Chrome DevTools MCP is an MCP server that lets coding agents control and inspect a live Chrome browser for automation, debugging, screenshots, network analysis, console inspection, and performance tracing. It is for developers who want AI coding assistants to test and diagnose web applications, and the catalogue add-ons provide workflows for using those browser tools.
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.
git clone --depth 1 https://github.com/ChromeDevTools/chrome-devtools-mcpWrote 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.
[](https://agentmods.dev/plugins/chromedevtools/chrome-devtools-mcp/gemini-extension)<a href="https://agentmods.dev/plugins/chromedevtools/chrome-devtools-mcp/gemini-extension"><img src="https://agentmods.dev/badge/plugins/chromedevtools/chrome-devtools-mcp/gemini-extension/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.
<a href="https://agentmods.dev/plugins/chromedevtools/chrome-devtools-mcp/gemini-extension"><img src="https://agentmods.dev/badge/plugins/chromedevtools/chrome-devtools-mcp/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
chrome-devtools-mcp 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 2d ago.
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.
Copies of this mod
2 near-identical copies found in the catalogue:
- chrome-devtools-mcp — 100% identical, 4 lines differ
- chrome-devtools-mcp — 100% identical, 4 lines differ
What it actually says
{
"name": "chrome-devtools-mcp",
"version": "1.12.0",
"mcpServers": {
"chrome-devtools": {
"command": "npx",
"args": [
"[email protected]"
]
}
}
}
What ships with it
60 files beside gemini-extension.json 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.
- scripts/append-lighthouse-notices.ts 799 B runs code
- scripts/clean-submodules.ts 998 B runs code
- scripts/count_tokens.ts 906 B runs code
- scripts/eslint_rules/check-license-rule.js 2.4 KB runs code
- scripts/eslint_rules/enforce-using-rule.js 2.8 KB runs code
- scripts/eslint_rules/enforce-zod-schema-rule.js 1.6 KB runs code
- scripts/eslint_rules/local-plugin.js 856 B runs code
- scripts/eslint_rules/no-direct-third-party-imports-rule.js 4.1 KB runs code
- scripts/eslint_rules/no-sinon-restore-in-hooks-rule.js 2.6 KB runs code
- scripts/eslint_rules/require-parsed-arguments-rule.js 4.1 KB runs code
- scripts/eval_gemini.ts 7.7 KB runs code
- scripts/eval_result.ts 3.4 KB runs code
- scripts/eval_scenarios/console_test.ts 759 B runs code
- scripts/eval_scenarios/cookie_banner_conformance_test.ts 1.6 KB runs code
- scripts/eval_scenarios/cookie_debugging_test.ts 1.1 KB runs code
- scripts/eval_scenarios/cookie_httponly_trigger_test.ts 769 B runs code
- scripts/eval_scenarios/cookie_issues_audit_test.ts 801 B runs code
- scripts/eval_scenarios/css_cascade_layer_override_test.ts 1.8 KB runs code
- scripts/eval_scenarios/css_custom_property_resolution_test.ts 1.9 KB runs code
- scripts/eval_scenarios/css_descendant_specificity_test.ts 1.9 KB runs code
- scripts/eval_scenarios/css_important_vs_specificity_test.ts 1.5 KB runs code
- scripts/eval_scenarios/css_inline_style_override_test.ts 1.7 KB runs code
- scripts/eval_scenarios/emulation_test.ts 547 B runs code
- scripts/eval_scenarios/emulation_userAgent_test.ts 798 B runs code
- scripts/eval_scenarios/emulation_viewport_test.ts 674 B runs code
- scripts/eval_scenarios/fill_select_and_checkboxes_test.ts 3.0 KB runs code
- scripts/eval_scenarios/fix_webpage_issues_test.ts 1.9 KB runs code
- scripts/eval_scenarios/frontend_snapshot_test.ts 853 B runs code
- scripts/eval_scenarios/input_parallel_test.ts 1.0 KB runs code
- scripts/eval_scenarios/input_test.ts 944 B runs code
- scripts/eval_scenarios/isolated_context_test.ts 633 B runs code
- scripts/eval_scenarios/lighthouse_a11y_test.ts 884 B runs code
- scripts/eval_scenarios/lighthouse_best_practices_test.ts 891 B runs code
- scripts/eval_scenarios/navigation_test.ts 656 B runs code
- scripts/eval_scenarios/network_test.ts 775 B runs code
- scripts/eval_scenarios/page_focus_keyboard_test.ts 2.5 KB runs code
- scripts/eval_scenarios/page_id_routing_concurrent_form_test.ts 2.7 KB runs code
- scripts/eval_scenarios/page_id_routing_cross_page_state_test.ts 3.1 KB runs code
- scripts/eval_scenarios/page_id_routing_test.ts 1.8 KB runs code
- scripts/eval_scenarios/performance_test.ts 559 B runs code
- scripts/eval_scenarios/select_page_test.ts 695 B runs code
- scripts/eval_scenarios/snapshot_test.ts 639 B runs code
- scripts/generate-cli.ts 5.8 KB runs code
- scripts/generate-docs.ts 13 KB runs code
- scripts/post-build.ts 7.0 KB runs code
- scripts/prepare.ts 3.6 KB runs code
- scripts/profile/inspector.ts 4.2 KB runs code
- scripts/profile/profile_mcp.ts 11 KB runs code
- scripts/profile/scenarios/get_console_messages.ts 710 B runs code
- scripts/profile/scenarios/get_css_styles.ts 1.5 KB runs code
- scripts/profile/scenarios/navigation.ts 893 B runs code
- scripts/profile/scenarios/page_churn.ts 1.0 KB runs code
- scripts/profile/scenarios/performance_trace.ts 1.3 KB runs code
- scripts/profile/source_map_server.ts 4.7 KB runs code
- scripts/profile/types.ts 777 B runs code
- scripts/profile/utils.ts 3.3 KB runs code
- scripts/test.js 3.1 KB runs code
- scripts/tsconfig.json 622 B
- scripts/update_metrics.ts 3.8 KB runs code
- scripts/update-lighthouse.ts 1.4 KB runs code
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.
- 2d ago Changed 1294498a3997
- 9d ago Changed c3bf6e8d1f51
- 1mo ago Changed c39b05ef9d4a
- 1mo ago Changed e53b8a00ca56
- 1mo ago First seen · 13 lines scan A 2120ea03f5bf
chrome-devtools-mcp is a plugin published in the GitHub repository ChromeDevTools/chrome-devtools-mcp (54,101 stars, last pushed today), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-07.
Other plugins, from other repositories
devcdp
Real Chrome DevTools access for Claude: console, network, DOM, source maps, breakpoints and live variables, plus guidance on when to use each.
devcdp
Real Chrome DevTools access for Gemini CLI: console, network, DOM, source maps, breakpoints and live variables.
webview-devtools-mcp
DevTools for any WebView — no remote-debugging port required. Works in Safari/iOS WebView/Lark Web App and more.
brave-devtools-mcp
Reliable automation, in-depth debugging, and performance analysis in Brave using DevTools and Puppeteer.
firefox-devtools-mcp
Control Firefox for browsing, web testing, and debugging. Fill forms, capture network and console activity, take screenshots, run scripts, and profile performance. Supports Android devices.
firefox-devtools-troubleshoot
Diagnose and fix Firefox DevTools MCP setup issues. Use this if the firefox-devtools-mcp plugin is not working.