What problem does it solve?
Bridge the gap between static code analysis and live browser execution so agents can verify runtime behavior, reproduce UI bugs, and confirm fixes by observing the actual page state instead of guessing from code alone.
Core Features & Use Cases
- Live DOM Inspection: Read the rendered DOM tree to verify component structure and detect mismatches between expected and actual markup.
- Console & Network Analysis: Capture console errors, warnings, and network requests to diagnose runtime exceptions, API failures, and CORS or payload issues.
- Performance Profiling: Record traces to measure LCP, CLS, INP, and identify long tasks or render bottlenecks.
- Visual Verification: Take before/after screenshots for visual regression testing and responsive layout checks.
- Security-conscious JS Execution: Run constrained, read-only JavaScript in the page context for targeted state inspection while avoiding credential access or external requests.
- Use Case: Reproduce a task completion animation bug by reproducing the steps in the browser, inspecting the DOM and styles, checking console logs, examining network PATCH requests, applying a code fix, and verifying the visual result with screenshots.
Quick Start
Open the target page with Chrome DevTools MCP and ask the agent to reproduce the issue, capture a screenshot, inspect the DOM and computed styles, report console errors, analyze relevant network requests, and summarize findings.
