Chrome DevTools MCP wraps Chrome DevTools Protocol (CDP) as an MCP server, giving AI agents direct access to 40+ CDP Domains including Profiler, HeapProfiler, and Security that Playwright and Puppeteer MCP don't expose — at the cost of having to implement MCP tool definitions and auto-wait logic yourself.
server-puppeteer is the Puppeteer wrapper in the official MCP servers monorepo — seven lean tools built around screenshots and evaluate. Token cost is significantly higher than @playwright/mcp per interaction, but it fits well when the screenshot itself is the deliverable or custom JS execution is the core need.
When mobile Chrome keeps redirecting back to the login page after sign-in, the culprit isn't always OAuth or broken frontend state. In this case, the root cause was that the HTTP entry point for app-dev.daodao.so wasn't issuing a 301 redirect to HTTPS, so /auth/me requests sent with an http origin didn't include the auth_token cookie.