secrets asked for
0.0 Half of the plugins here ask for this many secret settings (API keys, tokens) or fewer, as their marketplaces declare them.
Bundles with hooks
27% Share of plugin bundles that run shell hooks on events of the AI tool.

Counted over the live plugins of this page. Shares and medians are stated only for groups of at least 20 plugins; they describe declarations, not a security review.

Where they are published

How many of these plugins each marketplace lists. One plugin can be on several of them, so the lines do not add up to the total.

Rows come from our latest passes over the marketplaces. A plugin listed on several marketplaces is one row, with the figure of the marketplace the list is ranked by. GitHub figures rank a plugin only when its repository holds no other plugin we track; the figure of a shared repository is shown as the whole repository's and does not rank.

All AI tool plugins · AI tool plugin statistics

Data comes from the public marketplace file https://github.com/github/awesome-copilot/blob/HEAD/.github/plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the public marketplace file https://github.com/github/copilot-plugins/blob/HEAD/.github/plugin/marketplace.json. Data comes from the public marketplace file https://github.com/cursor/plugins/blob/HEAD/.cursor-plugin/marketplace.json. Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from the public marketplace file https://github.com/anthropics/knowledge-work-plugins/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from the public marketplace file https://github.com/openai/plugins/blob/HEAD/.agents/plugins/marketplace.json. . We publish no contact details for plugin publishers.

Where the data comes from: how the catalog is built